{
  "schema_version": 1,
  "formal_base": {
    "status": "selected",
    "method": "world_harvest",
    "version": "world-c794856-harvest-v1",
    "reason": "ユーザー指定により、WORLD Harvestの音高推定とWORLDの解析・合成を初代ベースに設定。比較実験による品質最良の認定ではありません。",
    "comparison_reference": "world_harvest",
    "comparison_reference_meaning": "現在の正式ベース。同じ構成の行は自己比較となり、差分は0になります。"
  },
  "environment": {
    "python": "3.12.14",
    "numpy": "2.3.5",
    "scipy": "1.17.0",
    "platform": "Linux-6.18.44-x86_64-with-glibc2.39"
  },
  "parent_commit": "57ec9ea1848d4c2994c32f5c6890ca5dc35f0323",
  "source_sha256": {
    "vocoderbench/__init__.py": "73738d70706824f85fdfac302306af505437a50b0ca4cdc68fd57aec211a308d",
    "vocoderbench/audio_samples.py": "b9b975c1f305cdaff47909b99bd2a3dce64996e90774d2a8305adc1c67ed6c17",
    "vocoderbench/build_llsm.py": "e824b092c8400b8e37a4cf6640d9da94f8817eaf60b5fce46c1b36df685bbdb7",
    "vocoderbench/build_world.py": "972f6263bf54c82e109bbcfa855c54a3e82754d7a6b8bde9ed09514e65f3dc43",
    "vocoderbench/calibrate_pitch.py": "31edd8a51171f4affb277bb5c39022e8464b69feb392cb3cb29476a28211cdde",
    "vocoderbench/control.py": "bc41e73ff34b5f9cb52280a6f2317c989abc53f8b15f8f82db5ee3102b4b58bd",
    "vocoderbench/fixtures.py": "a1646c4d0f7c6966ea49a4673ec2c71e75f864943c8908395089d027325eac69",
    "vocoderbench/llsm_adapter.py": "76058a21733fe7434ab9fe0c34d84631195dddcad804743412f7744aadd9a82e",
    "vocoderbench/metrics.py": "8e1eebbe772b86efe16087121dfab01257940c22108f03206c8872aa613b683e",
    "vocoderbench/report.py": "5d817bc5759afc9b4223dc97fb4bca9a1587f320529a9b86d7f5d3ce09e43d69",
    "vocoderbench/run.py": "acc0ea8a884a29bad25957683bf63f8bd41f8ec54e23f4eb7e552ba4902789b1",
    "vocoderbench/world.py": "de678c684400d580df231c88a54833c236c7f382011a8896adc08bc56ab334a5"
  },
  "alignment": "none",
  "normalization": "none",
  "data_status": [
    {
      "status": "loaded",
      "speakers": 2,
      "excerpts": 2,
      "seconds_per_excerpt": 6
    }
  ],
  "fixture_seed": 20261011,
  "comparison_reference": "world_harvest",
  "cases": [
    {
      "id": "sine_120_16000",
      "kind": "known_periodic",
      "sr": 16000,
      "generator": "independent-analytic-fixtures-v1",
      "input_seed": 20261011,
      "n_samples": 19200,
      "input_float64_sha256": "72d5d4ea3ee7a1dccbef84794197f32ab47e34960f1868c03d4ba89382f73908"
    },
    {
      "id": "harmonic_110_16000",
      "kind": "known_periodic",
      "sr": 16000,
      "generator": "independent-analytic-fixtures-v1",
      "input_seed": 20261011,
      "n_samples": 19200,
      "input_float64_sha256": "61e908c2c1f4a4f2e4cac5b3f30824ee9c14cceb77aa8f9d89b07f4485ad6f72"
    },
    {
      "id": "harmonic_220_16000",
      "kind": "known_periodic",
      "sr": 16000,
      "generator": "independent-analytic-fixtures-v1",
      "input_seed": 20261011,
      "n_samples": 19200,
      "input_float64_sha256": "5bb721257f1848230583a7def692d99893888b8d421884dd18e4848000ef04c1"
    },
    {
      "id": "missing_fundamental_150_16000",
      "kind": "known_periodic",
      "sr": 16000,
      "generator": "independent-analytic-fixtures-v1",
      "input_seed": 20261011,
      "n_samples": 19200,
      "input_float64_sha256": "d73296c9724ec67d66690a674cdb8e475cc62ea0576a8b4a272c69225f61bec6"
    },
    {
      "id": "harmonic_sweep_90_240_16000",
      "kind": "known_periodic_sweep",
      "sr": 16000,
      "generator": "independent-analytic-fixtures-v1",
      "input_seed": 20261011,
      "n_samples": 24000,
      "input_float64_sha256": "b0046cd362d6425b88edbecd2c3dc0c685fcbac11bb74e52814380a17276cca4"
    },
    {
      "id": "pulse_iir_vowel_90_16000",
      "kind": "known_source_filter",
      "sr": 16000,
      "generator": "independent-analytic-fixtures-v1",
      "input_seed": 20261011,
      "n_samples": 19200,
      "input_float64_sha256": "918fbf0e9e3db9dfea818d2e22da9aa18e095ef4db16f49f656de6db74188916"
    },
    {
      "id": "am_noise_6hz_16000",
      "kind": "known_unvoiced",
      "sr": 16000,
      "generator": "independent-analytic-fixtures-v1",
      "input_seed": 20261011,
      "n_samples": 24000,
      "input_float64_sha256": "7456f44bcfef4d38052bf0b9b4c0d24787f876f97a1df0cdb30b4d3532fbcf41"
    },
    {
      "id": "voiced_unvoiced_boundaries_16000",
      "kind": "known_mixed",
      "sr": 16000,
      "generator": "independent-analytic-fixtures-v1",
      "input_seed": 20261011,
      "n_samples": 25600,
      "input_float64_sha256": "f93b9dd93f4c79d60977d6a075b182316fa6d9847f9c7914ef85ce60b55c60cf"
    },
    {
      "id": "silence_16000",
      "kind": "silence",
      "sr": 16000,
      "generator": "independent-analytic-fixtures-v1",
      "input_seed": 20261011,
      "n_samples": 12800,
      "input_float64_sha256": "f627ca4c2c322f15db26152df306bd4f983f0146409b81a4341b9b340c365a16"
    },
    {
      "id": "impulse_16000",
      "kind": "transient_diagnostic",
      "sr": 16000,
      "generator": "independent-analytic-fixtures-v1",
      "input_seed": 20261011,
      "n_samples": 12800,
      "input_float64_sha256": "ab0a2efbc74f17eeb85e5cd4666c6c977fe8f6e6e124336d269418550c417bca"
    },
    {
      "id": "sine_120_24000",
      "kind": "known_periodic",
      "sr": 24000,
      "generator": "independent-analytic-fixtures-v1",
      "input_seed": 20261011,
      "n_samples": 28800,
      "input_float64_sha256": "7b28885047dd680d227a2c5ce0f276410e4a3cbdae2143222a80d250dc797866"
    },
    {
      "id": "harmonic_110_24000",
      "kind": "known_periodic",
      "sr": 24000,
      "generator": "independent-analytic-fixtures-v1",
      "input_seed": 20261011,
      "n_samples": 28800,
      "input_float64_sha256": "f6f5ba5df9c7eeb1962f80f195fe91c092ede7df3d3479c6a22e49d17d6a57d5"
    },
    {
      "id": "harmonic_220_24000",
      "kind": "known_periodic",
      "sr": 24000,
      "generator": "independent-analytic-fixtures-v1",
      "input_seed": 20261011,
      "n_samples": 28800,
      "input_float64_sha256": "a88eb27f28507262ed88f8b7904f31380699c6187a25f5f6f7f42a384598b46a"
    },
    {
      "id": "missing_fundamental_150_24000",
      "kind": "known_periodic",
      "sr": 24000,
      "generator": "independent-analytic-fixtures-v1",
      "input_seed": 20261011,
      "n_samples": 28800,
      "input_float64_sha256": "6c169c6d869b6429ec7c71d5a0e4d370c09dd2e862f7195eb19db29ff0630488"
    },
    {
      "id": "harmonic_sweep_90_240_24000",
      "kind": "known_periodic_sweep",
      "sr": 24000,
      "generator": "independent-analytic-fixtures-v1",
      "input_seed": 20261011,
      "n_samples": 36000,
      "input_float64_sha256": "d08f0a93e4a979bfe7833f354536a0cdbd8ec57c61309d83c494a9d69e14073b"
    },
    {
      "id": "pulse_iir_vowel_90_24000",
      "kind": "known_source_filter",
      "sr": 24000,
      "generator": "independent-analytic-fixtures-v1",
      "input_seed": 20261011,
      "n_samples": 28800,
      "input_float64_sha256": "73c5ec410d60de72f75c4ef9caf8bbfb5aaa13570af7fce60fa241ab2d65c816"
    },
    {
      "id": "am_noise_6hz_24000",
      "kind": "known_unvoiced",
      "sr": 24000,
      "generator": "independent-analytic-fixtures-v1",
      "input_seed": 20261011,
      "n_samples": 36000,
      "input_float64_sha256": "2d161a3e3cfcd234527d5a230cad1b32b4c920224976ecd4429e3f781d9413f3"
    },
    {
      "id": "voiced_unvoiced_boundaries_24000",
      "kind": "known_mixed",
      "sr": 24000,
      "generator": "independent-analytic-fixtures-v1",
      "input_seed": 20261011,
      "n_samples": 38400,
      "input_float64_sha256": "c65954cd8f8f61fe666260ff0ae7eae569f400245c69d440e35bf6b9e2dda271"
    },
    {
      "id": "silence_24000",
      "kind": "silence",
      "sr": 24000,
      "generator": "independent-analytic-fixtures-v1",
      "input_seed": 20261011,
      "n_samples": 19200,
      "input_float64_sha256": "0c5cc90b079d0d9c1ded1376357d23a9782a704a83e01731f50ccd162e246492"
    },
    {
      "id": "impulse_24000",
      "kind": "transient_diagnostic",
      "sr": 24000,
      "generator": "independent-analytic-fixtures-v1",
      "input_seed": 20261011,
      "n_samples": 19200,
      "input_float64_sha256": "9309e0381e14d19fca6fd91df56d4a0b68496cf0e44f37a1c4ec5afac0a5c1e2"
    },
    {
      "id": "sine_120_48000",
      "kind": "known_periodic",
      "sr": 48000,
      "generator": "independent-analytic-fixtures-v1",
      "input_seed": 20261011,
      "n_samples": 57600,
      "input_float64_sha256": "d0e05420f0252a6b6912880fc6d4ff0ea9dcecd62add101a2136343c912c7912"
    },
    {
      "id": "harmonic_110_48000",
      "kind": "known_periodic",
      "sr": 48000,
      "generator": "independent-analytic-fixtures-v1",
      "input_seed": 20261011,
      "n_samples": 57600,
      "input_float64_sha256": "1ab9199432f997d1a4cbd902d9433ab5ea4859cedd44ee1a86c6ea7758c9f333"
    },
    {
      "id": "harmonic_220_48000",
      "kind": "known_periodic",
      "sr": 48000,
      "generator": "independent-analytic-fixtures-v1",
      "input_seed": 20261011,
      "n_samples": 57600,
      "input_float64_sha256": "a93ec90389ba3dcb2b6cd87e9e6669196b37ae18fbfe801185aec3cc600490fe"
    },
    {
      "id": "missing_fundamental_150_48000",
      "kind": "known_periodic",
      "sr": 48000,
      "generator": "independent-analytic-fixtures-v1",
      "input_seed": 20261011,
      "n_samples": 57600,
      "input_float64_sha256": "8aafc28385d6d4e38246dab34f0b0417be040fb7cf6d22e9b91a539bcf8ca6ef"
    },
    {
      "id": "harmonic_sweep_90_240_48000",
      "kind": "known_periodic_sweep",
      "sr": 48000,
      "generator": "independent-analytic-fixtures-v1",
      "input_seed": 20261011,
      "n_samples": 72000,
      "input_float64_sha256": "b9342d670a49ef90a6cd9954b388daa5a78f583026b9d5c56ed716907d998c3e"
    },
    {
      "id": "pulse_iir_vowel_90_48000",
      "kind": "known_source_filter",
      "sr": 48000,
      "generator": "independent-analytic-fixtures-v1",
      "input_seed": 20261011,
      "n_samples": 57600,
      "input_float64_sha256": "c983e6560d340e7b7d633aaa9b2ffce4bb316ecdf13bce489e16fd43b4c9d0d7"
    },
    {
      "id": "am_noise_6hz_48000",
      "kind": "known_unvoiced",
      "sr": 48000,
      "generator": "independent-analytic-fixtures-v1",
      "input_seed": 20261011,
      "n_samples": 72000,
      "input_float64_sha256": "4fa720cb65bc9ca935239b4be3171f99a5ebb84951daf6bf52db77e499e42790"
    },
    {
      "id": "voiced_unvoiced_boundaries_48000",
      "kind": "known_mixed",
      "sr": 48000,
      "generator": "independent-analytic-fixtures-v1",
      "input_seed": 20261011,
      "n_samples": 76800,
      "input_float64_sha256": "83e3448925e14fe0888376f30952cee6148564ea22cfb26b4f5ec795340c83f5"
    },
    {
      "id": "silence_48000",
      "kind": "silence",
      "sr": 48000,
      "generator": "independent-analytic-fixtures-v1",
      "input_seed": 20261011,
      "n_samples": 38400,
      "input_float64_sha256": "7818f5542a0404157573be6cffc0e0c8e68ce3c0f5d17d07ccdd9313fb700baf"
    },
    {
      "id": "impulse_48000",
      "kind": "transient_diagnostic",
      "sr": 48000,
      "generator": "independent-analytic-fixtures-v1",
      "input_seed": 20261011,
      "n_samples": 38400,
      "input_float64_sha256": "e69a73cff2e66d667e626c78971f8cd1ab3e15a442a34374859af03ff8200d68"
    },
    {
      "id": "librispeech_5142-36586_first6s",
      "kind": "natural_speech",
      "sr": 16000,
      "speaker": "5142",
      "source_file": "librispeech_5142-36586.wav",
      "source_file_sha256": "1b5f3637a3031cca864a3993e4a20e3f5cb7bf1fc5c51f1d72136a5a4f6231aa",
      "excerpt_start_sample": 0,
      "excerpt_samples": 96000,
      "n_samples": 96000,
      "input_float64_sha256": "fb11faac58eb060bfc90577e429d21abde1194225c538d10f6dfcdbc6f65fa20"
    },
    {
      "id": "librispeech_7021-79759_first6s",
      "kind": "natural_speech",
      "sr": 16000,
      "speaker": "7021",
      "source_file": "librispeech_7021-79759.wav",
      "source_file_sha256": "5535eca6eedc9ea24287d00cfbb9ee37d28f381343b7e3abf7e2310db2446295",
      "excerpt_start_sample": 0,
      "excerpt_samples": 96000,
      "n_samples": 96000,
      "input_float64_sha256": "facaba4a2055af5fff34620adaeb08e028f3f04a1045b6b8a2a6dfadc01c3de0"
    }
  ],
  "resynthesis": [
    {
      "case": "sine_120_16000",
      "kind": "known_periodic",
      "method": "identity",
      "base_method": "world_harvest",
      "decoder_family": "none",
      "f0_source": null,
      "role": "measurement_sanity_only_not_a_vocoder",
      "status": "measured",
      "seconds": 2.4296001356560737e-05,
      "rtf": 2.024666779713395e-05,
      "output_sha256": "72d5d4ea3ee7a1dccbef84794197f32ab47e34960f1868c03d4ba89382f73908",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 19200,
        "output_samples": 19200,
        "length_delta_samples": 0,
        "sample_rate": 16000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 80,
            "hop_samples": 20,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 3.941806022385313e-06
          },
          {
            "window_ms": 20,
            "window_samples": 320,
            "hop_samples": 80,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 2.26182902261729e-06
          },
          {
            "window_ms": 80,
            "window_samples": 1280,
            "hop_samples": 320,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 2.2525420327375667e-06
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.1223989132529024,
              "output_power": 0.1223989132529024,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 4.3525748203288054e-08,
              "output_power": 4.3525748203288054e-08,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 1.2759237148214641e-11,
              "output_power": 1.2759237148214641e-11,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 2.003048030212706e-13,
              "output_power": 2.003048030212706e-13,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 5.051440946447032e-15,
              "output_power": 5.051440946447032e-15,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 1.2503175028988497e-16,
              "output_power": 1.2503175028988497e-16,
              "delta_db": 0.0,
              "reference_active": false
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 1,
          "band_count": 6,
          "active_band_mae_db": 0.0,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.0,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1280
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 113,
          "expected_voiced_frames": 113,
          "expected_unvoiced_frames": 0,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 113,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": 0.030131128750209936,
          "abs_error_cents_p95": 0.03237711093418589,
          "voiced_detection_rate": 1.0,
          "unvoiced_false_positive_rate": null,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -9.122222836739189,
        "output_peak": 0.5,
        "reference_rms_dbfs": -9.122222836739189,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 0.0
      }
    },
    {
      "case": "sine_120_16000",
      "kind": "known_periodic",
      "method": "world_dio",
      "base_method": "world_harvest",
      "decoder_family": "WORLD",
      "f0_source": "WORLD DIO+StoneMask",
      "native_length_policy": "C API synthesizes requested n_samples directly; no crop/pad",
      "feature_scalars": 247507,
      "feature_f0_voiced_fraction": 0.995850622406639,
      "status": "measured",
      "seconds": 0.11453139200239093,
      "rtf": 0.09544282666865911,
      "output_sha256": "658fb755bc593de01d308f51f4f5a3515df92233ec5b49b8f02f8ceea2017fb2",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 19200,
        "output_samples": 19200,
        "length_delta_samples": 0,
        "sample_rate": 16000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 80,
            "hop_samples": 20,
            "log_magnitude_mae_db": 4.907281935537844,
            "spectral_convergence": 0.6417376325167525,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 3.941806022385313e-06
          },
          {
            "window_ms": 20,
            "window_samples": 320,
            "hop_samples": 80,
            "log_magnitude_mae_db": 7.716385617929297,
            "spectral_convergence": 0.5841175106314147,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 2.26182902261729e-06
          },
          {
            "window_ms": 80,
            "window_samples": 1280,
            "hop_samples": 320,
            "log_magnitude_mae_db": 5.121941123928068,
            "spectral_convergence": 0.582478982988446,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 2.2525420327375667e-06
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.1223989132529024,
              "output_power": 0.30462371139523564,
              "delta_db": 3.9598614322223877,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 4.3525748203288054e-08,
              "output_power": 0.00015434461994127098,
              "delta_db": 35.49745250354441,
              "reference_active": false
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 1.2759237148214641e-11,
              "output_power": 1.493852360754841e-07,
              "delta_db": 40.684829682713,
              "reference_active": false
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 2.003048030212706e-13,
              "output_power": 4.8052229005859955e-08,
              "delta_db": 46.817135381542485,
              "reference_active": false
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 5.051440946447032e-15,
              "output_power": 2.3614865641980138e-08,
              "delta_db": 43.731854789784556,
              "reference_active": false
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 1.2503175028988497e-16,
              "output_power": 1.6163854552279936e-08,
              "delta_db": 42.08544933862517,
              "reference_active": false
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 1,
          "band_count": 6,
          "active_band_mae_db": 3.9598614322223877,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 3.9620631633643395,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1280
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 113,
          "expected_voiced_frames": 113,
          "expected_unvoiced_frames": 0,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 113,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": 1.5286824417491325,
          "abs_error_cents_p95": 3.020462729350728,
          "voiced_detection_rate": 1.0,
          "unvoiced_false_positive_rate": null,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -5.160159673374849,
        "output_peak": 0.849462346892211,
        "reference_rms_dbfs": -9.122222836739189,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 5.915202892465069
      }
    },
    {
      "case": "sine_120_16000",
      "kind": "known_periodic",
      "method": "world_harvest",
      "base_method": "world_harvest",
      "decoder_family": "WORLD",
      "f0_source": "WORLD Harvest",
      "native_length_policy": "C API synthesizes requested n_samples directly; no crop/pad",
      "feature_scalars": 247507,
      "feature_f0_voiced_fraction": 0.016597510373443983,
      "status": "measured",
      "seconds": 0.19472071400014102,
      "rtf": 0.16226726166678418,
      "output_sha256": "19cdb987f9230807fe420e78895b898e23565ffc5eab8ec46e8d71f663d50e60",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 19200,
        "output_samples": 19200,
        "length_delta_samples": 0,
        "sample_rate": 16000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 80,
            "hop_samples": 20,
            "log_magnitude_mae_db": 4.694686460185058,
            "spectral_convergence": 0.8021222918640136,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 3.941806022385313e-06
          },
          {
            "window_ms": 20,
            "window_samples": 320,
            "hop_samples": 80,
            "log_magnitude_mae_db": 10.490259613616475,
            "spectral_convergence": 1.0833747615127303,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 2.26182902261729e-06
          },
          {
            "window_ms": 80,
            "window_samples": 1280,
            "hop_samples": 320,
            "log_magnitude_mae_db": 11.90810753132407,
            "spectral_convergence": 1.1986631506807948,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 2.2525420327375667e-06
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.1223989132529024,
              "output_power": 0.014787985455459868,
              "delta_db": -9.178685470862101,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 4.3525748203288054e-08,
              "output_power": 0.06863772028218044,
              "delta_db": 61.97816605188309,
              "reference_active": false
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 1.2759237148214641e-11,
              "output_power": 0.0012328466588290058,
              "delta_db": 79.85084353034303,
              "reference_active": false
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 2.003048030212706e-13,
              "output_power": 5.836620862013423e-07,
              "delta_db": 57.66161483119431,
              "reference_active": false
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 5.051440946447032e-15,
              "output_power": 8.056898999732409e-08,
              "delta_db": 49.06167919417435,
              "reference_active": false
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 1.2503175028988497e-16,
              "output_power": 4.621823087167086e-08,
              "delta_db": 46.64813317660275,
              "reference_active": false
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 1,
          "band_count": 6,
          "active_band_mae_db": 9.178685470862101,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": -1.6010323370717074,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1280
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 113,
          "expected_voiced_frames": 113,
          "expected_unvoiced_frames": 0,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 0,
          "missing_voiced_frames": 113,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": null,
          "abs_error_cents_p95": null,
          "voiced_detection_rate": 0.0,
          "unvoiced_false_positive_rate": null,
          "score_status": "no_valid_voiced_frames",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -10.723255173810898,
        "output_peak": 1.3598599971780116,
        "reference_rms_dbfs": -9.122222836739189,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 9.031017868375201
      }
    },
    {
      "case": "sine_120_16000",
      "kind": "known_periodic",
      "method": "llsm_world_dio",
      "base_method": "world_harvest",
      "decoder_family": "LLSM layer0",
      "f0_source": "WORLD DIO+StoneMask",
      "native_metadata": {
        "method": "llsm-layer0-czt-external-f0",
        "sample_rate": 16000,
        "input_samples": 19200,
        "output_samples": 19200,
        "native_output_samples": 19360,
        "trimmed_tail_samples": 160,
        "fixed_delay_samples": 0,
        "hop_seconds": 0.005,
        "seed": 0,
        "f0_refine": false,
        "native_rng_seed": 1,
        "rng": "libc srand/rand; same pinned runtime only",
        "normalization": "none",
        "residual_waveform_bypass": false,
        "noise_band_edges_hz": [
          2000,
          4000
        ]
      },
      "status": "measured",
      "seconds": 0.11618166200059932,
      "rtf": 0.0968180516671661,
      "output_sha256": "e4f55d3408a28c23effe6d1bb7bc525ecb9c317c5129ff6ef6d717f67b54530f",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 19200,
        "output_samples": 19200,
        "length_delta_samples": 0,
        "sample_rate": 16000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 80,
            "hop_samples": 20,
            "log_magnitude_mae_db": 2.470364901301234,
            "spectral_convergence": 0.023968310529963902,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 3.941806022385313e-06
          },
          {
            "window_ms": 20,
            "window_samples": 320,
            "hop_samples": 80,
            "log_magnitude_mae_db": 4.88054517975873,
            "spectral_convergence": 0.0209432279513982,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 2.26182902261729e-06
          },
          {
            "window_ms": 80,
            "window_samples": 1280,
            "hop_samples": 320,
            "log_magnitude_mae_db": 4.761203377420488,
            "spectral_convergence": 0.020416520520358698,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 2.2525420327375667e-06
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.1223989132529024,
              "output_power": 0.12050029758407853,
              "delta_db": -0.06789442409117981,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 4.3525748203288054e-08,
              "output_power": 4.0981849103022295e-06,
              "delta_db": 19.73845304562843,
              "reference_active": false
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 1.2759237148214641e-11,
              "output_power": 4.111956396235825e-07,
              "delta_db": 45.08223791214593,
              "reference_active": false
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 2.003048030212706e-13,
              "output_power": 1.5926624817556403e-07,
              "delta_db": 52.02123749535038,
              "reference_active": false
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 5.051440946447032e-15,
              "output_power": 8.499523381091978e-08,
              "delta_db": 49.29394572918377,
              "reference_active": false
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 1.2503175028988497e-16,
              "output_power": 4.059103548246723e-08,
              "delta_db": 46.084301303659565,
              "reference_active": false
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 1,
          "band_count": 6,
          "active_band_mae_db": 0.06789442409117981,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": -0.06772318366483843,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1280
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 113,
          "expected_voiced_frames": 113,
          "expected_unvoiced_frames": 0,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 113,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": 0.11437664333234239,
          "abs_error_cents_p95": 0.7375674031773022,
          "voiced_detection_rate": 1.0,
          "unvoiced_false_positive_rate": null,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -9.189946020404028,
        "output_peak": 0.5177392138415742,
        "reference_rms_dbfs": -9.122222836739189,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 4.037371152826817
      }
    },
    {
      "case": "harmonic_110_16000",
      "kind": "known_periodic",
      "method": "identity",
      "base_method": "world_harvest",
      "decoder_family": "none",
      "f0_source": null,
      "role": "measurement_sanity_only_not_a_vocoder",
      "status": "measured",
      "seconds": 2.2854001144878566e-05,
      "rtf": 1.9045000954065472e-05,
      "output_sha256": "61e908c2c1f4a4f2e4cac5b3f30824ee9c14cceb77aa8f9d89b07f4485ad6f72",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 19200,
        "output_samples": 19200,
        "length_delta_samples": 0,
        "sample_rate": 16000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 80,
            "hop_samples": 20,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 2.976044629480609e-06
          },
          {
            "window_ms": 20,
            "window_samples": 320,
            "hop_samples": 80,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.5995360552283572e-06
          },
          {
            "window_ms": 80,
            "window_samples": 1280,
            "hop_samples": 320,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.5800497103667606e-06
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.05147918597288733,
              "output_power": 0.05147918597288733,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.012842494613159137,
              "output_power": 0.012842494613159137,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.00199891954710928,
              "output_power": 0.00199891954710928,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.0005740401624226474,
              "output_power": 0.0005740401624226474,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.0002000693024622835,
              "output_power": 0.0002000693024622835,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 4.8188345938719944e-05,
              "output_power": 4.8188345938719944e-05,
              "delta_db": 0.0,
              "reference_active": true
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 6,
          "band_count": 6,
          "active_band_mae_db": 0.0,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.0,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1280
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 113,
          "expected_voiced_frames": 113,
          "expected_unvoiced_frames": 0,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 113,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": 0.024150079212343203,
          "abs_error_cents_p95": 0.02530063271103916,
          "voiced_detection_rate": 1.0,
          "unvoiced_false_positive_rate": null,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -11.729999181681606,
        "output_peak": 0.6,
        "reference_rms_dbfs": -11.729999181681606,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 0.0
      }
    },
    {
      "case": "harmonic_110_16000",
      "kind": "known_periodic",
      "method": "world_dio",
      "base_method": "world_harvest",
      "decoder_family": "WORLD",
      "f0_source": "WORLD DIO+StoneMask",
      "native_length_policy": "C API synthesizes requested n_samples directly; no crop/pad",
      "feature_scalars": 247507,
      "feature_f0_voiced_fraction": 0.995850622406639,
      "status": "measured",
      "seconds": 0.10747677400286193,
      "rtf": 0.08956397833571828,
      "output_sha256": "5f0878ce3cbe5a40e719af6f76c2780d936c5a50757973d0c178e50d3f6ed8d4",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 19200,
        "output_samples": 19200,
        "length_delta_samples": 0,
        "sample_rate": 16000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 80,
            "hop_samples": 20,
            "log_magnitude_mae_db": 15.639291507460987,
            "spectral_convergence": 0.5096032332202309,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 2.976044629480609e-06
          },
          {
            "window_ms": 20,
            "window_samples": 320,
            "hop_samples": 80,
            "log_magnitude_mae_db": 3.155157060756245,
            "spectral_convergence": 0.13796166291967268,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.5995360552283572e-06
          },
          {
            "window_ms": 80,
            "window_samples": 1280,
            "hop_samples": 320,
            "log_magnitude_mae_db": 3.6864903200209906,
            "spectral_convergence": 0.08059440792268167,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.5800497103667606e-06
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.05147918597288733,
              "output_power": 0.0601304555090617,
              "delta_db": 0.6746282288950517,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.012842494613159137,
              "output_power": 0.01265855611035338,
              "delta_db": -0.062652212298616,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.00199891954710928,
              "output_power": 0.0019138773703713246,
              "delta_db": -0.1888120752202614,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.0005740401624226474,
              "output_power": 0.0005502428860392772,
              "delta_db": -0.18387842278877328,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.0002000693024622835,
              "output_power": 0.00019197829991452186,
              "delta_db": -0.1792831656978483,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 4.8188345938719944e-05,
              "output_power": 4.8867639152310205e-05,
              "delta_db": 0.06079338873790103,
              "reference_active": true
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 6,
          "band_count": 6,
          "active_band_mae_db": 0.22500791560640862,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.5091222733278964,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1280
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 113,
          "expected_voiced_frames": 113,
          "expected_unvoiced_frames": 0,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 113,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": 0.032113631101580054,
          "abs_error_cents_p95": 0.08252056519986625,
          "voiced_detection_rate": 1.0,
          "unvoiced_false_positive_rate": null,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -11.22087690835371,
        "output_peak": 0.5780935411163592,
        "reference_rms_dbfs": -11.729999181681606,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 7.493646296079407
      }
    },
    {
      "case": "harmonic_110_16000",
      "kind": "known_periodic",
      "method": "world_harvest",
      "base_method": "world_harvest",
      "decoder_family": "WORLD",
      "f0_source": "WORLD Harvest",
      "native_length_policy": "C API synthesizes requested n_samples directly; no crop/pad",
      "feature_scalars": 247507,
      "feature_f0_voiced_fraction": 1.0,
      "status": "measured",
      "seconds": 0.25886875500145834,
      "rtf": 0.21572396250121528,
      "output_sha256": "37489d7a83e4957859788da30e4504c731a1ab921640f627b949c5ef5e34c79b",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 19200,
        "output_samples": 19200,
        "length_delta_samples": 0,
        "sample_rate": 16000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 80,
            "hop_samples": 20,
            "log_magnitude_mae_db": 15.668816084956388,
            "spectral_convergence": 0.5265149311040059,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 2.976044629480609e-06
          },
          {
            "window_ms": 20,
            "window_samples": 320,
            "hop_samples": 80,
            "log_magnitude_mae_db": 3.10880577829381,
            "spectral_convergence": 0.11489116312001141,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.5995360552283572e-06
          },
          {
            "window_ms": 80,
            "window_samples": 1280,
            "hop_samples": 320,
            "log_magnitude_mae_db": 3.2326639011063554,
            "spectral_convergence": 0.07624836058523814,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.5800497103667606e-06
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.05147918597288733,
              "output_power": 0.06024035494412739,
              "delta_db": 0.682558512208018,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.012842494613159137,
              "output_power": 0.012675179941359358,
              "delta_db": -0.056952587817263825,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.00199891954710928,
              "output_power": 0.0019192407745521733,
              "delta_db": -0.1766585319584951,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.0005740401624226474,
              "output_power": 0.0005508659146263725,
              "delta_db": -0.1789637784565291,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.0002000693024622835,
              "output_power": 0.00019232390422850053,
              "delta_db": -0.17147191271373846,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 4.8188345938719944e-05,
              "output_power": 4.887247240074342e-05,
              "delta_db": 0.0612229059734696,
              "reference_active": true
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 6,
          "band_count": 6,
          "active_band_mae_db": 0.22130470485458573,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.5167586057124067,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1280
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 113,
          "expected_voiced_frames": 113,
          "expected_unvoiced_frames": 0,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 113,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": 0.02001536216196603,
          "abs_error_cents_p95": 0.05903288809980686,
          "voiced_detection_rate": 1.0,
          "unvoiced_false_positive_rate": null,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -11.213240575969198,
        "output_peak": 0.5643427098173424,
        "reference_rms_dbfs": -11.729999181681606,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 7.336761921452184
      }
    },
    {
      "case": "harmonic_110_16000",
      "kind": "known_periodic",
      "method": "llsm_world_dio",
      "base_method": "world_harvest",
      "decoder_family": "LLSM layer0",
      "f0_source": "WORLD DIO+StoneMask",
      "native_metadata": {
        "method": "llsm-layer0-czt-external-f0",
        "sample_rate": 16000,
        "input_samples": 19200,
        "output_samples": 19200,
        "native_output_samples": 19360,
        "trimmed_tail_samples": 160,
        "fixed_delay_samples": 0,
        "hop_seconds": 0.005,
        "seed": 0,
        "f0_refine": false,
        "native_rng_seed": 1,
        "rng": "libc srand/rand; same pinned runtime only",
        "normalization": "none",
        "residual_waveform_bypass": false,
        "noise_band_edges_hz": [
          2000,
          4000
        ]
      },
      "status": "measured",
      "seconds": 0.1032139669987373,
      "rtf": 0.08601163916561443,
      "output_sha256": "eea0ebcd1ea46374f22dd47dfa93a244046a00db7a06c5f0f11cf261e2e06572",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 19200,
        "output_samples": 19200,
        "length_delta_samples": 0,
        "sample_rate": 16000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 80,
            "hop_samples": 20,
            "log_magnitude_mae_db": 1.104697325417123,
            "spectral_convergence": 0.034576911419342486,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 2.976044629480609e-06
          },
          {
            "window_ms": 20,
            "window_samples": 320,
            "hop_samples": 80,
            "log_magnitude_mae_db": 0.8232713903088998,
            "spectral_convergence": 0.02825250925263043,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.5995360552283572e-06
          },
          {
            "window_ms": 80,
            "window_samples": 1280,
            "hop_samples": 320,
            "log_magnitude_mae_db": 1.877484897062715,
            "spectral_convergence": 0.024504550645085926,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.5800497103667606e-06
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.05147918597288733,
              "output_power": 0.050590114331404624,
              "delta_db": -0.07566010003968664,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.012842494613159137,
              "output_power": 0.012643008710829252,
              "delta_db": -0.06798955069554403,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.00199891954710928,
              "output_power": 0.001969006367251782,
              "delta_db": -0.06548194368503307,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.0005740401624226474,
              "output_power": 0.000565099409680419,
              "delta_db": -0.06817425028198264,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.0002000693024622835,
              "output_power": 0.00019697808162421563,
              "delta_db": -0.06762554455877634,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 4.8188345938719944e-05,
              "output_power": 4.738954262988335e-05,
              "delta_db": -0.07259502213674372,
              "reference_active": true
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 6,
          "band_count": 6,
          "active_band_mae_db": 0.06958773523296108,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": -0.07379845850680065,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1280
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 113,
          "expected_voiced_frames": 113,
          "expected_unvoiced_frames": 0,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 113,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": 0.03809709291701154,
          "abs_error_cents_p95": 0.1392833342094995,
          "voiced_detection_rate": 1.0,
          "unvoiced_false_positive_rate": null,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -11.803797640188407,
        "output_peak": 0.6021506937687195,
        "reference_rms_dbfs": -11.729999181681606,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 1.268484537596246
      }
    },
    {
      "case": "harmonic_220_16000",
      "kind": "known_periodic",
      "method": "identity",
      "base_method": "world_harvest",
      "decoder_family": "none",
      "f0_source": null,
      "role": "measurement_sanity_only_not_a_vocoder",
      "status": "measured",
      "seconds": 1.8086997442878783e-05,
      "rtf": 1.5072497869065653e-05,
      "output_sha256": "5bb721257f1848230583a7def692d99893888b8d421884dd18e4848000ef04c1",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 19200,
        "output_samples": 19200,
        "length_delta_samples": 0,
        "sample_rate": 16000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 80,
            "hop_samples": 20,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.8831011704983265e-06
          },
          {
            "window_ms": 20,
            "window_samples": 320,
            "hop_samples": 80,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.4861423760000773e-06
          },
          {
            "window_ms": 80,
            "window_samples": 1280,
            "hop_samples": 320,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.4842442020779748e-06
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 5.49916784158012e-05,
              "output_power": 5.49916784158012e-05,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.061855119859678724,
              "output_power": 0.061855119859678724,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.004500346924411444,
              "output_power": 0.004500346924411444,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.0020644179058127428,
              "output_power": 0.0020644179058127428,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.0005925150620932784,
              "output_power": 0.0005925150620932784,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 0.00014632183659341974,
              "output_power": 0.00014632183659341974,
              "delta_db": 0.0,
              "reference_active": true
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 6,
          "band_count": 6,
          "active_band_mae_db": 0.0,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.0,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1280
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 113,
          "expected_voiced_frames": 113,
          "expected_unvoiced_frames": 0,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 113,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": 0.06874692594848918,
          "abs_error_cents_p95": 0.07365278710174623,
          "voiced_detection_rate": 1.0,
          "unvoiced_false_positive_rate": null,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -11.598078505409127,
        "output_peak": 0.6,
        "reference_rms_dbfs": -11.598078505409127,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 0.0
      }
    },
    {
      "case": "harmonic_220_16000",
      "kind": "known_periodic",
      "method": "world_dio",
      "base_method": "world_harvest",
      "decoder_family": "WORLD",
      "f0_source": "WORLD DIO+StoneMask",
      "native_length_policy": "C API synthesizes requested n_samples directly; no crop/pad",
      "feature_scalars": 247507,
      "feature_f0_voiced_fraction": 0.995850622406639,
      "status": "measured",
      "seconds": 0.10274143599963281,
      "rtf": 0.08561786333302734,
      "output_sha256": "1cbfcbff62be2f1edc4c5df20dad9d0968f030db71fa558624aa7007ef5598d4",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 19200,
        "output_samples": 19200,
        "length_delta_samples": 0,
        "sample_rate": 16000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 80,
            "hop_samples": 20,
            "log_magnitude_mae_db": 8.435545417391744,
            "spectral_convergence": 0.5903920165244848,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.8831011704983265e-06
          },
          {
            "window_ms": 20,
            "window_samples": 320,
            "hop_samples": 80,
            "log_magnitude_mae_db": 4.339114145530458,
            "spectral_convergence": 0.08066740960310172,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.4861423760000773e-06
          },
          {
            "window_ms": 80,
            "window_samples": 1280,
            "hop_samples": 320,
            "log_magnitude_mae_db": 9.563955304863516,
            "spectral_convergence": 0.07661922321078155,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.4842442020779748e-06
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 5.49916784158012e-05,
              "output_power": 0.0001245901875300599,
              "delta_db": 3.5518686441650775,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.061855119859678724,
              "output_power": 0.07074061029617582,
              "delta_db": 0.5829314946791861,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.004500346924411444,
              "output_power": 0.004285676820222004,
              "delta_db": -0.21226576010847512,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.0020644179058127428,
              "output_power": 0.0019778673181652696,
              "delta_db": -0.18600462946808174,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.0005925150620932784,
              "output_power": 0.0005686374417518061,
              "delta_db": -0.17863942574176586,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 0.00014632183659341974,
              "output_power": 0.0001558111469937226,
              "delta_db": 0.2728938095852351,
              "reference_active": true
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 6,
          "band_count": 6,
          "active_band_mae_db": 0.8307672939579702,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.5108428074506695,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1280
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 113,
          "expected_voiced_frames": 113,
          "expected_unvoiced_frames": 0,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 113,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": 0.06402533767076328,
          "abs_error_cents_p95": 0.1574484112781887,
          "voiced_detection_rate": 1.0,
          "unvoiced_false_positive_rate": null,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -11.087235697958457,
        "output_peak": 0.5965535906821268,
        "reference_rms_dbfs": -11.598078505409127,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 7.446204955928573
      }
    },
    {
      "case": "harmonic_220_16000",
      "kind": "known_periodic",
      "method": "world_harvest",
      "base_method": "world_harvest",
      "decoder_family": "WORLD",
      "f0_source": "WORLD Harvest",
      "native_length_policy": "C API synthesizes requested n_samples directly; no crop/pad",
      "feature_scalars": 247507,
      "feature_f0_voiced_fraction": 1.0,
      "status": "measured",
      "seconds": 0.21772104300180217,
      "rtf": 0.18143420250150183,
      "output_sha256": "88340397f2c1cd99bdcb8366433fab59a8b52ad12e1b492b592b9daf956bae82",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 19200,
        "output_samples": 19200,
        "length_delta_samples": 0,
        "sample_rate": 16000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 80,
            "hop_samples": 20,
            "log_magnitude_mae_db": 8.85571670168225,
            "spectral_convergence": 0.3601509441028039,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.8831011704983265e-06
          },
          {
            "window_ms": 20,
            "window_samples": 320,
            "hop_samples": 80,
            "log_magnitude_mae_db": 4.376874321403996,
            "spectral_convergence": 0.07836178605653908,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.4861423760000773e-06
          },
          {
            "window_ms": 80,
            "window_samples": 1280,
            "hop_samples": 320,
            "log_magnitude_mae_db": 9.366531743699325,
            "spectral_convergence": 0.07612046629850226,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.4842442020779748e-06
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 5.49916784158012e-05,
              "output_power": 0.00010963168930912506,
              "delta_db": 2.996391310788977,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.061855119859678724,
              "output_power": 0.07072882524116433,
              "delta_db": 0.5822079200988803,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.004500346924411444,
              "output_power": 0.004283957371163579,
              "delta_db": -0.21400853519392543,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.0020644179058127428,
              "output_power": 0.0019771487943851668,
              "delta_db": -0.18758263020116514,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.0005925150620932784,
              "output_power": 0.0005682707453401215,
              "delta_db": -0.18144095774688146,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 0.00014632183659341974,
              "output_power": 0.00015610730142642763,
              "delta_db": 0.2811407263812906,
              "reference_active": true
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 6,
          "band_count": 6,
          "active_band_mae_db": 0.7404620134018532,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.5092107101050186,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1280
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 113,
          "expected_voiced_frames": 113,
          "expected_unvoiced_frames": 0,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 113,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": 0.07117544429237412,
          "abs_error_cents_p95": 0.15219439122321185,
          "voiced_detection_rate": 1.0,
          "unvoiced_false_positive_rate": null,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -11.088867795304107,
        "output_peak": 0.601584713579771,
        "reference_rms_dbfs": -11.598078505409127,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 7.533040922261857
      }
    },
    {
      "case": "harmonic_220_16000",
      "kind": "known_periodic",
      "method": "llsm_world_dio",
      "base_method": "world_harvest",
      "decoder_family": "LLSM layer0",
      "f0_source": "WORLD DIO+StoneMask",
      "native_metadata": {
        "method": "llsm-layer0-czt-external-f0",
        "sample_rate": 16000,
        "input_samples": 19200,
        "output_samples": 19200,
        "native_output_samples": 19360,
        "trimmed_tail_samples": 160,
        "fixed_delay_samples": 0,
        "hop_seconds": 0.005,
        "seed": 0,
        "f0_refine": false,
        "native_rng_seed": 1,
        "rng": "libc srand/rand; same pinned runtime only",
        "normalization": "none",
        "residual_waveform_bypass": false,
        "noise_band_edges_hz": [
          2000,
          4000
        ]
      },
      "status": "measured",
      "seconds": 0.056127659998310264,
      "rtf": 0.04677304999859189,
      "output_sha256": "a2223b878b121ded900a55e6cebb136742fe843954af6452f11aa26f4c128086",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 19200,
        "output_samples": 19200,
        "length_delta_samples": 0,
        "sample_rate": 16000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 80,
            "hop_samples": 20,
            "log_magnitude_mae_db": 1.050416430373136,
            "spectral_convergence": 0.015655129146377164,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.8831011704983265e-06
          },
          {
            "window_ms": 20,
            "window_samples": 320,
            "hop_samples": 80,
            "log_magnitude_mae_db": 1.2378358954484199,
            "spectral_convergence": 0.013719837915872729,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.4861423760000773e-06
          },
          {
            "window_ms": 80,
            "window_samples": 1280,
            "hop_samples": 320,
            "log_magnitude_mae_db": 3.8161345400278663,
            "spectral_convergence": 0.013312057724987059,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.4842442020779748e-06
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 5.49916784158012e-05,
              "output_power": 3.9505808046550504e-05,
              "delta_db": -1.436360258778722,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.061855119859678724,
              "output_power": 0.06100947832743393,
              "delta_db": -0.05978341294574922,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.004500346924411444,
              "output_power": 0.004442578875267354,
              "delta_db": -0.05610846941435542,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.0020644179058127428,
              "output_power": 0.0020374512626393556,
              "delta_db": -0.05710388398230748,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.0005925150620932784,
              "output_power": 0.0005845593855885212,
              "delta_db": -0.05870756987851648,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 0.00014632183659341974,
              "output_power": 0.00014431356966156838,
              "delta_db": -0.06001974361171046,
              "reference_active": true
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 6,
          "band_count": 6,
          "active_band_mae_db": 0.2880138897685602,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": -0.060393079299566534,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1280
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 113,
          "expected_voiced_frames": 113,
          "expected_unvoiced_frames": 0,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 113,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": 0.06805690360998129,
          "abs_error_cents_p95": 0.15601028571396797,
          "voiced_detection_rate": 1.0,
          "unvoiced_false_positive_rate": null,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -11.658471584708694,
        "output_peak": 0.6015833770746263,
        "reference_rms_dbfs": -11.598078505409127,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 2.0347956219498076
      }
    },
    {
      "case": "missing_fundamental_150_16000",
      "kind": "known_periodic",
      "method": "identity",
      "base_method": "world_harvest",
      "decoder_family": "none",
      "f0_source": null,
      "role": "measurement_sanity_only_not_a_vocoder",
      "status": "measured",
      "seconds": 3.0315000913105905e-05,
      "rtf": 2.526250076092159e-05,
      "output_sha256": "d73296c9724ec67d66690a674cdb8e475cc62ea0576a8b4a272c69225f61bec6",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 19200,
        "output_samples": 19200,
        "length_delta_samples": 0,
        "sample_rate": 16000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 80,
            "hop_samples": 20,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.6784924591140252e-06
          },
          {
            "window_ms": 20,
            "window_samples": 320,
            "hop_samples": 80,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 9.594546200812243e-07
          },
          {
            "window_ms": 80,
            "window_samples": 1280,
            "hop_samples": 320,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 9.594546200811852e-07
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 2.061915115378003e-09,
              "output_power": 2.061915115378003e-09,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.026039993468199775,
              "output_power": 0.026039993468199775,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.009394429724971783,
              "output_power": 0.009394429724971783,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.005733143649652568,
              "output_power": 0.005733143649652568,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.0006884043848610362,
              "output_power": 0.0006884043848610362,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 1.7542304123327258e-15,
              "output_power": 1.7542304123327258e-15,
              "delta_db": 0.0,
              "reference_active": false
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 4,
          "band_count": 6,
          "active_band_mae_db": 0.0,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.0,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1280
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 113,
          "expected_voiced_frames": 113,
          "expected_unvoiced_frames": 0,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 113,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": 0.04531963559402408,
          "abs_error_cents_p95": 0.1094055094280233,
          "voiced_detection_rate": 1.0,
          "unvoiced_false_positive_rate": null,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -13.7824255483687,
        "output_peak": 0.6,
        "reference_rms_dbfs": -13.7824255483687,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 0.0
      }
    },
    {
      "case": "missing_fundamental_150_16000",
      "kind": "known_periodic",
      "method": "world_dio",
      "base_method": "world_harvest",
      "decoder_family": "WORLD",
      "f0_source": "WORLD DIO+StoneMask",
      "native_length_policy": "C API synthesizes requested n_samples directly; no crop/pad",
      "feature_scalars": 247507,
      "feature_f0_voiced_fraction": 0.995850622406639,
      "status": "measured",
      "seconds": 0.10131435999937821,
      "rtf": 0.08442863333281518,
      "output_sha256": "a7ea24202bcb461df436b64a1fcd946296f3e7c1aa8d15b223430e68f7cdc6a1",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 19200,
        "output_samples": 19200,
        "length_delta_samples": 0,
        "sample_rate": 16000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 80,
            "hop_samples": 20,
            "log_magnitude_mae_db": 6.821428730433196,
            "spectral_convergence": 0.6311054806817863,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.6784924591140252e-06
          },
          {
            "window_ms": 20,
            "window_samples": 320,
            "hop_samples": 80,
            "log_magnitude_mae_db": 8.529734154448262,
            "spectral_convergence": 0.5748763215290995,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 9.594546200812243e-07
          },
          {
            "window_ms": 80,
            "window_samples": 1280,
            "hop_samples": 320,
            "log_magnitude_mae_db": 19.00326966751786,
            "spectral_convergence": 0.7552279257806025,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 9.594546200811852e-07
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 2.061915115378003e-09,
              "output_power": 4.28275417369378e-05,
              "delta_db": 43.17452364649006,
              "reference_active": false
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.026039993468199775,
              "output_power": 0.02447154927474931,
              "delta_db": -0.269794058909401,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.009394429724971783,
              "output_power": 0.014114594151968553,
              "delta_db": 1.7679797302209075,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.005733143649652568,
              "output_power": 0.004806365252106574,
              "delta_db": -0.7657605235141793,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.0006884043848610362,
              "output_power": 0.0012910129097841508,
              "delta_db": 2.7308695717015463,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 1.7542304123327258e-15,
              "output_power": 1.3319980956947177e-10,
              "delta_db": 21.245036039409886,
              "reference_active": false
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 4,
          "band_count": 6,
          "active_band_mae_db": 1.3836009710865085,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.28806005672114415,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1280
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 113,
          "expected_voiced_frames": 113,
          "expected_unvoiced_frames": 0,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 113,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 113,
          "abs_error_cents_median": 1226.710673010873,
          "abs_error_cents_p95": 1229.3664242130812,
          "voiced_detection_rate": 1.0,
          "unvoiced_false_positive_rate": null,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -13.494365491647557,
        "output_peak": 0.85378388066463,
        "reference_rms_dbfs": -13.7824255483687,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 11.451477517466438
      }
    },
    {
      "case": "missing_fundamental_150_16000",
      "kind": "known_periodic",
      "method": "world_harvest",
      "base_method": "world_harvest",
      "decoder_family": "WORLD",
      "f0_source": "WORLD Harvest",
      "native_length_policy": "C API synthesizes requested n_samples directly; no crop/pad",
      "feature_scalars": 247507,
      "feature_f0_voiced_fraction": 0.0,
      "status": "measured",
      "seconds": 0.16350427699944703,
      "rtf": 0.13625356416620588,
      "output_sha256": "cc0e7d2c93e74d08265f28460bdfc6d4a81afd476fb38b3c38cab4166ed7afed",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 19200,
        "output_samples": 19200,
        "length_delta_samples": 0,
        "sample_rate": 16000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 80,
            "hop_samples": 20,
            "log_magnitude_mae_db": 7.391858191879638,
            "spectral_convergence": 0.8271428943046177,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.6784924591140252e-06
          },
          {
            "window_ms": 20,
            "window_samples": 320,
            "hop_samples": 80,
            "log_magnitude_mae_db": 10.45132830203925,
            "spectral_convergence": 0.7256639734445248,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 9.594546200812243e-07
          },
          {
            "window_ms": 80,
            "window_samples": 1280,
            "hop_samples": 320,
            "log_magnitude_mae_db": 22.12305358088114,
            "spectral_convergence": 1.1264732527779227,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 9.594546200811852e-07
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 2.061915115378003e-09,
              "output_power": 0.00389208034966743,
              "delta_db": 62.75911015094942,
              "reference_active": false
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.026039993468199775,
              "output_power": 0.0237418789189162,
              "delta_db": -0.4012578515976834,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.009394429724971783,
              "output_power": 0.013745633764876666,
              "delta_db": 1.6529434646752217,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.005733143649652568,
              "output_power": 0.00576054959441781,
              "delta_db": 0.020710963633806014,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.0006884043848610362,
              "output_power": 0.0014210941031623657,
              "delta_db": 3.1477920939730764,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 1.7542304123327258e-15,
              "output_power": 3.7440522692588885e-09,
              "delta_db": 35.73341903124896,
              "reference_active": false
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 4,
          "band_count": 6,
          "active_band_mae_db": 1.305676093469947,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.6453232690338823,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1280
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 113,
          "expected_voiced_frames": 113,
          "expected_unvoiced_frames": 0,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 0,
          "missing_voiced_frames": 113,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": null,
          "abs_error_cents_p95": null,
          "voiced_detection_rate": 0.0,
          "unvoiced_false_positive_rate": null,
          "score_status": "no_valid_voiced_frames",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -13.137102279334819,
        "output_peak": 1.2938415771657863,
        "reference_rms_dbfs": -13.7824255483687,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 13.322080024933342
      }
    },
    {
      "case": "missing_fundamental_150_16000",
      "kind": "known_periodic",
      "method": "llsm_world_dio",
      "base_method": "world_harvest",
      "decoder_family": "LLSM layer0",
      "f0_source": "WORLD DIO+StoneMask",
      "native_metadata": {
        "method": "llsm-layer0-czt-external-f0",
        "sample_rate": 16000,
        "input_samples": 19200,
        "output_samples": 19200,
        "native_output_samples": 19360,
        "trimmed_tail_samples": 160,
        "fixed_delay_samples": 0,
        "hop_seconds": 0.005,
        "seed": 0,
        "f0_refine": false,
        "native_rng_seed": 1,
        "rng": "libc srand/rand; same pinned runtime only",
        "normalization": "none",
        "residual_waveform_bypass": false,
        "noise_band_edges_hz": [
          2000,
          4000
        ]
      },
      "status": "measured",
      "seconds": 0.05124499099838431,
      "rtf": 0.04270415916532026,
      "output_sha256": "2a06791934e69af58774ef25df2c2ec2202877f0e1b8535f71a938287efdee8a",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 19200,
        "output_samples": 19200,
        "length_delta_samples": 0,
        "sample_rate": 16000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 80,
            "hop_samples": 20,
            "log_magnitude_mae_db": 23.23026708778867,
            "spectral_convergence": 0.6246037688424109,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.6784924591140252e-06
          },
          {
            "window_ms": 20,
            "window_samples": 320,
            "hop_samples": 80,
            "log_magnitude_mae_db": 31.586756394510836,
            "spectral_convergence": 0.31802618201424543,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 9.594546200812243e-07
          },
          {
            "window_ms": 80,
            "window_samples": 1280,
            "hop_samples": 320,
            "log_magnitude_mae_db": 39.50151822433617,
            "spectral_convergence": 0.5811416204928048,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 9.594546200811852e-07
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 2.061915115378003e-09,
              "output_power": 2.90023103612321e-05,
              "delta_db": 41.48161813388985,
              "reference_active": false
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.026039993468199775,
              "output_power": 0.026577035946518265,
              "delta_db": 0.08865672846752398,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.009394429724971783,
              "output_power": 0.009985752166356032,
              "delta_db": 0.26510361187800807,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.005733143649652568,
              "output_power": 0.0050147365412192306,
              "delta_db": -0.5814470212987739,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.0006884043848610362,
              "output_power": 0.00056682232647897,
              "delta_db": -0.8439667967470221,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 1.7542304123327258e-15,
              "output_power": 1.7323495752527577e-06,
              "delta_db": 62.386355339193884,
              "reference_active": false
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 4,
          "band_count": 6,
          "active_band_mae_db": 0.444793539597832,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.03298486785365206,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1280
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 113,
          "expected_voiced_frames": 113,
          "expected_unvoiced_frames": 0,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 0,
          "missing_voiced_frames": 113,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": null,
          "abs_error_cents_p95": null,
          "voiced_detection_rate": 0.0,
          "unvoiced_false_positive_rate": null,
          "score_status": "no_valid_voiced_frames",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -13.749440680515049,
        "output_peak": 0.8517085920465401,
        "reference_rms_dbfs": -13.7824255483687,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 31.43951390221189
      }
    },
    {
      "case": "harmonic_sweep_90_240_16000",
      "kind": "known_periodic_sweep",
      "method": "identity",
      "base_method": "world_harvest",
      "decoder_family": "none",
      "f0_source": null,
      "role": "measurement_sanity_only_not_a_vocoder",
      "status": "measured",
      "seconds": 3.302800178062171e-05,
      "rtf": 2.2018667853747804e-05,
      "output_sha256": "b0046cd362d6425b88edbecd2c3dc0c685fcbac11bb74e52814380a17276cca4",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 24000,
        "output_samples": 24000,
        "length_delta_samples": 0,
        "sample_rate": 16000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 80,
            "hop_samples": 20,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 3.554055357778171e-06
          },
          {
            "window_ms": 20,
            "window_samples": 320,
            "hop_samples": 80,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.813555167305629e-06
          },
          {
            "window_ms": 80,
            "window_samples": 1280,
            "hop_samples": 320,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.781870414968393e-06
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.04239313445922007,
              "output_power": 0.04239313445922007,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.031065774522381732,
              "output_power": 0.031065774522381732,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.003072858618483715,
              "output_power": 0.003072858618483715,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.000991118137064746,
              "output_power": 0.000991118137064746,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.00024487906219671575,
              "output_power": 0.00024487906219671575,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 1.1357525507446691e-05,
              "output_power": 1.1357525507446691e-05,
              "delta_db": 0.0,
              "reference_active": true
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 6,
          "band_count": 6,
          "active_band_mae_db": 0.0,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.0,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1280
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 143,
          "expected_voiced_frames": 143,
          "expected_unvoiced_frames": 0,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 143,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": 0.7523859558975469,
          "abs_error_cents_p95": 3.117145006558854,
          "voiced_detection_rate": 1.0,
          "unvoiced_false_positive_rate": null,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -11.091369618265535,
        "output_peak": 0.6,
        "reference_rms_dbfs": -11.091369618265535,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 0.0
      }
    },
    {
      "case": "harmonic_sweep_90_240_16000",
      "kind": "known_periodic_sweep",
      "method": "world_dio",
      "base_method": "world_harvest",
      "decoder_family": "WORLD",
      "f0_source": "WORLD DIO+StoneMask",
      "native_length_policy": "C API synthesizes requested n_samples directly; no crop/pad",
      "feature_scalars": 309127,
      "feature_f0_voiced_fraction": 0.9966777408637874,
      "status": "measured",
      "seconds": 0.14194590400074958,
      "rtf": 0.09463060266716639,
      "output_sha256": "012953b7ce94148b91a150af36a9f0e6ef3f22085263671ff1e8648555d3bdcd",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 24000,
        "output_samples": 24000,
        "length_delta_samples": 0,
        "sample_rate": 16000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 80,
            "hop_samples": 20,
            "log_magnitude_mae_db": 5.919634343025783,
            "spectral_convergence": 0.3947745715372139,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 3.554055357778171e-06
          },
          {
            "window_ms": 20,
            "window_samples": 320,
            "hop_samples": 80,
            "log_magnitude_mae_db": 1.5600179101448717,
            "spectral_convergence": 0.13529051974251052,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.813555167305629e-06
          },
          {
            "window_ms": 80,
            "window_samples": 1280,
            "hop_samples": 320,
            "log_magnitude_mae_db": 3.0406712668196243,
            "spectral_convergence": 0.08916413995771606,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.781870414968393e-06
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.04239313445922007,
              "output_power": 0.050466312836610724,
              "delta_db": 0.7570604694789228,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.031065774522381732,
              "output_power": 0.03509871325130988,
              "delta_db": 0.5300900937125244,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.003072858618483715,
              "output_power": 0.0029411984002616193,
              "delta_db": -0.19018257843139233,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.000991118137064746,
              "output_power": 0.0009545541990084626,
              "delta_db": -0.1632483121794717,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.00024487906219671575,
              "output_power": 0.0002461147230498184,
              "delta_db": 0.021859414073295103,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 1.1357525507446691e-05,
              "output_power": 1.8455403116741233e-05,
              "delta_db": 2.108398149670351,
              "reference_active": true
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 6,
          "band_count": 6,
          "active_band_mae_db": 0.6284731695909929,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.6205211718426127,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1280
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 143,
          "expected_voiced_frames": 143,
          "expected_unvoiced_frames": 0,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 143,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": 0.9510579929217611,
          "abs_error_cents_p95": 3.7477901748999254,
          "voiced_detection_rate": 1.0,
          "unvoiced_false_positive_rate": null,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -10.470848446422922,
        "output_peak": 0.6150200380895403,
        "reference_rms_dbfs": -11.091369618265535,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 3.5067745066634264
      }
    },
    {
      "case": "harmonic_sweep_90_240_16000",
      "kind": "known_periodic_sweep",
      "method": "world_harvest",
      "base_method": "world_harvest",
      "decoder_family": "WORLD",
      "f0_source": "WORLD Harvest",
      "native_length_policy": "C API synthesizes requested n_samples directly; no crop/pad",
      "feature_scalars": 309127,
      "feature_f0_voiced_fraction": 1.0,
      "status": "measured",
      "seconds": 0.30609401499896194,
      "rtf": 0.20406267666597463,
      "output_sha256": "57aae0656dd348b5254becfc3dc48d19704fdaa3e271f4afacd2e78f9773a586",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 24000,
        "output_samples": 24000,
        "length_delta_samples": 0,
        "sample_rate": 16000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 80,
            "hop_samples": 20,
            "log_magnitude_mae_db": 5.653476026021085,
            "spectral_convergence": 0.4048922945863681,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 3.554055357778171e-06
          },
          {
            "window_ms": 20,
            "window_samples": 320,
            "hop_samples": 80,
            "log_magnitude_mae_db": 1.546547306854441,
            "spectral_convergence": 0.11569540848127434,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.813555167305629e-06
          },
          {
            "window_ms": 80,
            "window_samples": 1280,
            "hop_samples": 320,
            "log_magnitude_mae_db": 3.0354889910687155,
            "spectral_convergence": 0.08581955098239721,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.781870414968393e-06
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.04239313445922007,
              "output_power": 0.050256854982175386,
              "delta_db": 0.7389977886736074,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.031065774522381732,
              "output_power": 0.03511245832860786,
              "delta_db": 0.5317905100895142,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.003072858618483715,
              "output_power": 0.002939359584169774,
              "delta_db": -0.1928986054140884,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.000991118137064746,
              "output_power": 0.0009551457332527117,
              "delta_db": -0.16055783644545135,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.00024487906219671575,
              "output_power": 0.00024590231322572914,
              "delta_db": 0.018109608134327892,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 1.1357525507446691e-05,
              "output_power": 1.8483140829452103e-05,
              "delta_db": 2.1149205171208387,
              "reference_active": true
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 6,
          "band_count": 6,
          "active_band_mae_db": 0.6262124776463046,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.6109683454702073,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1280
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 143,
          "expected_voiced_frames": 143,
          "expected_unvoiced_frames": 0,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 143,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": 1.0274396561362606,
          "abs_error_cents_p95": 3.9073359548537323,
          "voiced_detection_rate": 1.0,
          "unvoiced_false_positive_rate": null,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -10.480401272795328,
        "output_peak": 0.6223441675101593,
        "reference_rms_dbfs": -11.091369618265535,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 3.411837441314747
      }
    },
    {
      "case": "harmonic_sweep_90_240_16000",
      "kind": "known_periodic_sweep",
      "method": "llsm_world_dio",
      "base_method": "world_harvest",
      "decoder_family": "LLSM layer0",
      "f0_source": "WORLD DIO+StoneMask",
      "native_metadata": {
        "method": "llsm-layer0-czt-external-f0",
        "sample_rate": 16000,
        "input_samples": 24000,
        "output_samples": 24000,
        "native_output_samples": 24160,
        "trimmed_tail_samples": 160,
        "fixed_delay_samples": 0,
        "hop_seconds": 0.005,
        "seed": 0,
        "f0_refine": false,
        "native_rng_seed": 1,
        "rng": "libc srand/rand; same pinned runtime only",
        "normalization": "none",
        "residual_waveform_bypass": false,
        "noise_band_edges_hz": [
          2000,
          4000
        ]
      },
      "status": "measured",
      "seconds": 0.1054720920001273,
      "rtf": 0.07031472800008487,
      "output_sha256": "ef5b9ce040a5e17c8485ea82799b87a24b2c774824d2db0c758cef615cfaf991",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 24000,
        "output_samples": 24000,
        "length_delta_samples": 0,
        "sample_rate": 16000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 80,
            "hop_samples": 20,
            "log_magnitude_mae_db": 2.6884959265607344,
            "spectral_convergence": 0.02473632325094038,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 3.554055357778171e-06
          },
          {
            "window_ms": 20,
            "window_samples": 320,
            "hop_samples": 80,
            "log_magnitude_mae_db": 3.9517750174503132,
            "spectral_convergence": 0.021135912795537757,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.813555167305629e-06
          },
          {
            "window_ms": 80,
            "window_samples": 1280,
            "hop_samples": 320,
            "log_magnitude_mae_db": 2.951249514483558,
            "spectral_convergence": 0.01940819771633096,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.781870414968393e-06
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.04239313445922007,
              "output_power": 0.04180074490159014,
              "delta_db": -0.061115074765452394,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.031065774522381732,
              "output_power": 0.030619292402725894,
              "delta_db": -0.06287035641771196,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.003072858618483715,
              "output_power": 0.003028500897150445,
              "delta_db": -0.06314872274178726,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.000991118137064746,
              "output_power": 0.0009736974981550618,
              "delta_db": -0.07701369505357097,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.00024487906219671575,
              "output_power": 0.00024121257297052002,
              "delta_db": -0.06551712157585504,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 1.1357525507446691e-05,
              "output_power": 1.1137455209524374e-05,
              "delta_db": -0.08497750367270776,
              "reference_active": true
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 6,
          "band_count": 6,
          "active_band_mae_db": 0.06910707903784757,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": -0.06211600002338031,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1280
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 143,
          "expected_voiced_frames": 143,
          "expected_unvoiced_frames": 0,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 143,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": 0.77779804703422,
          "abs_error_cents_p95": 3.1960586143090493,
          "voiced_detection_rate": 1.0,
          "unvoiced_false_positive_rate": null,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -11.153485618288917,
        "output_peak": 0.6148053543702141,
        "reference_rms_dbfs": -11.091369618265535,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 3.197173486164869
      }
    },
    {
      "case": "pulse_iir_vowel_90_16000",
      "kind": "known_source_filter",
      "method": "identity",
      "base_method": "world_harvest",
      "decoder_family": "none",
      "f0_source": null,
      "role": "measurement_sanity_only_not_a_vocoder",
      "status": "measured",
      "seconds": 3.336999725433998e-05,
      "rtf": 2.7808331045283317e-05,
      "output_sha256": "918fbf0e9e3db9dfea818d2e22da9aa18e095ef4db16f49f656de6db74188916",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 19200,
        "output_samples": 19200,
        "length_delta_samples": 0,
        "sample_rate": 16000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 80,
            "hop_samples": 20,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.5440384220059523e-06
          },
          {
            "window_ms": 20,
            "window_samples": 320,
            "hop_samples": 80,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 7.568043564410838e-07
          },
          {
            "window_ms": 80,
            "window_samples": 1280,
            "hop_samples": 320,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 6.608045419880063e-07
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.0002523438933289186,
              "output_power": 0.0002523438933289186,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.0008649859170864208,
              "output_power": 0.0008649859170864208,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.01922676647982728,
              "output_power": 0.01922676647982728,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.0054264652782323,
              "output_power": 0.0054264652782323,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 2.7309008718690025e-05,
              "output_power": 2.7309008718690025e-05,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 7.940988985707968e-10,
              "output_power": 7.940988985707968e-10,
              "delta_db": 0.0,
              "reference_active": false
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 5,
          "band_count": 6,
          "active_band_mae_db": 0.0,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.0,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1280
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 113,
          "expected_voiced_frames": 113,
          "expected_unvoiced_frames": 0,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 113,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": 0.1281628933713823,
          "abs_error_cents_p95": 0.27157533602911393,
          "voiced_detection_rate": 1.0,
          "unvoiced_false_positive_rate": null,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -15.88416126976294,
        "output_peak": 0.5996924672494939,
        "reference_rms_dbfs": -15.88416126976294,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 0.0
      }
    },
    {
      "case": "pulse_iir_vowel_90_16000",
      "kind": "known_source_filter",
      "method": "world_dio",
      "base_method": "world_harvest",
      "decoder_family": "WORLD",
      "f0_source": "WORLD DIO+StoneMask",
      "native_length_policy": "C API synthesizes requested n_samples directly; no crop/pad",
      "feature_scalars": 247507,
      "feature_f0_voiced_fraction": 0.995850622406639,
      "status": "measured",
      "seconds": 0.12025442700178246,
      "rtf": 0.10021202250148539,
      "output_sha256": "5045607e78a683f8fadac7c6cf0d998144c0d3fc1ccdd52881a4b43c4b1fa541",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 19200,
        "output_samples": 19200,
        "length_delta_samples": 0,
        "sample_rate": 16000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 80,
            "hop_samples": 20,
            "log_magnitude_mae_db": 2.840088082110246,
            "spectral_convergence": 0.1296734059664473,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.5440384220059523e-06
          },
          {
            "window_ms": 20,
            "window_samples": 320,
            "hop_samples": 80,
            "log_magnitude_mae_db": 2.1556472651833043,
            "spectral_convergence": 0.11967355276637183,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 7.568043564410838e-07
          },
          {
            "window_ms": 80,
            "window_samples": 1280,
            "hop_samples": 320,
            "log_magnitude_mae_db": 1.4652517144640673,
            "spectral_convergence": 0.11367798784811944,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 6.608045419880063e-07
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.0002523438933289186,
              "output_power": 0.0001987657817094358,
              "delta_db": -1.0365117832062363,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.0008649859170864208,
              "output_power": 0.0008230500400210262,
              "delta_db": -0.21582796365374762,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.01922676647982728,
              "output_power": 0.022234101889852594,
              "delta_db": 0.6311333994592234,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.0054264652782323,
              "output_power": 0.006075034565325613,
              "delta_db": 0.49031724817757133,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 2.7309008718690025e-05,
              "output_power": 2.7960642305650473e-05,
              "delta_db": 0.10241207600405546,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 7.940988985707968e-10,
              "output_power": 1.042928489465499e-09,
              "delta_db": 1.1837993750670253,
              "reference_active": false
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 5,
          "band_count": 6,
          "active_band_mae_db": 0.4952404941001669,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.5615611320083836,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1280
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 113,
          "expected_voiced_frames": 113,
          "expected_unvoiced_frames": 0,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 113,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": 0.14090477798504453,
          "abs_error_cents_p95": 0.2646797207986585,
          "voiced_detection_rate": 1.0,
          "unvoiced_false_positive_rate": null,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -15.322600137754554,
        "output_peak": 0.6312697018631004,
        "reference_rms_dbfs": -15.88416126976294,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 2.1536623539192057
      }
    },
    {
      "case": "pulse_iir_vowel_90_16000",
      "kind": "known_source_filter",
      "method": "world_harvest",
      "base_method": "world_harvest",
      "decoder_family": "WORLD",
      "f0_source": "WORLD Harvest",
      "native_length_policy": "C API synthesizes requested n_samples directly; no crop/pad",
      "feature_scalars": 247507,
      "feature_f0_voiced_fraction": 1.0,
      "status": "measured",
      "seconds": 0.3731137270006002,
      "rtf": 0.3109281058338335,
      "output_sha256": "b5e7a77601f122567fb269a7de0dcc9257f537dc5b697da91a76a49a53d2f2cc",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 19200,
        "output_samples": 19200,
        "length_delta_samples": 0,
        "sample_rate": 16000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 80,
            "hop_samples": 20,
            "log_magnitude_mae_db": 3.175169518838053,
            "spectral_convergence": 0.1494517345401837,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.5440384220059523e-06
          },
          {
            "window_ms": 20,
            "window_samples": 320,
            "hop_samples": 80,
            "log_magnitude_mae_db": 2.152761557946726,
            "spectral_convergence": 0.11964094608158478,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 7.568043564410838e-07
          },
          {
            "window_ms": 80,
            "window_samples": 1280,
            "hop_samples": 320,
            "log_magnitude_mae_db": 1.7073054710720756,
            "spectral_convergence": 0.11319876113040046,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 6.608045419880063e-07
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.0002523438933289186,
              "output_power": 0.0001978650000641062,
              "delta_db": -1.056238198226609,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.0008649859170864208,
              "output_power": 0.0008232236577976388,
              "delta_db": -0.21491194048308512,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.01922676647982728,
              "output_power": 0.022215081319656986,
              "delta_db": 0.6274165576248648,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.0054264652782323,
              "output_power": 0.006074956054947324,
              "delta_db": 0.49026112200409666,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 2.7309008718690025e-05,
              "output_power": 2.797774579723087e-05,
              "delta_db": 0.10506783799435607,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 7.940988985707968e-10,
              "output_power": 1.0394058512204663e-09,
              "delta_db": 1.1691056365924393,
              "reference_active": false
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 5,
          "band_count": 6,
          "active_band_mae_db": 0.49877913126660234,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.5586298567655147,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1280
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 113,
          "expected_voiced_frames": 113,
          "expected_unvoiced_frames": 0,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 113,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": 0.13792961696372838,
          "abs_error_cents_p95": 0.2823687767683456,
          "voiced_detection_rate": 1.0,
          "unvoiced_false_positive_rate": null,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -15.325531412997424,
        "output_peak": 0.6309295885659116,
        "reference_rms_dbfs": -15.88416126976294,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 2.3450788492856183
      }
    },
    {
      "case": "pulse_iir_vowel_90_16000",
      "kind": "known_source_filter",
      "method": "llsm_world_dio",
      "base_method": "world_harvest",
      "decoder_family": "LLSM layer0",
      "f0_source": "WORLD DIO+StoneMask",
      "native_metadata": {
        "method": "llsm-layer0-czt-external-f0",
        "sample_rate": 16000,
        "input_samples": 19200,
        "output_samples": 19200,
        "native_output_samples": 19360,
        "trimmed_tail_samples": 160,
        "fixed_delay_samples": 0,
        "hop_seconds": 0.005,
        "seed": 0,
        "f0_refine": false,
        "native_rng_seed": 1,
        "rng": "libc srand/rand; same pinned runtime only",
        "normalization": "none",
        "residual_waveform_bypass": false,
        "noise_band_edges_hz": [
          2000,
          4000
        ]
      },
      "status": "measured",
      "seconds": 0.14107492100083618,
      "rtf": 0.11756243416736349,
      "output_sha256": "cd3a81595dc6dabc355e0bc66b4554a1a319f1086f4842cc129815279afef351",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 19200,
        "output_samples": 19200,
        "length_delta_samples": 0,
        "sample_rate": 16000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 80,
            "hop_samples": 20,
            "log_magnitude_mae_db": 6.836183084866398,
            "spectral_convergence": 0.07215424860650158,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.5440384220059523e-06
          },
          {
            "window_ms": 20,
            "window_samples": 320,
            "hop_samples": 80,
            "log_magnitude_mae_db": 6.602814952305789,
            "spectral_convergence": 0.04373678476316587,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 7.568043564410838e-07
          },
          {
            "window_ms": 80,
            "window_samples": 1280,
            "hop_samples": 320,
            "log_magnitude_mae_db": 6.730120938422446,
            "spectral_convergence": 0.05162116878534427,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 6.608045419880063e-07
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.0002523438933289186,
              "output_power": 0.0002487663374797258,
              "delta_db": -0.062011871494972406,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.0008649859170864208,
              "output_power": 0.0008523803769810551,
              "delta_db": -0.0637559365950409,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.01922676647982728,
              "output_power": 0.018914912346173277,
              "delta_db": -0.07101918514637345,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.0054264652782323,
              "output_power": 0.005352311741240876,
              "delta_db": -0.05975627838059285,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 2.7309008718690025e-05,
              "output_power": 2.6770197247533637e-05,
              "delta_db": -0.08654364946942936,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 7.940988985707968e-10,
              "output_power": 1.0672469896104575e-08,
              "delta_db": 11.283903448135337,
              "reference_active": false
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 5,
          "band_count": 6,
          "active_band_mae_db": 0.06861738421728178,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": -0.06833062043814114,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1280
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 113,
          "expected_voiced_frames": 113,
          "expected_unvoiced_frames": 0,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 113,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": 0.12255601278119864,
          "abs_error_cents_p95": 0.271229362251867,
          "voiced_detection_rate": 1.0,
          "unvoiced_false_positive_rate": null,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -15.95249189020108,
        "output_peak": 0.6170263387637078,
        "reference_rms_dbfs": -15.88416126976294,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 6.723039658531544
      }
    },
    {
      "case": "am_noise_6hz_16000",
      "kind": "known_unvoiced",
      "method": "identity",
      "base_method": "world_harvest",
      "decoder_family": "none",
      "f0_source": null,
      "role": "measurement_sanity_only_not_a_vocoder",
      "status": "measured",
      "seconds": 3.3348998840665445e-05,
      "rtf": 2.2232665893776964e-05,
      "output_sha256": "7456f44bcfef4d38052bf0b9b4c0d24787f876f97a1df0cdb30b4d3532fbcf41",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 24000,
        "output_samples": 24000,
        "length_delta_samples": 0,
        "sample_rate": 16000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 80,
            "hop_samples": 20,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 7.196453952249548e-07
          },
          {
            "window_ms": 20,
            "window_samples": 320,
            "hop_samples": 80,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 3.3844778753114973e-07
          },
          {
            "window_ms": 80,
            "window_samples": 1280,
            "hop_samples": 320,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.660282693918681e-07
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 1.7660251205809936e-06,
              "output_power": 1.7660251205809936e-06,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.00033661167637180005,
              "output_power": 0.00033661167637180005,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.0009012477313791158,
              "output_power": 0.0009012477313791158,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.001683090652131809,
              "output_power": 0.001683090652131809,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.0034291918023174467,
              "output_power": 0.0034291918023174467,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 0.0034051290715845775,
              "output_power": 0.0034051290715845775,
              "delta_db": 0.0,
              "reference_active": true
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 6,
          "band_count": 6,
          "active_band_mae_db": 0.0,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.0,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1280
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 143,
          "expected_voiced_frames": 0,
          "expected_unvoiced_frames": 143,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 0,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": null,
          "abs_error_cents_p95": null,
          "voiced_detection_rate": null,
          "unvoiced_false_positive_rate": 0.0,
          "score_status": "no_valid_voiced_frames",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -20.10682049932848,
        "output_peak": 0.6,
        "reference_rms_dbfs": -20.10682049932848,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 0.0
      }
    },
    {
      "case": "am_noise_6hz_16000",
      "kind": "known_unvoiced",
      "method": "world_dio",
      "base_method": "world_harvest",
      "decoder_family": "WORLD",
      "f0_source": "WORLD DIO+StoneMask",
      "native_length_policy": "C API synthesizes requested n_samples directly; no crop/pad",
      "feature_scalars": 309127,
      "feature_f0_voiced_fraction": 0.0,
      "status": "measured",
      "seconds": 0.07603156500044861,
      "rtf": 0.05068771000029907,
      "output_sha256": "93998b1eb04a102fe950f362c2d69796f1688caae83b8be6877a7cbf4feec975",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 24000,
        "output_samples": 24000,
        "length_delta_samples": 0,
        "sample_rate": 16000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 80,
            "hop_samples": 20,
            "log_magnitude_mae_db": 6.202999820422289,
            "spectral_convergence": 0.6394879523139545,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 7.196453952249548e-07
          },
          {
            "window_ms": 20,
            "window_samples": 320,
            "hop_samples": 80,
            "log_magnitude_mae_db": 6.734838220453556,
            "spectral_convergence": 0.652952276073854,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 3.3844778753114973e-07
          },
          {
            "window_ms": 80,
            "window_samples": 1280,
            "hop_samples": 320,
            "log_magnitude_mae_db": 7.033439121704974,
            "spectral_convergence": 0.6687050263201805,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.660282693918681e-07
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 1.7660251205809936e-06,
              "output_power": 5.2323428710830196e-05,
              "delta_db": 14.716993183579223,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.00033661167637180005,
              "output_power": 0.000368191325289008,
              "delta_db": 0.3894437547503803,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.0009012477313791158,
              "output_power": 0.0009374360083225113,
              "delta_db": 0.170974468839991,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.001683090652131809,
              "output_power": 0.0016929277180905678,
              "delta_db": 0.025309077654413866,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.0034291918023174467,
              "output_power": 0.003505105458633927,
              "delta_db": 0.0950931233279404,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 0.0034051290715845775,
              "output_power": 0.003945000037624338,
              "delta_db": 0.6391343317294313,
              "reference_active": true
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 6,
          "band_count": 6,
          "active_band_mae_db": 2.6728246566468967,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.3191204572817841,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1280
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 143,
          "expected_voiced_frames": 0,
          "expected_unvoiced_frames": 143,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 0,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": null,
          "abs_error_cents_p95": null,
          "voiced_detection_rate": null,
          "unvoiced_false_positive_rate": 0.0,
          "score_status": "no_valid_voiced_frames",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -19.787700042046698,
        "output_peak": 0.6540108151563976,
        "reference_rms_dbfs": -20.10682049932848,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 6.65709238752694
      }
    },
    {
      "case": "am_noise_6hz_16000",
      "kind": "known_unvoiced",
      "method": "world_harvest",
      "base_method": "world_harvest",
      "decoder_family": "WORLD",
      "f0_source": "WORLD Harvest",
      "native_length_policy": "C API synthesizes requested n_samples directly; no crop/pad",
      "feature_scalars": 309127,
      "feature_f0_voiced_fraction": 0.0,
      "status": "measured",
      "seconds": 0.1858370890004153,
      "rtf": 0.12389139266694353,
      "output_sha256": "93998b1eb04a102fe950f362c2d69796f1688caae83b8be6877a7cbf4feec975",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 24000,
        "output_samples": 24000,
        "length_delta_samples": 0,
        "sample_rate": 16000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 80,
            "hop_samples": 20,
            "log_magnitude_mae_db": 6.202999820422289,
            "spectral_convergence": 0.6394879523139545,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 7.196453952249548e-07
          },
          {
            "window_ms": 20,
            "window_samples": 320,
            "hop_samples": 80,
            "log_magnitude_mae_db": 6.734838220453556,
            "spectral_convergence": 0.652952276073854,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 3.3844778753114973e-07
          },
          {
            "window_ms": 80,
            "window_samples": 1280,
            "hop_samples": 320,
            "log_magnitude_mae_db": 7.033439121704974,
            "spectral_convergence": 0.6687050263201805,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.660282693918681e-07
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 1.7660251205809936e-06,
              "output_power": 5.2323428710830196e-05,
              "delta_db": 14.716993183579223,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.00033661167637180005,
              "output_power": 0.000368191325289008,
              "delta_db": 0.3894437547503803,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.0009012477313791158,
              "output_power": 0.0009374360083225113,
              "delta_db": 0.170974468839991,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.001683090652131809,
              "output_power": 0.0016929277180905678,
              "delta_db": 0.025309077654413866,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.0034291918023174467,
              "output_power": 0.003505105458633927,
              "delta_db": 0.0950931233279404,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 0.0034051290715845775,
              "output_power": 0.003945000037624338,
              "delta_db": 0.6391343317294313,
              "reference_active": true
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 6,
          "band_count": 6,
          "active_band_mae_db": 2.6728246566468967,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.3191204572817841,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1280
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 143,
          "expected_voiced_frames": 0,
          "expected_unvoiced_frames": 143,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 0,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": null,
          "abs_error_cents_p95": null,
          "voiced_detection_rate": null,
          "unvoiced_false_positive_rate": 0.0,
          "score_status": "no_valid_voiced_frames",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -19.787700042046698,
        "output_peak": 0.6540108151563976,
        "reference_rms_dbfs": -20.10682049932848,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 6.65709238752694
      }
    },
    {
      "case": "am_noise_6hz_16000",
      "kind": "known_unvoiced",
      "method": "llsm_world_dio",
      "base_method": "world_harvest",
      "decoder_family": "LLSM layer0",
      "f0_source": "WORLD DIO+StoneMask",
      "native_metadata": {
        "method": "llsm-layer0-czt-external-f0",
        "sample_rate": 16000,
        "input_samples": 24000,
        "output_samples": 24000,
        "native_output_samples": 24160,
        "trimmed_tail_samples": 160,
        "fixed_delay_samples": 0,
        "hop_seconds": 0.005,
        "seed": 0,
        "f0_refine": false,
        "native_rng_seed": 1,
        "rng": "libc srand/rand; same pinned runtime only",
        "normalization": "none",
        "residual_waveform_bypass": false,
        "noise_band_edges_hz": [
          2000,
          4000
        ]
      },
      "status": "measured",
      "seconds": 0.027253296997514553,
      "rtf": 0.018168864665009703,
      "output_sha256": "08eeb71c2d75d25b8e8ce27d3be00924b27749b585d93283e99a759b12b15876",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 24000,
        "output_samples": 24000,
        "length_delta_samples": 0,
        "sample_rate": 16000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 80,
            "hop_samples": 20,
            "log_magnitude_mae_db": 6.304023745946637,
            "spectral_convergence": 0.5506952280394816,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 7.196453952249548e-07
          },
          {
            "window_ms": 20,
            "window_samples": 320,
            "hop_samples": 80,
            "log_magnitude_mae_db": 6.863334700970462,
            "spectral_convergence": 0.5067435854892524,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 3.3844778753114973e-07
          },
          {
            "window_ms": 80,
            "window_samples": 1280,
            "hop_samples": 320,
            "log_magnitude_mae_db": 7.679920883180807,
            "spectral_convergence": 0.602216550991078,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.660282693918681e-07
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 1.7660251205809936e-06,
              "output_power": 3.868785954052476e-06,
              "delta_db": 3.405778255939842,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.00033661167637180005,
              "output_power": 0.0003281736226683925,
              "delta_db": -0.11025505487616889,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.0009012477313791158,
              "output_power": 0.0010062411819454858,
              "delta_db": 0.47857902990623236,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.001683090652131809,
              "output_power": 0.001773365369833712,
              "delta_db": 0.22690715405590378,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.0034291918023174467,
              "output_power": 0.003566637929786516,
              "delta_db": 0.1706724696105001,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 0.0034051290715845775,
              "output_power": 0.00359427368462015,
              "delta_db": 0.2347756470783807,
              "reference_active": true
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 6,
          "band_count": 6,
          "active_band_mae_db": 0.7711612685778381,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.22360760803961172,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1280
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 143,
          "expected_voiced_frames": 0,
          "expected_unvoiced_frames": 143,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 0,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": null,
          "abs_error_cents_p95": null,
          "voiced_detection_rate": null,
          "unvoiced_false_positive_rate": 0.0,
          "score_status": "no_valid_voiced_frames",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -19.88321289128887,
        "output_peak": 0.5241812825093984,
        "reference_rms_dbfs": -20.10682049932848,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 6.949093110032635
      }
    },
    {
      "case": "voiced_unvoiced_boundaries_16000",
      "kind": "known_mixed",
      "method": "identity",
      "base_method": "world_harvest",
      "decoder_family": "none",
      "f0_source": null,
      "role": "measurement_sanity_only_not_a_vocoder",
      "status": "measured",
      "seconds": 3.386000025784597e-05,
      "rtf": 2.116250016115373e-05,
      "output_sha256": "f93b9dd93f4c79d60977d6a075b182316fa6d9847f9c7914ef85ce60b55c60cf",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 25600,
        "output_samples": 25600,
        "length_delta_samples": 0,
        "sample_rate": 16000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 80,
            "hop_samples": 20,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.1356494948447747e-06
          },
          {
            "window_ms": 20,
            "window_samples": 320,
            "hop_samples": 80,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 8.004148315506265e-07
          },
          {
            "window_ms": 80,
            "window_samples": 1280,
            "hop_samples": 320,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 7.980781269652513e-07
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.010527047873563372,
              "output_power": 0.010527047873563372,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.001819280533181824,
              "output_power": 0.001819280533181824,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.0015803116136899817,
              "output_power": 0.0015803116136899817,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.0016111355972958136,
              "output_power": 0.0016111355972958136,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.002553265304867968,
              "output_power": 0.002553265304867968,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 0.0022722881628369244,
              "output_power": 0.0022722881628369244,
              "delta_db": 0.0,
              "reference_active": true
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 6,
          "band_count": 6,
          "active_band_mae_db": 0.0,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.0,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1280
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 153,
          "expected_voiced_frames": 96,
          "expected_unvoiced_frames": 43,
          "boundary_frames": 14,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 96,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": 0.11526563854894027,
          "abs_error_cents_p95": 0.11667414067294324,
          "voiced_detection_rate": 1.0,
          "unvoiced_false_positive_rate": 0.0,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -16.911512201837546,
        "output_peak": 0.6,
        "reference_rms_dbfs": -16.911512201837546,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 0.0
      }
    },
    {
      "case": "voiced_unvoiced_boundaries_16000",
      "kind": "known_mixed",
      "method": "world_dio",
      "base_method": "world_harvest",
      "decoder_family": "WORLD",
      "f0_source": "WORLD DIO+StoneMask",
      "native_length_policy": "C API synthesizes requested n_samples directly; no crop/pad",
      "feature_scalars": 329667,
      "feature_f0_voiced_fraction": 0.6978193146417445,
      "status": "measured",
      "seconds": 0.12753783900188864,
      "rtf": 0.0797111493761804,
      "output_sha256": "26333cbb035f835f764acea31cb2c7d4a7f6e561fd93155125dbcf882cbada02",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 25600,
        "output_samples": 25600,
        "length_delta_samples": 0,
        "sample_rate": 16000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 80,
            "hop_samples": 20,
            "log_magnitude_mae_db": 7.167284436525816,
            "spectral_convergence": 0.585580664528347,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.1356494948447747e-06
          },
          {
            "window_ms": 20,
            "window_samples": 320,
            "hop_samples": 80,
            "log_magnitude_mae_db": 3.534350148194358,
            "spectral_convergence": 0.37945146402015567,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 8.004148315506265e-07
          },
          {
            "window_ms": 80,
            "window_samples": 1280,
            "hop_samples": 320,
            "log_magnitude_mae_db": 6.510907717642836,
            "spectral_convergence": 0.38449820217388764,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 7.980781269652513e-07
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.010527047873563372,
              "output_power": 0.01225204225733211,
              "delta_db": 0.6590188805162777,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.001819280533181824,
              "output_power": 0.0018352582945371052,
              "delta_db": 0.03797523096596293,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.0015803116136899817,
              "output_power": 0.0015512992945633476,
              "delta_db": -0.08047136739739309,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.0016111355972958136,
              "output_power": 0.001707882333965792,
              "delta_db": 0.2532585299610489,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.002553265304867968,
              "output_power": 0.002592266061611544,
              "delta_db": 0.06583630184875633,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 0.0022722881628369244,
              "output_power": 0.002527178870454917,
              "delta_db": 0.4617257572428768,
              "reference_active": true
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 6,
          "band_count": 6,
          "active_band_mae_db": 0.25971434465538595,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.426755657266196,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1280
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 153,
          "expected_voiced_frames": 96,
          "expected_unvoiced_frames": 43,
          "boundary_frames": 14,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 96,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": 0.10145877749614511,
          "abs_error_cents_p95": 0.3616285346987342,
          "voiced_detection_rate": 1.0,
          "unvoiced_false_positive_rate": 0.0,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -16.484756544571347,
        "output_peak": 0.6440308040510229,
        "reference_rms_dbfs": -16.911512201837546,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 5.737514100787671
      }
    },
    {
      "case": "voiced_unvoiced_boundaries_16000",
      "kind": "known_mixed",
      "method": "world_harvest",
      "base_method": "world_harvest",
      "decoder_family": "WORLD",
      "f0_source": "WORLD Harvest",
      "native_length_policy": "C API synthesizes requested n_samples directly; no crop/pad",
      "feature_scalars": 329667,
      "feature_f0_voiced_fraction": 0.6978193146417445,
      "status": "measured",
      "seconds": 0.3374730780014943,
      "rtf": 0.21092067375093393,
      "output_sha256": "efad7719f5b357cdd0ddfd79a15226ac535bdf9c517417834a663b8e689f7081",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 25600,
        "output_samples": 25600,
        "length_delta_samples": 0,
        "sample_rate": 16000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 80,
            "hop_samples": 20,
            "log_magnitude_mae_db": 4.866239158325298,
            "spectral_convergence": 0.46875393210735616,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.1356494948447747e-06
          },
          {
            "window_ms": 20,
            "window_samples": 320,
            "hop_samples": 80,
            "log_magnitude_mae_db": 3.4688982331113345,
            "spectral_convergence": 0.3813210492257931,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 8.004148315506265e-07
          },
          {
            "window_ms": 80,
            "window_samples": 1280,
            "hop_samples": 320,
            "log_magnitude_mae_db": 6.391675911135797,
            "spectral_convergence": 0.38472738327617173,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 7.980781269652513e-07
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.010527047873563372,
              "output_power": 0.012343406010356564,
              "delta_db": 0.6912841646122634,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.001819280533181824,
              "output_power": 0.0018709554113954443,
              "delta_db": 0.12163765052478648,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.0015803116136899817,
              "output_power": 0.00155314652000522,
              "delta_db": -0.07530303811201235,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.0016111355972958136,
              "output_power": 0.0016747835237306233,
              "delta_db": 0.16826586423494824,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.002553265304867968,
              "output_power": 0.00254435132187413,
              "delta_db": -0.015188657191613221,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 0.0022722881628369244,
              "output_power": 0.002605577989260805,
              "delta_db": 0.594406707640666,
              "reference_active": true
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 6,
          "band_count": 6,
          "active_band_mae_db": 0.27768101371938164,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.45110143606478503,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1280
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 153,
          "expected_voiced_frames": 96,
          "expected_unvoiced_frames": 43,
          "boundary_frames": 14,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 96,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": 0.12145776258880056,
          "abs_error_cents_p95": 0.43879865620241676,
          "voiced_detection_rate": 1.0,
          "unvoiced_false_positive_rate": 0.0,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -16.460410765772757,
        "output_peak": 0.6005543002520913,
        "reference_rms_dbfs": -16.911512201837546,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 4.908937767524143
      }
    },
    {
      "case": "voiced_unvoiced_boundaries_16000",
      "kind": "known_mixed",
      "method": "llsm_world_dio",
      "base_method": "world_harvest",
      "decoder_family": "LLSM layer0",
      "f0_source": "WORLD DIO+StoneMask",
      "native_metadata": {
        "method": "llsm-layer0-czt-external-f0",
        "sample_rate": 16000,
        "input_samples": 25600,
        "output_samples": 25600,
        "native_output_samples": 25760,
        "trimmed_tail_samples": 160,
        "fixed_delay_samples": 0,
        "hop_seconds": 0.005,
        "seed": 0,
        "f0_refine": false,
        "native_rng_seed": 1,
        "rng": "libc srand/rand; same pinned runtime only",
        "normalization": "none",
        "residual_waveform_bypass": false,
        "noise_band_edges_hz": [
          2000,
          4000
        ]
      },
      "status": "measured",
      "seconds": 0.06364560300062294,
      "rtf": 0.03977850187538934,
      "output_sha256": "993644abb0a1c731da8a613f2bb6018e3f9151763587282f8b3f158c497af4da",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 25600,
        "output_samples": 25600,
        "length_delta_samples": 0,
        "sample_rate": 16000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 80,
            "hop_samples": 20,
            "log_magnitude_mae_db": 4.59623457679724,
            "spectral_convergence": 0.3015085494058073,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.1356494948447747e-06
          },
          {
            "window_ms": 20,
            "window_samples": 320,
            "hop_samples": 80,
            "log_magnitude_mae_db": 4.401257095807062,
            "spectral_convergence": 0.28848202652999494,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 8.004148315506265e-07
          },
          {
            "window_ms": 80,
            "window_samples": 1280,
            "hop_samples": 320,
            "log_magnitude_mae_db": 4.451686804107024,
            "spectral_convergence": 0.3537767793818228,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 7.980781269652513e-07
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.010527047873563372,
              "output_power": 0.010362866090088971,
              "delta_db": -0.06826711771139705,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.001819280533181824,
              "output_power": 0.0017885171444693344,
              "delta_db": -0.0740656487620515,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.0015803116136899817,
              "output_power": 0.0016049133333037135,
              "delta_db": 0.06708853358862468,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.0016111355972958136,
              "output_power": 0.0016421367298984405,
              "delta_db": 0.0827722183435753,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.002553265304867968,
              "output_power": 0.0027240543465229684,
              "delta_db": 0.28119823913355874,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 0.0022722881628369244,
              "output_power": 0.002383135478429164,
              "delta_db": 0.20685326089384673,
              "reference_active": true
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 6,
          "band_count": 6,
          "active_band_mae_db": 0.130040836405509,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.030241913026893157,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1280
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 153,
          "expected_voiced_frames": 96,
          "expected_unvoiced_frames": 43,
          "boundary_frames": 14,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 96,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": 0.1139780683793023,
          "abs_error_cents_p95": 0.23996599555371914,
          "voiced_detection_rate": 1.0,
          "unvoiced_false_positive_rate": 0.0,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -16.88127028881065,
        "output_peak": 0.5731417097989709,
        "reference_rms_dbfs": -16.911512201837546,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 4.483059492237108
      }
    },
    {
      "case": "silence_16000",
      "kind": "silence",
      "method": "identity",
      "base_method": "world_harvest",
      "decoder_family": "none",
      "f0_source": null,
      "role": "measurement_sanity_only_not_a_vocoder",
      "status": "measured",
      "seconds": 1.5502999303862453e-05,
      "rtf": 1.9378749129828066e-05,
      "output_sha256": "f627ca4c2c322f15db26152df306bd4f983f0146409b81a4341b9b340c365a16",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 12800,
        "output_samples": 12800,
        "length_delta_samples": 0,
        "sample_rate": 16000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 80,
            "hop_samples": 20,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": null,
            "spectral_convergence_status": "zero_reference_energy",
            "amplitude_floor": 1e-10
          },
          {
            "window_ms": 20,
            "window_samples": 320,
            "hop_samples": 80,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": null,
            "spectral_convergence_status": "zero_reference_energy",
            "amplitude_floor": 1e-10
          },
          {
            "window_ms": 80,
            "window_samples": 1280,
            "hop_samples": 320,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": null,
            "spectral_convergence_status": "zero_reference_energy",
            "amplitude_floor": 1e-10
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.0,
              "output_power": 0.0,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.0,
              "output_power": 0.0,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.0,
              "output_power": 0.0,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.0,
              "output_power": 0.0,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.0,
              "output_power": 0.0,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 0.0,
              "output_power": 0.0,
              "delta_db": 0.0,
              "reference_active": false
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 0,
          "band_count": 6,
          "active_band_mae_db": null,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "no_active_reference_bands"
        },
        "rms_gain_error_db": null,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1280
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 73,
          "expected_voiced_frames": 0,
          "expected_unvoiced_frames": 73,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 0,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": null,
          "abs_error_cents_p95": null,
          "voiced_detection_rate": null,
          "unvoiced_false_positive_rate": 0.0,
          "score_status": "no_valid_voiced_frames",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -120.0,
        "output_peak": 0.0,
        "reference_rms_dbfs": -120.0,
        "rms_gain_status": "zero_reference_energy",
        "mr_stft_log_magnitude_mae_db": 0.0
      }
    },
    {
      "case": "silence_16000",
      "kind": "silence",
      "method": "world_dio",
      "base_method": "world_harvest",
      "decoder_family": "WORLD",
      "f0_source": "WORLD DIO+StoneMask",
      "native_length_policy": "C API synthesizes requested n_samples directly; no crop/pad",
      "feature_scalars": 165347,
      "feature_f0_voiced_fraction": 0.0,
      "status": "measured",
      "seconds": 0.05156849600098212,
      "rtf": 0.06446062000122765,
      "output_sha256": "8056870de5412715443e888091b3c167ec3b575416fd08f17be5384c1e135d90",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 12800,
        "output_samples": 12800,
        "length_delta_samples": 0,
        "sample_rate": 16000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 80,
            "hop_samples": 20,
            "log_magnitude_mae_db": 20.568133218191495,
            "spectral_convergence": null,
            "spectral_convergence_status": "zero_reference_energy",
            "amplitude_floor": 1e-10
          },
          {
            "window_ms": 20,
            "window_samples": 320,
            "hop_samples": 80,
            "log_magnitude_mae_db": 14.687218847121514,
            "spectral_convergence": null,
            "spectral_convergence_status": "zero_reference_energy",
            "amplitude_floor": 1e-10
          },
          {
            "window_ms": 80,
            "window_samples": 1280,
            "hop_samples": 320,
            "log_magnitude_mae_db": 8.986459599664917,
            "spectral_convergence": null,
            "spectral_convergence_status": "zero_reference_energy",
            "amplitude_floor": 1e-10
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.0,
              "output_power": 4.45979877582373e-19,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.0,
              "output_power": 3.632676376326916e-18,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.0,
              "output_power": 7.858360644110332e-18,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.0,
              "output_power": 1.633582482519164e-17,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.0,
              "output_power": 2.968310362281386e-17,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 0.0,
              "output_power": 6.150065865828698e-17,
              "delta_db": 0.0,
              "reference_active": false
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 0,
          "band_count": 6,
          "active_band_mae_db": null,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "no_active_reference_bands"
        },
        "rms_gain_error_db": null,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1280
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 73,
          "expected_voiced_frames": 0,
          "expected_unvoiced_frames": 73,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 0,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": null,
          "abs_error_cents_p95": null,
          "voiced_detection_rate": null,
          "unvoiced_false_positive_rate": 0.0,
          "score_status": "no_valid_voiced_frames",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -120.0,
        "output_peak": 4.1752123755771e-08,
        "reference_rms_dbfs": -120.0,
        "rms_gain_status": "zero_reference_energy",
        "mr_stft_log_magnitude_mae_db": 14.74727055499264
      }
    },
    {
      "case": "silence_16000",
      "kind": "silence",
      "method": "world_harvest",
      "base_method": "world_harvest",
      "decoder_family": "WORLD",
      "f0_source": "WORLD Harvest",
      "native_length_policy": "C API synthesizes requested n_samples directly; no crop/pad",
      "feature_scalars": 165347,
      "feature_f0_voiced_fraction": 0.0,
      "status": "measured",
      "seconds": 0.08606310799950734,
      "rtf": 0.10757888499938417,
      "output_sha256": "8056870de5412715443e888091b3c167ec3b575416fd08f17be5384c1e135d90",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 12800,
        "output_samples": 12800,
        "length_delta_samples": 0,
        "sample_rate": 16000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 80,
            "hop_samples": 20,
            "log_magnitude_mae_db": 20.568133218191495,
            "spectral_convergence": null,
            "spectral_convergence_status": "zero_reference_energy",
            "amplitude_floor": 1e-10
          },
          {
            "window_ms": 20,
            "window_samples": 320,
            "hop_samples": 80,
            "log_magnitude_mae_db": 14.687218847121514,
            "spectral_convergence": null,
            "spectral_convergence_status": "zero_reference_energy",
            "amplitude_floor": 1e-10
          },
          {
            "window_ms": 80,
            "window_samples": 1280,
            "hop_samples": 320,
            "log_magnitude_mae_db": 8.986459599664917,
            "spectral_convergence": null,
            "spectral_convergence_status": "zero_reference_energy",
            "amplitude_floor": 1e-10
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.0,
              "output_power": 4.45979877582373e-19,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.0,
              "output_power": 3.632676376326916e-18,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.0,
              "output_power": 7.858360644110332e-18,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.0,
              "output_power": 1.633582482519164e-17,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.0,
              "output_power": 2.968310362281386e-17,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 0.0,
              "output_power": 6.150065865828698e-17,
              "delta_db": 0.0,
              "reference_active": false
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 0,
          "band_count": 6,
          "active_band_mae_db": null,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "no_active_reference_bands"
        },
        "rms_gain_error_db": null,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1280
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 73,
          "expected_voiced_frames": 0,
          "expected_unvoiced_frames": 73,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 0,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": null,
          "abs_error_cents_p95": null,
          "voiced_detection_rate": null,
          "unvoiced_false_positive_rate": 0.0,
          "score_status": "no_valid_voiced_frames",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -120.0,
        "output_peak": 4.1752123755771e-08,
        "reference_rms_dbfs": -120.0,
        "rms_gain_status": "zero_reference_energy",
        "mr_stft_log_magnitude_mae_db": 14.74727055499264
      }
    },
    {
      "case": "silence_16000",
      "kind": "silence",
      "method": "llsm_world_dio",
      "base_method": "world_harvest",
      "decoder_family": "LLSM layer0",
      "f0_source": "WORLD DIO+StoneMask",
      "native_metadata": {
        "method": "llsm-layer0-czt-external-f0",
        "sample_rate": 16000,
        "input_samples": 12800,
        "output_samples": 12800,
        "native_output_samples": 12960,
        "trimmed_tail_samples": 160,
        "fixed_delay_samples": 0,
        "hop_seconds": 0.005,
        "seed": 0,
        "f0_refine": false,
        "native_rng_seed": 1,
        "rng": "libc srand/rand; same pinned runtime only",
        "normalization": "none",
        "residual_waveform_bypass": false,
        "noise_band_edges_hz": [
          2000,
          4000
        ]
      },
      "status": "measured",
      "seconds": 0.016534321002836805,
      "rtf": 0.020667901253546006,
      "output_sha256": "dd8c3de7322d3da37393277c5768fd53d51c8466e6eef7e5d2184937fe34d8e5",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 12800,
        "output_samples": 12800,
        "length_delta_samples": 0,
        "sample_rate": 16000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 80,
            "hop_samples": 20,
            "log_magnitude_mae_db": 79.5163802252567,
            "spectral_convergence": null,
            "spectral_convergence_status": "zero_reference_energy",
            "amplitude_floor": 1e-10
          },
          {
            "window_ms": 20,
            "window_samples": 320,
            "hop_samples": 80,
            "log_magnitude_mae_db": 73.37249698826778,
            "spectral_convergence": null,
            "spectral_convergence_status": "zero_reference_energy",
            "amplitude_floor": 1e-10
          },
          {
            "window_ms": 80,
            "window_samples": 1280,
            "hop_samples": 320,
            "log_magnitude_mae_db": 67.04735174508068,
            "spectral_convergence": null,
            "spectral_convergence_status": "zero_reference_energy",
            "amplitude_floor": 1e-10
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.0,
              "output_power": 1.7816256316610078e-12,
              "delta_db": 2.508164521225598,
              "reference_active": false
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.0,
              "output_power": 2.8333508684217504e-12,
              "delta_db": 4.52300358771774,
              "reference_active": false
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.0,
              "output_power": 5.243980061558703e-12,
              "delta_db": 7.196610317649013,
              "reference_active": false
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.0,
              "output_power": 9.896580179373918e-12,
              "delta_db": 9.95485147546158,
              "reference_active": false
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.0,
              "output_power": 1.9318360091023922e-11,
              "delta_db": 12.859702569838605,
              "reference_active": false
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 0.0,
              "output_power": 3.9309980613674975e-11,
              "delta_db": 15.945028296411001,
              "reference_active": false
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 0,
          "band_count": 6,
          "active_band_mae_db": null,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "no_active_reference_bands"
        },
        "rms_gain_error_db": null,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1280
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 73,
          "expected_voiced_frames": 0,
          "expected_unvoiced_frames": 73,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 0,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": null,
          "abs_error_cents_p95": null,
          "voiced_detection_rate": null,
          "unvoiced_false_positive_rate": 0.0,
          "score_status": "no_valid_voiced_frames",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -101.05773256912696,
        "output_peak": 3.5992476350978346e-05,
        "reference_rms_dbfs": -120.0,
        "rms_gain_status": "zero_reference_energy",
        "mr_stft_log_magnitude_mae_db": 73.31207631953505
      }
    },
    {
      "case": "impulse_16000",
      "kind": "transient_diagnostic",
      "method": "identity",
      "base_method": "world_harvest",
      "decoder_family": "none",
      "f0_source": null,
      "role": "measurement_sanity_only_not_a_vocoder",
      "status": "measured",
      "seconds": 1.7626000044401735e-05,
      "rtf": 2.203250005550217e-05,
      "output_sha256": "ab0a2efbc74f17eeb85e5cd4666c6c977fe8f6e6e124336d269418550c417bca",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 12800,
        "output_samples": 12800,
        "length_delta_samples": 0,
        "sample_rate": 16000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 80,
            "hop_samples": 20,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.2500000000000002e-07
          },
          {
            "window_ms": 20,
            "window_samples": 320,
            "hop_samples": 80,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 3.1250000000000005e-08
          },
          {
            "window_ms": 80,
            "window_samples": 1280,
            "hop_samples": 320,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 7.812500000000001e-09
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 4.8675537109375e-07,
              "output_power": 4.8675537109375e-07,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 7.324218750000001e-07,
              "output_power": 7.324218750000001e-07,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 1.2207031250000002e-06,
              "output_power": 1.2207031250000002e-06,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 2.4414062500000005e-06,
              "output_power": 2.4414062500000005e-06,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 4.882812500000001e-06,
              "output_power": 4.882812500000001e-06,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 9.767150878906252e-06,
              "output_power": 9.767150878906252e-06,
              "delta_db": 0.0,
              "reference_active": true
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 6,
          "band_count": 6,
          "active_band_mae_db": 0.0,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.0,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1280
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 73,
          "expected_voiced_frames": 0,
          "expected_unvoiced_frames": 73,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 0,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": null,
          "abs_error_cents_p95": null,
          "voiced_detection_rate": null,
          "unvoiced_false_positive_rate": 0.0,
          "score_status": "no_valid_voiced_frames",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -47.092699609758306,
        "output_peak": 0.5,
        "reference_rms_dbfs": -47.092699609758306,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 0.0
      },
      "event": {
        "status": "peak_energy_diagnostic",
        "expected_s": 0.3,
        "detected_s": 0.2975625,
        "error_ms": -2.4374999999999813
      }
    },
    {
      "case": "impulse_16000",
      "kind": "transient_diagnostic",
      "method": "world_dio",
      "base_method": "world_harvest",
      "decoder_family": "WORLD",
      "f0_source": "WORLD DIO+StoneMask",
      "native_length_policy": "C API synthesizes requested n_samples directly; no crop/pad",
      "feature_scalars": 165347,
      "feature_f0_voiced_fraction": 0.0,
      "status": "measured",
      "seconds": 0.03446867299862788,
      "rtf": 0.04308584124828485,
      "output_sha256": "8744f0d4775b7a9c930f124e8ac76bfc18e64cd0b26cae0dab42f0e39e052c90",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 12800,
        "output_samples": 12800,
        "length_delta_samples": 0,
        "sample_rate": 16000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 80,
            "hop_samples": 20,
            "log_magnitude_mae_db": 1.1740483115704201,
            "spectral_convergence": 1.147226399358179,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.2500000000000002e-07
          },
          {
            "window_ms": 20,
            "window_samples": 320,
            "hop_samples": 80,
            "log_magnitude_mae_db": 1.3957710139890627,
            "spectral_convergence": 0.8411173081950141,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 3.1250000000000005e-08
          },
          {
            "window_ms": 80,
            "window_samples": 1280,
            "hop_samples": 320,
            "log_magnitude_mae_db": 3.2085156167397675,
            "spectral_convergence": 0.8020616946526515,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 7.812500000000001e-09
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 4.8675537109375e-07,
              "output_power": 1.4042785808498647e-07,
              "delta_db": -5.3985748073339215,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 7.324218750000001e-07,
              "output_power": 8.790839807795513e-07,
              "delta_db": 0.7926905938780724,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 1.2207031250000002e-06,
              "output_power": 2.7017920924719225e-06,
              "delta_db": 3.450418698994826,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 2.4414062500000005e-06,
              "output_power": 4.019255595781056e-06,
              "delta_db": 2.165055730470229,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 4.882812500000001e-06,
              "output_power": 1.3535874855416797e-05,
              "delta_db": 4.428162827909129,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 9.767150878906252e-06,
              "output_power": 2.2214684781638398e-05,
              "delta_db": 3.568722585665225,
              "reference_active": true
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 6,
          "band_count": 6,
          "active_band_mae_db": 3.3006042073752337,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 3.4767054455679642,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1280
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 73,
          "expected_voiced_frames": 0,
          "expected_unvoiced_frames": 73,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 0,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": null,
          "abs_error_cents_p95": null,
          "voiced_detection_rate": null,
          "unvoiced_false_positive_rate": 0.0,
          "score_status": "no_valid_voiced_frames",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -43.61599416419034,
        "output_peak": 0.1812799733453587,
        "reference_rms_dbfs": -47.092699609758306,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 1.9261116474330835
      },
      "event": {
        "status": "peak_energy_diagnostic",
        "expected_s": 0.3,
        "detected_s": 0.3016875,
        "error_ms": 1.6875000000000084
      }
    },
    {
      "case": "impulse_16000",
      "kind": "transient_diagnostic",
      "method": "world_harvest",
      "base_method": "world_harvest",
      "decoder_family": "WORLD",
      "f0_source": "WORLD Harvest",
      "native_length_policy": "C API synthesizes requested n_samples directly; no crop/pad",
      "feature_scalars": 165347,
      "feature_f0_voiced_fraction": 0.0,
      "status": "measured",
      "seconds": 0.06039619799776119,
      "rtf": 0.07549524749720149,
      "output_sha256": "8744f0d4775b7a9c930f124e8ac76bfc18e64cd0b26cae0dab42f0e39e052c90",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 12800,
        "output_samples": 12800,
        "length_delta_samples": 0,
        "sample_rate": 16000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 80,
            "hop_samples": 20,
            "log_magnitude_mae_db": 1.1740483115704201,
            "spectral_convergence": 1.147226399358179,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.2500000000000002e-07
          },
          {
            "window_ms": 20,
            "window_samples": 320,
            "hop_samples": 80,
            "log_magnitude_mae_db": 1.3957710139890627,
            "spectral_convergence": 0.8411173081950141,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 3.1250000000000005e-08
          },
          {
            "window_ms": 80,
            "window_samples": 1280,
            "hop_samples": 320,
            "log_magnitude_mae_db": 3.2085156167397675,
            "spectral_convergence": 0.8020616946526515,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 7.812500000000001e-09
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 4.8675537109375e-07,
              "output_power": 1.4042785808498647e-07,
              "delta_db": -5.3985748073339215,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 7.324218750000001e-07,
              "output_power": 8.790839807795513e-07,
              "delta_db": 0.7926905938780724,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 1.2207031250000002e-06,
              "output_power": 2.7017920924719225e-06,
              "delta_db": 3.450418698994826,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 2.4414062500000005e-06,
              "output_power": 4.019255595781056e-06,
              "delta_db": 2.165055730470229,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 4.882812500000001e-06,
              "output_power": 1.3535874855416797e-05,
              "delta_db": 4.428162827909129,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 9.767150878906252e-06,
              "output_power": 2.2214684781638398e-05,
              "delta_db": 3.568722585665225,
              "reference_active": true
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 6,
          "band_count": 6,
          "active_band_mae_db": 3.3006042073752337,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 3.4767054455679642,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1280
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 73,
          "expected_voiced_frames": 0,
          "expected_unvoiced_frames": 73,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 0,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": null,
          "abs_error_cents_p95": null,
          "voiced_detection_rate": null,
          "unvoiced_false_positive_rate": 0.0,
          "score_status": "no_valid_voiced_frames",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -43.61599416419034,
        "output_peak": 0.1812799733453587,
        "reference_rms_dbfs": -47.092699609758306,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 1.9261116474330835
      },
      "event": {
        "status": "peak_energy_diagnostic",
        "expected_s": 0.3,
        "detected_s": 0.3016875,
        "error_ms": 1.6875000000000084
      }
    },
    {
      "case": "impulse_16000",
      "kind": "transient_diagnostic",
      "method": "llsm_world_dio",
      "base_method": "world_harvest",
      "decoder_family": "LLSM layer0",
      "f0_source": "WORLD DIO+StoneMask",
      "native_metadata": {
        "method": "llsm-layer0-czt-external-f0",
        "sample_rate": 16000,
        "input_samples": 12800,
        "output_samples": 12800,
        "native_output_samples": 12960,
        "trimmed_tail_samples": 160,
        "fixed_delay_samples": 0,
        "hop_seconds": 0.005,
        "seed": 0,
        "f0_refine": false,
        "native_rng_seed": 1,
        "rng": "libc srand/rand; same pinned runtime only",
        "normalization": "none",
        "residual_waveform_bypass": false,
        "noise_band_edges_hz": [
          2000,
          4000
        ]
      },
      "status": "measured",
      "seconds": 0.012327726002695272,
      "rtf": 0.01540965750336909,
      "output_sha256": "21dab882db211fa63df954ee4561d0e3d0de3fd1d12015c1a82772e11596e7d0",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 12800,
        "output_samples": 12800,
        "length_delta_samples": 0,
        "sample_rate": 16000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 80,
            "hop_samples": 20,
            "log_magnitude_mae_db": 19.16472242571477,
            "spectral_convergence": 0.8323152591273402,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.2500000000000002e-07
          },
          {
            "window_ms": 20,
            "window_samples": 320,
            "hop_samples": 80,
            "log_magnitude_mae_db": 24.379315164310167,
            "spectral_convergence": 0.45846724259157073,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 3.1250000000000005e-08
          },
          {
            "window_ms": 80,
            "window_samples": 1280,
            "hop_samples": 320,
            "log_magnitude_mae_db": 28.840890587090787,
            "spectral_convergence": 0.43281407830682755,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 7.812500000000001e-09
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 4.8675537109375e-07,
              "output_power": 5.685262410341415e-07,
              "delta_db": 0.6743976245362611,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 7.324218750000001e-07,
              "output_power": 7.917997411724514e-07,
              "delta_db": 0.33854048699919637,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 1.2207031250000002e-06,
              "output_power": 1.1744048348182896e-06,
              "delta_db": -0.16792225878519268,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 2.4414062500000005e-06,
              "output_power": 2.7540371054852495e-06,
              "delta_db": 0.5232973523179238,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 4.882812500000001e-06,
              "output_power": 4.949372753515549e-06,
              "delta_db": 0.05880115490322532,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 9.767150878906252e-06,
              "output_power": 1.0537610160689922e-05,
              "delta_db": 0.3297423122010783,
              "reference_active": true
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 6,
          "band_count": 6,
          "active_band_mae_db": 0.34878353162381287,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.26826689140762683,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1280
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 73,
          "expected_voiced_frames": 0,
          "expected_unvoiced_frames": 73,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 0,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": null,
          "abs_error_cents_p95": null,
          "voiced_detection_rate": null,
          "unvoiced_false_positive_rate": 0.0,
          "score_status": "no_valid_voiced_frames",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -46.824432718350685,
        "output_peak": 0.13160645588552372,
        "reference_rms_dbfs": -47.092699609758306,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 24.128309392371907
      },
      "event": {
        "status": "peak_energy_diagnostic",
        "expected_s": 0.3,
        "detected_s": 0.300125,
        "error_ms": 0.12499999999998623
      }
    },
    {
      "case": "sine_120_24000",
      "kind": "known_periodic",
      "method": "identity",
      "base_method": "world_harvest",
      "decoder_family": "none",
      "f0_source": null,
      "role": "measurement_sanity_only_not_a_vocoder",
      "status": "measured",
      "seconds": 3.316800211905502e-05,
      "rtf": 2.7640001765879184e-05,
      "output_sha256": "7b28885047dd680d227a2c5ce0f276410e4a3cbdae2143222a80d250dc797866",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 28800,
        "output_samples": 28800,
        "length_delta_samples": 0,
        "sample_rate": 24000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 120,
            "hop_samples": 30,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 3.941805906784142e-06
          },
          {
            "window_ms": 20,
            "window_samples": 480,
            "hop_samples": 120,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 2.261829024122929e-06
          },
          {
            "window_ms": 80,
            "window_samples": 1920,
            "hop_samples": 480,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 2.2525420327602955e-06
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.1223983612665257,
              "output_power": 0.1223983612665257,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 4.368160051241552e-08,
              "output_power": 4.368160051241552e-08,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 1.2623987216046109e-11,
              "output_power": 1.2623987216046109e-11,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 1.9568859245163652e-13,
              "output_power": 1.9568859245163652e-13,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 4.937000892258482e-15,
              "output_power": 4.937000892258482e-15,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 1.415789296131094e-16,
              "output_power": 1.415789296131094e-16,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 8000.0,
              "high_hz": 12000.0,
              "reference_power": 2.279383746168836e-18,
              "output_power": 2.279383746168836e-18,
              "delta_db": 0.0,
              "reference_active": false
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 1,
          "band_count": 7,
          "active_band_mae_db": 0.0,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.0,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1920
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 113,
          "expected_voiced_frames": 113,
          "expected_unvoiced_frames": 0,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 113,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": 0.019681260388214012,
          "abs_error_cents_p95": 0.02114872971441477,
          "voiced_detection_rate": 1.0,
          "unvoiced_false_positive_rate": null,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -9.122242416771481,
        "output_peak": 0.5,
        "reference_rms_dbfs": -9.122242416771481,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 0.0
      }
    },
    {
      "case": "sine_120_24000",
      "kind": "known_periodic",
      "method": "world_dio",
      "base_method": "world_harvest",
      "decoder_family": "WORLD",
      "f0_source": "WORLD DIO+StoneMask",
      "native_length_policy": "C API synthesizes requested n_samples directly; no crop/pad",
      "feature_scalars": 247507,
      "feature_f0_voiced_fraction": 0.995850622406639,
      "status": "measured",
      "seconds": 0.14576811799997813,
      "rtf": 0.12147343166664845,
      "output_sha256": "3e66ed59ea5c205ea0ba70874b089a1558babaae3143423dc978fcb6d85b76c6",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 28800,
        "output_samples": 28800,
        "length_delta_samples": 0,
        "sample_rate": 24000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 120,
            "hop_samples": 30,
            "log_magnitude_mae_db": 11.711694579250032,
            "spectral_convergence": 0.6263105408984238,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 3.941805906784142e-06
          },
          {
            "window_ms": 20,
            "window_samples": 480,
            "hop_samples": 120,
            "log_magnitude_mae_db": 24.87665732207046,
            "spectral_convergence": 0.5623876257640894,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 2.261829024122929e-06
          },
          {
            "window_ms": 80,
            "window_samples": 1920,
            "hop_samples": 480,
            "log_magnitude_mae_db": 17.47859634749686,
            "spectral_convergence": 0.5616058236805531,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 2.2525420327602955e-06
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.1223983612665257,
              "output_power": 0.2961234886649103,
              "delta_db": 3.8369725392749228,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 4.368160051241552e-08,
              "output_power": 0.0002787785936649973,
              "delta_db": 38.049608801821705,
              "reference_active": false
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 1.2623987216046109e-11,
              "output_power": 1.928055766635418e-06,
              "delta_db": 51.839230451129445,
              "reference_active": false
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 1.9568859245163652e-13,
              "output_power": 9.033459854839152e-07,
              "delta_db": 59.558541188713875,
              "reference_active": false
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 4.937000892258482e-15,
              "output_power": 4.903718489790394e-07,
              "delta_db": 56.90525530466346,
              "reference_active": false
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 1.415789296131094e-16,
              "output_power": 2.7160649698343535e-07,
              "delta_db": 54.339401543062095,
              "reference_active": false
            },
            {
              "low_hz": 8000.0,
              "high_hz": 12000.0,
              "reference_power": 2.279383746168836e-18,
              "output_power": 1.3817736571410217e-07,
              "delta_db": 51.40436908808618,
              "reference_active": false
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 1,
          "band_count": 7,
          "active_band_mae_db": 3.8369725392749228,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 3.841112305469906,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1920
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 113,
          "expected_voiced_frames": 113,
          "expected_unvoiced_frames": 0,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 113,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": 1.7350101246818528,
          "abs_error_cents_p95": 3.2243842614911107,
          "voiced_detection_rate": 1.0,
          "unvoiced_false_positive_rate": null,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -5.281130111301576,
        "output_peak": 0.8087705674093618,
        "reference_rms_dbfs": -9.122242416771481,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 18.022316082939117
      }
    },
    {
      "case": "sine_120_24000",
      "kind": "known_periodic",
      "method": "world_harvest",
      "base_method": "world_harvest",
      "decoder_family": "WORLD",
      "f0_source": "WORLD Harvest",
      "native_length_policy": "C API synthesizes requested n_samples directly; no crop/pad",
      "feature_scalars": 247507,
      "feature_f0_voiced_fraction": 0.016597510373443983,
      "status": "measured",
      "seconds": 0.2024867889995221,
      "rtf": 0.1687389908329351,
      "output_sha256": "d12981dbf471b817e10615b2f5504b8f083a1dc9c5e0ca33a6e3d6ec037ef297",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 28800,
        "output_samples": 28800,
        "length_delta_samples": 0,
        "sample_rate": 24000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 120,
            "hop_samples": 30,
            "log_magnitude_mae_db": 3.3277619452687963,
            "spectral_convergence": 0.8088404626109441,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 3.941805906784142e-06
          },
          {
            "window_ms": 20,
            "window_samples": 480,
            "hop_samples": 120,
            "log_magnitude_mae_db": 7.264970930717285,
            "spectral_convergence": 1.0828768315155008,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 2.261829024122929e-06
          },
          {
            "window_ms": 80,
            "window_samples": 1920,
            "hop_samples": 480,
            "log_magnitude_mae_db": 8.394820118534126,
            "spectral_convergence": 1.2006559651525366,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 2.2525420327602955e-06
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.1223983612665257,
              "output_power": 0.013345898552427144,
              "delta_db": -9.624277840068139,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 4.368160051241552e-08,
              "output_power": 0.07090824636110038,
              "delta_db": 62.103982022045976,
              "reference_active": false
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 1.2623987216046109e-11,
              "output_power": 0.0012721034140415733,
              "delta_db": 80.03325872101468,
              "reference_active": false
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 1.9568859245163652e-13,
              "output_power": 6.217733311552755e-07,
              "delta_db": 57.936320905272325,
              "reference_active": false
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 4.937000892258482e-15,
              "output_power": 1.0540200503473655e-07,
              "delta_db": 50.22848872425293,
              "reference_active": false
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 1.415789296131094e-16,
              "output_power": 5.095475061147612e-08,
              "delta_db": 47.071846803575646,
              "reference_active": false
            },
            {
              "low_hz": 8000.0,
              "high_hz": 12000.0,
              "reference_power": 2.279383746168836e-18,
              "output_power": 2.5208095025494392e-08,
              "delta_db": 44.01540027303759,
              "reference_active": false
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 1,
          "band_count": 7,
          "active_band_mae_db": 9.624277840068139,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": -1.5567225726724752,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1920
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 113,
          "expected_voiced_frames": 113,
          "expected_unvoiced_frames": 0,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 0,
          "missing_voiced_frames": 113,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": null,
          "abs_error_cents_p95": null,
          "voiced_detection_rate": 0.0,
          "unvoiced_false_positive_rate": null,
          "score_status": "no_valid_voiced_frames",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -10.678964989443958,
        "output_peak": 1.4712038391995315,
        "reference_rms_dbfs": -9.122242416771481,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 6.3291843315067355
      }
    },
    {
      "case": "sine_120_24000",
      "kind": "known_periodic",
      "method": "llsm_world_dio",
      "base_method": "world_harvest",
      "decoder_family": "LLSM layer0",
      "f0_source": "WORLD DIO+StoneMask",
      "native_metadata": {
        "method": "llsm-layer0-czt-external-f0",
        "sample_rate": 24000,
        "input_samples": 28800,
        "output_samples": 28800,
        "native_output_samples": 29040,
        "trimmed_tail_samples": 240,
        "fixed_delay_samples": 0,
        "hop_seconds": 0.005,
        "seed": 0,
        "f0_refine": false,
        "native_rng_seed": 1,
        "rng": "libc srand/rand; same pinned runtime only",
        "normalization": "none",
        "residual_waveform_bypass": false,
        "noise_band_edges_hz": [
          2000,
          4000,
          8000
        ]
      },
      "status": "measured",
      "seconds": 0.15560356299829436,
      "rtf": 0.129669635831912,
      "output_sha256": "f1085ce3f2548b08b8910f4a8e137ebbf0e13af00ef66e5cb7d5e5a73931ea02",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 28800,
        "output_samples": 28800,
        "length_delta_samples": 0,
        "sample_rate": 24000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 120,
            "hop_samples": 30,
            "log_magnitude_mae_db": 0.6665850504896788,
            "spectral_convergence": 0.027388527281091937,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 3.941805906784142e-06
          },
          {
            "window_ms": 20,
            "window_samples": 480,
            "hop_samples": 120,
            "log_magnitude_mae_db": 1.3580182736619173,
            "spectral_convergence": 0.02407206622556001,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 2.261829024122929e-06
          },
          {
            "window_ms": 80,
            "window_samples": 1920,
            "hop_samples": 480,
            "log_magnitude_mae_db": 2.1720175265173975,
            "spectral_convergence": 0.021485954242478695,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 2.2525420327602955e-06
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.1223983612665257,
              "output_power": 0.12092439687741782,
              "delta_db": -0.052616733075792385,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 4.368160051241552e-08,
              "output_power": 3.750785492613371e-06,
              "delta_db": 19.33823684840946,
              "reference_active": false
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 1.2623987216046109e-11,
              "output_power": 2.6125446546072757e-07,
              "delta_db": 43.15867176241218,
              "reference_active": false
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 1.9568859245163652e-13,
              "output_power": 9.016044432689487e-08,
              "delta_db": 49.550160433246866,
              "reference_active": false
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 4.937000892258482e-15,
              "output_power": 6.101163672913803e-08,
              "delta_db": 47.85412675752894,
              "reference_active": false
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 1.415789296131094e-16,
              "output_power": 2.4514721819593763e-08,
              "delta_db": 43.89426969460604,
              "reference_active": false
            },
            {
              "low_hz": 8000.0,
              "high_hz": 12000.0,
              "reference_power": 2.279383746168836e-18,
              "output_power": 1.3372568621984748e-08,
              "delta_db": 41.26214835175979,
              "reference_active": false
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 1,
          "band_count": 7,
          "active_band_mae_db": 0.052616733075792385,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": -0.05246740548887709,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1920
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 113,
          "expected_voiced_frames": 113,
          "expected_unvoiced_frames": 0,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 113,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": 0.08213969285479367,
          "abs_error_cents_p95": 0.2495332429693091,
          "voiced_detection_rate": 1.0,
          "unvoiced_false_positive_rate": null,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -9.17470982226036,
        "output_peak": 0.5030757159949495,
        "reference_rms_dbfs": -9.122242416771481,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 1.3988736168896647
      }
    },
    {
      "case": "harmonic_110_24000",
      "kind": "known_periodic",
      "method": "identity",
      "base_method": "world_harvest",
      "decoder_family": "none",
      "f0_source": null,
      "role": "measurement_sanity_only_not_a_vocoder",
      "status": "measured",
      "seconds": 3.2477997592650354e-05,
      "rtf": 2.7064997993875295e-05,
      "output_sha256": "f6f5ba5df9c7eeb1962f80f195fe91c092ede7df3d3479c6a22e49d17d6a57d5",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 28800,
        "output_samples": 28800,
        "length_delta_samples": 0,
        "sample_rate": 24000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 120,
            "hop_samples": 30,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 2.9760446201103816e-06
          },
          {
            "window_ms": 20,
            "window_samples": 480,
            "hop_samples": 120,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.5995360553994829e-06
          },
          {
            "window_ms": 80,
            "window_samples": 1920,
            "hop_samples": 480,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.5800497103829576e-06
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.05147895748194521,
              "output_power": 0.05147895748194521,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.012842424267491583,
              "output_power": 0.012842424267491583,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.0019989077283542756,
              "output_power": 0.0019989077283542756,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.0005740371316749717,
              "output_power": 0.0005740371316749717,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.00020006846273392878,
              "output_power": 0.00020006846273392878,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 4.818816215187489e-05,
              "output_power": 4.818816215187489e-05,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 8000.0,
              "high_hz": 12000.0,
              "reference_power": 6.9343892095099854e-18,
              "output_power": 6.9343892095099854e-18,
              "delta_db": 0.0,
              "reference_active": false
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 6,
          "band_count": 7,
          "active_band_mae_db": 0.0,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.0,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1920
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 113,
          "expected_voiced_frames": 113,
          "expected_unvoiced_frames": 0,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 113,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": 0.02097575259089096,
          "abs_error_cents_p95": 0.02194761027132793,
          "voiced_detection_rate": 1.0,
          "unvoiced_false_positive_rate": null,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -11.730019537814442,
        "output_peak": 0.6,
        "reference_rms_dbfs": -11.730019537814442,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 0.0
      }
    },
    {
      "case": "harmonic_110_24000",
      "kind": "known_periodic",
      "method": "world_dio",
      "base_method": "world_harvest",
      "decoder_family": "WORLD",
      "f0_source": "WORLD DIO+StoneMask",
      "native_length_policy": "C API synthesizes requested n_samples directly; no crop/pad",
      "feature_scalars": 247507,
      "feature_f0_voiced_fraction": 0.995850622406639,
      "status": "measured",
      "seconds": 0.16032194100262132,
      "rtf": 0.13360161750218444,
      "output_sha256": "cceeb3a3432c8f47b07d606797598033ff456fe36c755614979126caa2c6ada0",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 28800,
        "output_samples": 28800,
        "length_delta_samples": 0,
        "sample_rate": 24000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 120,
            "hop_samples": 30,
            "log_magnitude_mae_db": 9.827018536536949,
            "spectral_convergence": 0.5460891828124997,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 2.9760446201103816e-06
          },
          {
            "window_ms": 20,
            "window_samples": 480,
            "hop_samples": 120,
            "log_magnitude_mae_db": 2.034989430547709,
            "spectral_convergence": 0.1447184664754995,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.5995360553994829e-06
          },
          {
            "window_ms": 80,
            "window_samples": 1920,
            "hop_samples": 480,
            "log_magnitude_mae_db": 2.9509768670277143,
            "spectral_convergence": 0.08272575556260603,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.5800497103829576e-06
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.05147895748194521,
              "output_power": 0.060780520920913704,
              "delta_db": 0.7213467461651928,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.012842424267491583,
              "output_power": 0.012560439805197363,
              "delta_db": -0.09642166807568993,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.0019989077283542756,
              "output_power": 0.0019056825767760728,
              "delta_db": -0.2074218376350217,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.0005740371316749717,
              "output_power": 0.0005475332138020175,
              "delta_db": -0.20529516746694026,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.00020006846273392878,
              "output_power": 0.00019110488283793843,
              "delta_db": -0.19906851495935918,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 4.818816215187489e-05,
              "output_power": 4.8168396196696345e-05,
              "delta_db": -0.0017817667071381499,
              "reference_active": true
            },
            {
              "low_hz": 8000.0,
              "high_hz": 12000.0,
              "reference_power": 6.9343892095099854e-18,
              "output_power": 1.4847527774416388e-09,
              "delta_db": 31.71654146359532,
              "reference_active": false
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 6,
          "band_count": 7,
          "active_band_mae_db": 0.2385559501682237,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.5400665803970699,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1920
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 113,
          "expected_voiced_frames": 113,
          "expected_unvoiced_frames": 0,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 113,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": 0.02166837887540465,
          "abs_error_cents_p95": 0.08653499731637962,
          "voiced_detection_rate": 1.0,
          "unvoiced_false_positive_rate": null,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -11.189952957417372,
        "output_peak": 0.5617255130809287,
        "reference_rms_dbfs": -11.730019537814442,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 4.937661611370791
      }
    },
    {
      "case": "harmonic_110_24000",
      "kind": "known_periodic",
      "method": "world_harvest",
      "base_method": "world_harvest",
      "decoder_family": "WORLD",
      "f0_source": "WORLD Harvest",
      "native_length_policy": "C API synthesizes requested n_samples directly; no crop/pad",
      "feature_scalars": 247507,
      "feature_f0_voiced_fraction": 1.0,
      "status": "measured",
      "seconds": 0.3162245940002322,
      "rtf": 0.2635204950001935,
      "output_sha256": "33b51322f80ce03467933c4706f0fb4698ba1952fc17b6e9b13a3d1a6e362d38",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 28800,
        "output_samples": 28800,
        "length_delta_samples": 0,
        "sample_rate": 24000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 120,
            "hop_samples": 30,
            "log_magnitude_mae_db": 9.969253292717525,
            "spectral_convergence": 0.5157747623602679,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 2.9760446201103816e-06
          },
          {
            "window_ms": 20,
            "window_samples": 480,
            "hop_samples": 120,
            "log_magnitude_mae_db": 2.086038204053871,
            "spectral_convergence": 0.11830436101617506,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.5995360553994829e-06
          },
          {
            "window_ms": 80,
            "window_samples": 1920,
            "hop_samples": 480,
            "log_magnitude_mae_db": 3.1619201225067908,
            "spectral_convergence": 0.07949782420638846,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.5800497103829576e-06
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.05147895748194521,
              "output_power": 0.06083897395013162,
              "delta_db": 0.72552137787559,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.012842424267491583,
              "output_power": 0.012597012328747043,
              "delta_db": -0.08379458941014425,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.0019989077283542756,
              "output_power": 0.0019118462693420483,
              "delta_db": -0.19339779169578003,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.0005740371316749717,
              "output_power": 0.0005479051630121262,
              "delta_db": -0.20234592816466165,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.00020006846273392878,
              "output_power": 0.00019136438981457653,
              "delta_db": -0.19317510216399592,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 4.818816215187489e-05,
              "output_power": 4.889927519794903e-05,
              "delta_db": 0.06362058846049157,
              "reference_active": true
            },
            {
              "low_hz": 8000.0,
              "high_hz": 12000.0,
              "reference_power": 6.9343892095099854e-18,
              "output_power": 2.362676895726519e-10,
              "delta_db": 23.73404334413832,
              "reference_active": false
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 6,
          "band_count": 7,
          "active_band_mae_db": 0.24364256296177725,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.545920192829333,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1920
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 113,
          "expected_voiced_frames": 113,
          "expected_unvoiced_frames": 0,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 113,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": 0.021094446453162708,
          "abs_error_cents_p95": 0.09457589510833073,
          "voiced_detection_rate": 1.0,
          "unvoiced_false_positive_rate": null,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -11.18409934498511,
        "output_peak": 0.5585038062361571,
        "reference_rms_dbfs": -11.730019537814442,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 5.072403873092729
      }
    },
    {
      "case": "harmonic_110_24000",
      "kind": "known_periodic",
      "method": "llsm_world_dio",
      "base_method": "world_harvest",
      "decoder_family": "LLSM layer0",
      "f0_source": "WORLD DIO+StoneMask",
      "native_metadata": {
        "method": "llsm-layer0-czt-external-f0",
        "sample_rate": 24000,
        "input_samples": 28800,
        "output_samples": 28800,
        "native_output_samples": 29040,
        "trimmed_tail_samples": 240,
        "fixed_delay_samples": 0,
        "hop_seconds": 0.005,
        "seed": 0,
        "f0_refine": false,
        "native_rng_seed": 1,
        "rng": "libc srand/rand; same pinned runtime only",
        "normalization": "none",
        "residual_waveform_bypass": false,
        "noise_band_edges_hz": [
          2000,
          4000,
          8000
        ]
      },
      "status": "measured",
      "seconds": 0.1624818430027517,
      "rtf": 0.13540153583562642,
      "output_sha256": "3c773c31e0e2cb3f1a644146528460a1757075105bbf15d7abd9400b6f64bc61",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 28800,
        "output_samples": 28800,
        "length_delta_samples": 0,
        "sample_rate": 24000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 120,
            "hop_samples": 30,
            "log_magnitude_mae_db": 0.5262261120886751,
            "spectral_convergence": 0.024805445065029286,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 2.9760446201103816e-06
          },
          {
            "window_ms": 20,
            "window_samples": 480,
            "hop_samples": 120,
            "log_magnitude_mae_db": 0.4421794062970221,
            "spectral_convergence": 0.02219663649137826,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.5995360553994829e-06
          },
          {
            "window_ms": 80,
            "window_samples": 1920,
            "hop_samples": 480,
            "log_magnitude_mae_db": 1.2338142388339368,
            "spectral_convergence": 0.018828410458106334,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.5800497103829576e-06
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.05147895748194521,
              "output_power": 0.051004445919060684,
              "delta_db": -0.040217092559247526,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.012842424267491583,
              "output_power": 0.012714000350397223,
              "delta_db": -0.043647942810219886,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.0019989077283542756,
              "output_power": 0.0019739634125703993,
              "delta_db": -0.05453648342783571,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.0005740371316749717,
              "output_power": 0.0005681749816085441,
              "delta_db": -0.04457879145065243,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.00020006846273392878,
              "output_power": 0.0001978034120397773,
              "delta_db": -0.04944856408658187,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 4.818816215187489e-05,
              "output_power": 4.7591177019877075e-05,
              "delta_db": -0.054139172054878226,
              "reference_active": true
            },
            {
              "low_hz": 8000.0,
              "high_hz": 12000.0,
              "reference_power": 6.9343892095099854e-18,
              "output_power": 3.824754389134036e-09,
              "delta_db": 35.82603551680854,
              "reference_active": false
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 6,
          "band_count": 7,
          "active_band_mae_db": 0.0477613410649026,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": -0.041373287254135034,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1920
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 113,
          "expected_voiced_frames": 113,
          "expected_unvoiced_frames": 0,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 113,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": 0.024158296619747492,
          "abs_error_cents_p95": 0.08754863336515295,
          "voiced_detection_rate": 1.0,
          "unvoiced_false_positive_rate": null,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -11.771392825068576,
        "output_peak": 0.6014983086518315,
        "reference_rms_dbfs": -11.730019537814442,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 0.7340732524065446
      }
    },
    {
      "case": "harmonic_220_24000",
      "kind": "known_periodic",
      "method": "identity",
      "base_method": "world_harvest",
      "decoder_family": "none",
      "f0_source": null,
      "role": "measurement_sanity_only_not_a_vocoder",
      "status": "measured",
      "seconds": 3.601299977162853e-05,
      "rtf": 3.0010833143023774e-05,
      "output_sha256": "a88eb27f28507262ed88f8b7904f31380699c6187a25f5f6f7f42a384598b46a",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 28800,
        "output_samples": 28800,
        "length_delta_samples": 0,
        "sample_rate": 24000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 120,
            "hop_samples": 30,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.8829075025078097e-06
          },
          {
            "window_ms": 20,
            "window_samples": 480,
            "hop_samples": 120,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.4859895249142301e-06
          },
          {
            "window_ms": 80,
            "window_samples": 1920,
            "hop_samples": 480,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.4840915451321505e-06
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 5.491151368241255e-05,
              "output_power": 5.491151368241255e-05,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.061842179029333574,
              "output_power": 0.061842179029333574,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.0044993993032403385,
              "output_power": 0.0044993993032403385,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.0020639838015985745,
              "output_power": 0.0020639838015985745,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.0005923905147946086,
              "output_power": 0.0005923905147946086,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 0.00014629106162114991,
              "output_power": 0.00014629106162114991,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 8000.0,
              "high_hz": 12000.0,
              "reference_power": 2.135938879727136e-18,
              "output_power": 2.135938879727136e-18,
              "delta_db": 0.0,
              "reference_active": false
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 6,
          "band_count": 7,
          "active_band_mae_db": 0.0,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.0,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1920
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 113,
          "expected_voiced_frames": 113,
          "expected_unvoiced_frames": 0,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 113,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": 0.0755472727480109,
          "abs_error_cents_p95": 0.07789108206093558,
          "voiced_detection_rate": 1.0,
          "unvoiced_false_positive_rate": null,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -11.598992073304835,
        "output_peak": 0.6,
        "reference_rms_dbfs": -11.598992073304835,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 0.0
      }
    },
    {
      "case": "harmonic_220_24000",
      "kind": "known_periodic",
      "method": "world_dio",
      "base_method": "world_harvest",
      "decoder_family": "WORLD",
      "f0_source": "WORLD DIO+StoneMask",
      "native_length_policy": "C API synthesizes requested n_samples directly; no crop/pad",
      "feature_scalars": 247507,
      "feature_f0_voiced_fraction": 0.995850622406639,
      "status": "measured",
      "seconds": 0.12319019999995362,
      "rtf": 0.10265849999996135,
      "output_sha256": "845fd8d45774b31e3233c283e3995b8853f9de27a379715397f1b33102cfc4a0",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 28800,
        "output_samples": 28800,
        "length_delta_samples": 0,
        "sample_rate": 24000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 120,
            "hop_samples": 30,
            "log_magnitude_mae_db": 4.769508566670964,
            "spectral_convergence": 0.5649345993060296,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.8829075025078097e-06
          },
          {
            "window_ms": 20,
            "window_samples": 480,
            "hop_samples": 120,
            "log_magnitude_mae_db": 1.4246125142162478,
            "spectral_convergence": 0.07988370851788024,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.4859895249142301e-06
          },
          {
            "window_ms": 80,
            "window_samples": 1920,
            "hop_samples": 480,
            "log_magnitude_mae_db": 6.900219629709501,
            "spectral_convergence": 0.07668265520192544,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.4840915451321505e-06
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 5.491151368241255e-05,
              "output_power": 9.149966554708902e-05,
              "delta_db": 2.2175609105049117,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.061842179029333574,
              "output_power": 0.07109408686190968,
              "delta_db": 0.6054869678859983,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.0044993993032403385,
              "output_power": 0.004299979117681015,
              "delta_db": -0.19688190243472084,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.0020639838015985745,
              "output_power": 0.0019850373319724303,
              "delta_db": -0.16937605755881394,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.0005923905147946086,
              "output_power": 0.0005707077170676538,
              "delta_db": -0.16194351006076185,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 0.00014629106162114991,
              "output_power": 0.00015583916311799305,
              "delta_db": 0.27458815749834065,
              "reference_active": true
            },
            {
              "low_hz": 8000.0,
              "high_hz": 12000.0,
              "reference_power": 2.135938879727136e-18,
              "output_power": 4.024305894553965e-11,
              "delta_db": 16.046909847883498,
              "reference_active": false
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 6,
          "band_count": 7,
          "active_band_mae_db": 0.6043062509905913,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.5309013166490175,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1920
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 113,
          "expected_voiced_frames": 113,
          "expected_unvoiced_frames": 0,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 113,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": 0.07484332733105892,
          "abs_error_cents_p95": 0.17175346121530508,
          "voiced_detection_rate": 1.0,
          "unvoiced_false_positive_rate": null,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -11.068090756655817,
        "output_peak": 0.5930312962653379,
        "reference_rms_dbfs": -11.598992073304835,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 4.364780236865571
      }
    },
    {
      "case": "harmonic_220_24000",
      "kind": "known_periodic",
      "method": "world_harvest",
      "base_method": "world_harvest",
      "decoder_family": "WORLD",
      "f0_source": "WORLD Harvest",
      "native_length_policy": "C API synthesizes requested n_samples directly; no crop/pad",
      "feature_scalars": 247507,
      "feature_f0_voiced_fraction": 1.0,
      "status": "measured",
      "seconds": 0.24192173600022215,
      "rtf": 0.2016014466668518,
      "output_sha256": "151d610ca3f8502ee1b5278bbfd38859c8928a51e7b5874a9e7c09a1c03c1ccd",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 28800,
        "output_samples": 28800,
        "length_delta_samples": 0,
        "sample_rate": 24000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 120,
            "hop_samples": 30,
            "log_magnitude_mae_db": 4.965234736890866,
            "spectral_convergence": 0.36298662742609594,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.8829075025078097e-06
          },
          {
            "window_ms": 20,
            "window_samples": 480,
            "hop_samples": 120,
            "log_magnitude_mae_db": 1.4493901372155968,
            "spectral_convergence": 0.07802952282476945,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.4859895249142301e-06
          },
          {
            "window_ms": 80,
            "window_samples": 1920,
            "hop_samples": 480,
            "log_magnitude_mae_db": 6.634863535136613,
            "spectral_convergence": 0.07640672960011378,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.4840915451321505e-06
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 5.491151368241255e-05,
              "output_power": 8.781279983978786e-05,
              "delta_db": 2.0389440893112,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.061842179029333574,
              "output_power": 0.07108642109535133,
              "delta_db": 0.6050186617634632,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.0044993993032403385,
              "output_power": 0.00429880047944142,
              "delta_db": -0.1980724808907455,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.0020639838015985745,
              "output_power": 0.0019842676619938916,
              "delta_db": -0.17106029915407286,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.0005923905147946086,
              "output_power": 0.0005703948282863442,
              "delta_db": -0.16432516936265285,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 0.00014629106162114991,
              "output_power": 0.00015374464073353305,
              "delta_db": 0.2158219441520476,
              "reference_active": true
            },
            {
              "low_hz": 8000.0,
              "high_hz": 12000.0,
              "reference_power": 2.135938879727136e-18,
              "output_power": 1.6282388066152707e-10,
              "delta_db": 22.117181012837488,
              "reference_active": false
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 6,
          "band_count": 7,
          "active_band_mae_db": 0.5655404407723637,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.5300288190571628,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1920
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 113,
          "expected_voiced_frames": 113,
          "expected_unvoiced_frames": 0,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 113,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": 0.051558193299894466,
          "abs_error_cents_p95": 0.1608966769951734,
          "voiced_detection_rate": 1.0,
          "unvoiced_false_positive_rate": null,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -11.06896325424767,
        "output_peak": 0.5953506384535437,
        "reference_rms_dbfs": -11.598992073304835,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 4.349829469747692
      }
    },
    {
      "case": "harmonic_220_24000",
      "kind": "known_periodic",
      "method": "llsm_world_dio",
      "base_method": "world_harvest",
      "decoder_family": "LLSM layer0",
      "f0_source": "WORLD DIO+StoneMask",
      "native_metadata": {
        "method": "llsm-layer0-czt-external-f0",
        "sample_rate": 24000,
        "input_samples": 28800,
        "output_samples": 28800,
        "native_output_samples": 29040,
        "trimmed_tail_samples": 240,
        "fixed_delay_samples": 0,
        "hop_seconds": 0.005,
        "seed": 0,
        "f0_refine": false,
        "native_rng_seed": 1,
        "rng": "libc srand/rand; same pinned runtime only",
        "normalization": "none",
        "residual_waveform_bypass": false,
        "noise_band_edges_hz": [
          2000,
          4000,
          8000
        ]
      },
      "status": "measured",
      "seconds": 0.10202345299694571,
      "rtf": 0.08501954416412143,
      "output_sha256": "9539d707a029d8d4b9bfdb5d9ebd3e0e493bcfa9f7f0eb172966e277fc1bff44",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 28800,
        "output_samples": 28800,
        "length_delta_samples": 0,
        "sample_rate": 24000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 120,
            "hop_samples": 30,
            "log_magnitude_mae_db": 0.3543804630118491,
            "spectral_convergence": 0.010999975925400881,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.8829075025078097e-06
          },
          {
            "window_ms": 20,
            "window_samples": 480,
            "hop_samples": 120,
            "log_magnitude_mae_db": 0.3962811200209913,
            "spectral_convergence": 0.009907260929993706,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.4859895249142301e-06
          },
          {
            "window_ms": 80,
            "window_samples": 1920,
            "hop_samples": 480,
            "log_magnitude_mae_db": 2.13335409366219,
            "spectral_convergence": 0.009213137016032526,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.4840915451321505e-06
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 5.491151368241255e-05,
              "output_power": 4.6097913337776756e-05,
              "delta_db": -0.7598214845350368,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.061842179029333574,
              "output_power": 0.06132575655267972,
              "delta_db": -0.03641869049135801,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.0044993993032403385,
              "output_power": 0.004466962822596603,
              "delta_db": -0.031421987669252756,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.0020639838015985745,
              "output_power": 0.0020465959830944565,
              "delta_db": -0.03674167180325782,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.0005923905147946086,
              "output_power": 0.000586828964518266,
              "delta_db": -0.04096554622857047,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 0.00014629106162114991,
              "output_power": 0.0001449583698243514,
              "delta_db": -0.039744951950899055,
              "reference_active": true
            },
            {
              "low_hz": 8000.0,
              "high_hz": 12000.0,
              "reference_power": 2.135938879727136e-18,
              "output_power": 4.755232026792721e-10,
              "delta_db": 26.771717127555057,
              "reference_active": false
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 6,
          "band_count": 7,
          "active_band_mae_db": 0.15751905544639586,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": -0.036677936042533804,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1920
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 113,
          "expected_voiced_frames": 113,
          "expected_unvoiced_frames": 0,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 113,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": 0.07254425537444506,
          "abs_error_cents_p95": 0.11620401306573902,
          "voiced_detection_rate": 1.0,
          "unvoiced_false_positive_rate": null,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -11.635670009347368,
        "output_peak": 0.6017717684512226,
        "reference_rms_dbfs": -11.598992073304835,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 0.9613385588983435
      }
    },
    {
      "case": "missing_fundamental_150_24000",
      "kind": "known_periodic",
      "method": "identity",
      "base_method": "world_harvest",
      "decoder_family": "none",
      "f0_source": null,
      "role": "measurement_sanity_only_not_a_vocoder",
      "status": "measured",
      "seconds": 3.387000106158666e-05,
      "rtf": 2.8225000884655554e-05,
      "output_sha256": "6c169c6d869b6429ec7c71d5a0e4d370c09dd2e862f7195eb19db29ff0630488",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 28800,
        "output_samples": 28800,
        "length_delta_samples": 0,
        "sample_rate": 24000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 120,
            "hop_samples": 30,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.6789106478412106e-06
          },
          {
            "window_ms": 20,
            "window_samples": 480,
            "hop_samples": 120,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 9.59693716728409e-07
          },
          {
            "window_ms": 80,
            "window_samples": 1920,
            "hop_samples": 480,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 9.59693716728388e-07
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 2.0390810256231928e-09,
              "output_power": 2.0390810256231928e-09,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.026052876569692504,
              "output_power": 0.026052876569692504,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.00939908553778103,
              "output_power": 0.00939908553778103,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.005735985755836545,
              "output_power": 0.005735985755836545,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.0006887453396994243,
              "output_power": 0.0006887453396994243,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 1.42139458684016e-15,
              "output_power": 1.42139458684016e-15,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 8000.0,
              "high_hz": 12000.0,
              "reference_power": 1.550662980281035e-17,
              "output_power": 1.550662980281035e-17,
              "delta_db": 0.0,
              "reference_active": false
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 4,
          "band_count": 7,
          "active_band_mae_db": 0.0,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.0,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1920
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 113,
          "expected_voiced_frames": 113,
          "expected_unvoiced_frames": 0,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 113,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": 0.03345571045785979,
          "abs_error_cents_p95": 0.03345571045978181,
          "voiced_detection_rate": 1.0,
          "unvoiced_false_positive_rate": null,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -13.78027598596679,
        "output_peak": 0.6,
        "reference_rms_dbfs": -13.78027598596679,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 0.0
      }
    },
    {
      "case": "missing_fundamental_150_24000",
      "kind": "known_periodic",
      "method": "world_dio",
      "base_method": "world_harvest",
      "decoder_family": "WORLD",
      "f0_source": "WORLD DIO+StoneMask",
      "native_length_policy": "C API synthesizes requested n_samples directly; no crop/pad",
      "feature_scalars": 247507,
      "feature_f0_voiced_fraction": 0.995850622406639,
      "status": "measured",
      "seconds": 0.13172770000164746,
      "rtf": 0.10977308333470623,
      "output_sha256": "427f2fa97ea70b8bdf80251e54250fc5d3827d55535e4161a6d55080db1dcfad",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 28800,
        "output_samples": 28800,
        "length_delta_samples": 0,
        "sample_rate": 24000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 120,
            "hop_samples": 30,
            "log_magnitude_mae_db": 4.73260693828429,
            "spectral_convergence": 0.6474468815459222,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.6789106478412106e-06
          },
          {
            "window_ms": 20,
            "window_samples": 480,
            "hop_samples": 120,
            "log_magnitude_mae_db": 5.68130624736002,
            "spectral_convergence": 0.5800747855147156,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 9.59693716728409e-07
          },
          {
            "window_ms": 80,
            "window_samples": 1920,
            "hop_samples": 480,
            "log_magnitude_mae_db": 13.263063978051818,
            "spectral_convergence": 0.9401706961118202,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 9.59693716728388e-07
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 2.0390810256231928e-09,
              "output_power": 0.0001670460061586452,
              "delta_db": 49.13401613316125,
              "reference_active": false
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.026052876569692504,
              "output_power": 0.024941362165512394,
              "delta_db": -0.18935513268318616,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.00939908553778103,
              "output_power": 0.015179839178863362,
              "delta_db": 2.0818156851759513,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.005735985755836545,
              "output_power": 0.005232651430128551,
              "delta_db": -0.39886258736167957,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.0006887453396994243,
              "output_power": 0.001392380800628221,
              "delta_db": 3.0569935294311357,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 1.42139458684016e-15,
              "output_power": 1.504310870499976e-10,
              "delta_db": 21.773375938299022,
              "reference_active": false
            },
            {
              "low_hz": 8000.0,
              "high_hz": 12000.0,
              "reference_power": 1.550662980281035e-17,
              "output_power": 4.859330735559083e-11,
              "delta_db": 16.8657645900128,
              "reference_active": false
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 4,
          "band_count": 7,
          "active_band_mae_db": 1.4317567336629882,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.4932339480755683,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1920
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 113,
          "expected_voiced_frames": 113,
          "expected_unvoiced_frames": 0,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 62,
          "missing_voiced_frames": 51,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 62,
          "abs_error_cents_median": 1207.257887175346,
          "abs_error_cents_p95": 1211.824853728631,
          "voiced_detection_rate": 0.5486725663716814,
          "unvoiced_false_positive_rate": null,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -13.287042037891224,
        "output_peak": 0.8585415915800908,
        "reference_rms_dbfs": -13.78027598596679,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 7.8923257212320435
      }
    },
    {
      "case": "missing_fundamental_150_24000",
      "kind": "known_periodic",
      "method": "world_harvest",
      "base_method": "world_harvest",
      "decoder_family": "WORLD",
      "f0_source": "WORLD Harvest",
      "native_length_policy": "C API synthesizes requested n_samples directly; no crop/pad",
      "feature_scalars": 247507,
      "feature_f0_voiced_fraction": 0.0,
      "status": "measured",
      "seconds": 0.17282637700191117,
      "rtf": 0.14402198083492598,
      "output_sha256": "0cec017ae443af5c64b7c0bcc4b6f055aa4830f50c9396c6e2ff1350c9fbc8fd",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 28800,
        "output_samples": 28800,
        "length_delta_samples": 0,
        "sample_rate": 24000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 120,
            "hop_samples": 30,
            "log_magnitude_mae_db": 5.148533727260544,
            "spectral_convergence": 0.8251145636837949,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.6789106478412106e-06
          },
          {
            "window_ms": 20,
            "window_samples": 480,
            "hop_samples": 120,
            "log_magnitude_mae_db": 7.089186916021067,
            "spectral_convergence": 0.7242474565167426,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 9.59693716728409e-07
          },
          {
            "window_ms": 80,
            "window_samples": 1920,
            "hop_samples": 480,
            "log_magnitude_mae_db": 14.902550665810207,
            "spectral_convergence": 1.1256180174060042,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 9.59693716728388e-07
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 2.0390810256231928e-09,
              "output_power": 0.003899754205487618,
              "delta_db": 62.816027516913664,
              "reference_active": false
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.026052876569692504,
              "output_power": 0.023846661068263778,
              "delta_db": -0.3842810279471482,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.00939908553778103,
              "output_power": 0.012709597607453528,
              "delta_db": 1.3104619879878427,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.005735985755836545,
              "output_power": 0.005664671087280408,
              "delta_db": -0.054333660647481824,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.0006887453396994243,
              "output_power": 0.0015899910581279105,
              "delta_db": 3.6333600864413107,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 1.42139458684016e-15,
              "output_power": 1.9856726164664887e-09,
              "delta_db": 32.979076466858935,
              "reference_active": false
            },
            {
              "low_hz": 8000.0,
              "high_hz": 12000.0,
              "reference_power": 1.550662980281035e-17,
              "output_power": 7.93007739982116e-10,
              "delta_db": 28.992774261765177,
              "reference_active": false
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 4,
          "band_count": 7,
          "active_band_mae_db": 1.3456091907559458,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.566431850362976,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1920
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 113,
          "expected_voiced_frames": 113,
          "expected_unvoiced_frames": 0,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 0,
          "missing_voiced_frames": 113,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": null,
          "abs_error_cents_p95": null,
          "voiced_detection_rate": 0.0,
          "unvoiced_false_positive_rate": null,
          "score_status": "no_valid_voiced_frames",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -13.213844135603814,
        "output_peak": 1.140977003783457,
        "reference_rms_dbfs": -13.78027598596679,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 9.046757103030606
      }
    },
    {
      "case": "missing_fundamental_150_24000",
      "kind": "known_periodic",
      "method": "llsm_world_dio",
      "base_method": "world_harvest",
      "decoder_family": "LLSM layer0",
      "f0_source": "WORLD DIO+StoneMask",
      "native_metadata": {
        "method": "llsm-layer0-czt-external-f0",
        "sample_rate": 24000,
        "input_samples": 28800,
        "output_samples": 28800,
        "native_output_samples": 29040,
        "trimmed_tail_samples": 240,
        "fixed_delay_samples": 0,
        "hop_seconds": 0.005,
        "seed": 0,
        "f0_refine": false,
        "native_rng_seed": 1,
        "rng": "libc srand/rand; same pinned runtime only",
        "normalization": "none",
        "residual_waveform_bypass": false,
        "noise_band_edges_hz": [
          2000,
          4000,
          8000
        ]
      },
      "status": "measured",
      "seconds": 0.09647408999808249,
      "rtf": 0.08039507499840208,
      "output_sha256": "b56ec2c9dc1438e7b0619748da73290c0ce6c65511ecda76694b2de5a3f0ee15",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 28800,
        "output_samples": 28800,
        "length_delta_samples": 0,
        "sample_rate": 24000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 120,
            "hop_samples": 30,
            "log_magnitude_mae_db": 15.380980804053197,
            "spectral_convergence": 0.6101945819903071,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.6789106478412106e-06
          },
          {
            "window_ms": 20,
            "window_samples": 480,
            "hop_samples": 120,
            "log_magnitude_mae_db": 24.346339406824512,
            "spectral_convergence": 0.35688717164128286,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 9.59693716728409e-07
          },
          {
            "window_ms": 80,
            "window_samples": 1920,
            "hop_samples": 480,
            "log_magnitude_mae_db": 28.312116505715363,
            "spectral_convergence": 0.6288315446969415,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 9.59693716728388e-07
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 2.0390810256231928e-09,
              "output_power": 0.0001654135474235967,
              "delta_db": 49.0913659213762,
              "reference_active": false
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.026052876569692504,
              "output_power": 0.02360172483970852,
              "delta_db": -0.42911939087347006,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.00939908553778103,
              "output_power": 0.00935041244516321,
              "delta_db": -0.02254834027542093,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.005735985755836545,
              "output_power": 0.004621933605864362,
              "delta_db": -0.9378436163626476,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.0006887453396994243,
              "output_power": 0.0005264875876938127,
              "delta_db": -1.1667053642417973,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 1.42139458684016e-15,
              "output_power": 1.440916000177017e-07,
              "delta_db": 51.58638663865396,
              "reference_active": false
            },
            {
              "low_hz": 8000.0,
              "high_hz": 12000.0,
              "reference_power": 1.550662980281035e-17,
              "output_power": 7.142638364551736e-08,
              "delta_db": 48.53858662128533,
              "reference_active": false
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 4,
          "band_count": 7,
          "active_band_mae_db": 0.639054177938334,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": -0.3915720573621145,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1920
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 113,
          "expected_voiced_frames": 113,
          "expected_unvoiced_frames": 0,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 0,
          "missing_voiced_frames": 113,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": null,
          "abs_error_cents_p95": null,
          "voiced_detection_rate": 0.0,
          "unvoiced_false_positive_rate": null,
          "score_status": "no_valid_voiced_frames",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -14.171848043328906,
        "output_peak": 0.7530896305589807,
        "reference_rms_dbfs": -13.78027598596679,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 22.679812238864358
      }
    },
    {
      "case": "harmonic_sweep_90_240_24000",
      "kind": "known_periodic_sweep",
      "method": "identity",
      "base_method": "world_harvest",
      "decoder_family": "none",
      "f0_source": null,
      "role": "measurement_sanity_only_not_a_vocoder",
      "status": "measured",
      "seconds": 4.448500112630427e-05,
      "rtf": 2.965666741753618e-05,
      "output_sha256": "d08f0a93e4a979bfe7833f354536a0cdbd8ec57c61309d83c494a9d69e14073b",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 36000,
        "output_samples": 36000,
        "length_delta_samples": 0,
        "sample_rate": 24000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 120,
            "hop_samples": 30,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 3.55320470668471e-06
          },
          {
            "window_ms": 20,
            "window_samples": 480,
            "hop_samples": 120,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.8136621563529383e-06
          },
          {
            "window_ms": 80,
            "window_samples": 1920,
            "hop_samples": 480,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.7818710827781096e-06
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.04239361340416796,
              "output_power": 0.04239361340416796,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.03106500151487297,
              "output_power": 0.03106500151487297,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.0030728431524343755,
              "output_power": 0.0030728431524343755,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.000991105398187423,
              "output_power": 0.000991105398187423,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.00024487204538874196,
              "output_power": 0.00024487204538874196,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 1.135676467453045e-05,
              "output_power": 1.135676467453045e-05,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 8000.0,
              "high_hz": 12000.0,
              "reference_power": 3.2406827864853453e-18,
              "output_power": 3.2406827864853453e-18,
              "delta_db": 0.0,
              "reference_active": false
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 6,
          "band_count": 7,
          "active_band_mae_db": 0.0,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.0,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1920
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 143,
          "expected_voiced_frames": 143,
          "expected_unvoiced_frames": 0,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 143,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": 0.7517397795693007,
          "abs_error_cents_p95": 3.078310669659668,
          "voiced_detection_rate": 1.0,
          "unvoiced_false_positive_rate": null,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -11.091388047000379,
        "output_peak": 0.6,
        "reference_rms_dbfs": -11.091388047000379,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 0.0
      }
    },
    {
      "case": "harmonic_sweep_90_240_24000",
      "kind": "known_periodic_sweep",
      "method": "world_dio",
      "base_method": "world_harvest",
      "decoder_family": "WORLD",
      "f0_source": "WORLD DIO+StoneMask",
      "native_length_policy": "C API synthesizes requested n_samples directly; no crop/pad",
      "feature_scalars": 309127,
      "feature_f0_voiced_fraction": 0.9966777408637874,
      "status": "measured",
      "seconds": 0.17015917599928798,
      "rtf": 0.11343945066619199,
      "output_sha256": "c9534c521a77669c5fddc1818ae32c08da1df4068daf5296a7654657023c1af7",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 36000,
        "output_samples": 36000,
        "length_delta_samples": 0,
        "sample_rate": 24000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 120,
            "hop_samples": 30,
            "log_magnitude_mae_db": 4.7388843620328265,
            "spectral_convergence": 0.42558379418771686,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 3.55320470668471e-06
          },
          {
            "window_ms": 20,
            "window_samples": 480,
            "hop_samples": 120,
            "log_magnitude_mae_db": 3.0359356277614467,
            "spectral_convergence": 0.1387470154919255,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.8136621563529383e-06
          },
          {
            "window_ms": 80,
            "window_samples": 1920,
            "hop_samples": 480,
            "log_magnitude_mae_db": 2.957315365707427,
            "spectral_convergence": 0.08709948578375085,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.7818710827781096e-06
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.04239361340416796,
              "output_power": 0.05028805274442079,
              "delta_db": 0.741643841042024,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.03106500151487297,
              "output_power": 0.03521045946220099,
              "delta_db": 0.5440031309980635,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.0030728431524343755,
              "output_power": 0.002944134717253221,
              "delta_db": -0.18582714569021658,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.000991105398187423,
              "output_power": 0.000955603486961367,
              "delta_db": -0.15842115781365196,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.00024487204538874196,
              "output_power": 0.0002461707087926343,
              "delta_db": 0.022971672439035806,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 1.135676467453045e-05,
              "output_power": 1.7581998285961277e-05,
              "delta_db": 1.8981360659284299,
              "reference_active": true
            },
            {
              "low_hz": 8000.0,
              "high_hz": 12000.0,
              "reference_power": 3.2406827864853453e-18,
              "output_power": 6.881021526364752e-10,
              "delta_db": 28.376529164813007,
              "reference_active": false
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 6,
          "band_count": 7,
          "active_band_mae_db": 0.5918338356519036,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.617472451429461,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1920
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 143,
          "expected_voiced_frames": 143,
          "expected_unvoiced_frames": 0,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 143,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": 0.9541055858903381,
          "abs_error_cents_p95": 3.706751594463198,
          "voiced_detection_rate": 1.0,
          "unvoiced_false_positive_rate": null,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -10.473915595570917,
        "output_peak": 0.6117093079902598,
        "reference_rms_dbfs": -11.091388047000379,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 3.5773784518339
      }
    },
    {
      "case": "harmonic_sweep_90_240_24000",
      "kind": "known_periodic_sweep",
      "method": "world_harvest",
      "base_method": "world_harvest",
      "decoder_family": "WORLD",
      "f0_source": "WORLD Harvest",
      "native_length_policy": "C API synthesizes requested n_samples directly; no crop/pad",
      "feature_scalars": 309127,
      "feature_f0_voiced_fraction": 1.0,
      "status": "measured",
      "seconds": 0.4158969240015722,
      "rtf": 0.2772646160010481,
      "output_sha256": "a1914fc2c38d6d4c01ce647b37ea26b8eed5aa35fd679e582d1bd5821647c92b",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 36000,
        "output_samples": 36000,
        "length_delta_samples": 0,
        "sample_rate": 24000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 120,
            "hop_samples": 30,
            "log_magnitude_mae_db": 4.474096901223107,
            "spectral_convergence": 0.4023506604232822,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 3.55320470668471e-06
          },
          {
            "window_ms": 20,
            "window_samples": 480,
            "hop_samples": 120,
            "log_magnitude_mae_db": 2.958812475736727,
            "spectral_convergence": 0.1156078358987256,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.8136621563529383e-06
          },
          {
            "window_ms": 80,
            "window_samples": 1920,
            "hop_samples": 480,
            "log_magnitude_mae_db": 2.953166185128354,
            "spectral_convergence": 0.08590713692177124,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.7818710827781096e-06
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.04239361340416796,
              "output_power": 0.050372305113511394,
              "delta_db": 0.7489139021279558,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.03106500151487297,
              "output_power": 0.03519448721108646,
              "delta_db": 0.5420326272282628,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.0030728431524343755,
              "output_power": 0.0029431717399976756,
              "delta_db": -0.187247882711631,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.000991105398187423,
              "output_power": 0.0009563465631640012,
              "delta_db": -0.15504540110217485,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.00024487204538874196,
              "output_power": 0.00024750786520126827,
              "delta_db": 0.04649795453496196,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 1.135676467453045e-05,
              "output_power": 1.8199244057912338e-05,
              "delta_db": 2.0479872228079947,
              "reference_active": true
            },
            {
              "low_hz": 8000.0,
              "high_hz": 12000.0,
              "reference_power": 3.2406827864853453e-18,
              "output_power": 6.536224751255763e-10,
              "delta_db": 28.153269772073468,
              "reference_active": false
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 6,
          "band_count": 7,
          "active_band_mae_db": 0.6212874984188302,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.6208624138068626,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1920
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 143,
          "expected_voiced_frames": 143,
          "expected_unvoiced_frames": 0,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 143,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": 0.9951866083957747,
          "abs_error_cents_p95": 3.788539244933163,
          "voiced_detection_rate": 1.0,
          "unvoiced_false_positive_rate": null,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -10.470525633193517,
        "output_peak": 0.6059883442977572,
        "reference_rms_dbfs": -11.091388047000379,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 3.462025187362729
      }
    },
    {
      "case": "harmonic_sweep_90_240_24000",
      "kind": "known_periodic_sweep",
      "method": "llsm_world_dio",
      "base_method": "world_harvest",
      "decoder_family": "LLSM layer0",
      "f0_source": "WORLD DIO+StoneMask",
      "native_metadata": {
        "method": "llsm-layer0-czt-external-f0",
        "sample_rate": 24000,
        "input_samples": 36000,
        "output_samples": 36000,
        "native_output_samples": 36240,
        "trimmed_tail_samples": 240,
        "fixed_delay_samples": 0,
        "hop_seconds": 0.005,
        "seed": 0,
        "f0_refine": false,
        "native_rng_seed": 1,
        "rng": "libc srand/rand; same pinned runtime only",
        "normalization": "none",
        "residual_waveform_bypass": false,
        "noise_band_edges_hz": [
          2000,
          4000,
          8000
        ]
      },
      "status": "measured",
      "seconds": 0.21070058199984487,
      "rtf": 0.14046705466656326,
      "output_sha256": "c439b1f5ba8415e84cc2acc4b18bcd83f020e46e8043c8f8aa392ff9c9c1fe34",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 36000,
        "output_samples": 36000,
        "length_delta_samples": 0,
        "sample_rate": 24000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 120,
            "hop_samples": 30,
            "log_magnitude_mae_db": 0.8879678417338852,
            "spectral_convergence": 0.02753618223594942,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 3.55320470668471e-06
          },
          {
            "window_ms": 20,
            "window_samples": 480,
            "hop_samples": 120,
            "log_magnitude_mae_db": 1.1067037243763465,
            "spectral_convergence": 0.021499811032562106,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.8136621563529383e-06
          },
          {
            "window_ms": 80,
            "window_samples": 1920,
            "hop_samples": 480,
            "log_magnitude_mae_db": 1.2150724785368932,
            "spectral_convergence": 0.018629992291140103,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.7818710827781096e-06
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.04239361340416796,
              "output_power": 0.04184684420136067,
              "delta_db": -0.056377229899055845,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.03106500151487297,
              "output_power": 0.030778737190179366,
              "delta_db": -0.040205817796162266,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.0030728431524343755,
              "output_power": 0.0030424238019670924,
              "delta_db": -0.04320683010208515,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.000991105398187423,
              "output_power": 0.0009787961991172985,
              "delta_db": -0.054275673651682455,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.00024487204538874196,
              "output_power": 0.00024203613884730813,
              "delta_db": -0.05058992758314187,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 1.135676467453045e-05,
              "output_power": 1.124002150300364e-05,
              "delta_db": -0.04487484715203893,
              "reference_active": true
            },
            {
              "low_hz": 8000.0,
              "high_hz": 12000.0,
              "reference_power": 3.2406827864853453e-18,
              "output_power": 6.210386765014036e-10,
              "delta_db": 27.931186476292275,
              "reference_active": false
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 6,
          "band_count": 7,
          "active_band_mae_db": 0.04825505436402775,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": -0.04934414009254014,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1920
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 143,
          "expected_voiced_frames": 143,
          "expected_unvoiced_frames": 0,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 143,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": 0.7992032750881489,
          "abs_error_cents_p95": 3.176022333635328,
          "voiced_detection_rate": 1.0,
          "unvoiced_false_positive_rate": null,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -11.140732187092919,
        "output_peak": 0.6087414829214227,
        "reference_rms_dbfs": -11.091388047000379,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 1.0699146815490417
      }
    },
    {
      "case": "pulse_iir_vowel_90_24000",
      "kind": "known_source_filter",
      "method": "identity",
      "base_method": "world_harvest",
      "decoder_family": "none",
      "f0_source": null,
      "role": "measurement_sanity_only_not_a_vocoder",
      "status": "measured",
      "seconds": 3.4930999390780926e-05,
      "rtf": 2.9109166158984106e-05,
      "output_sha256": "73c5ec410d60de72f75c4ef9caf8bbfb5aaa13570af7fce60fa241ab2d65c816",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 28800,
        "output_samples": 28800,
        "length_delta_samples": 0,
        "sample_rate": 24000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 120,
            "hop_samples": 30,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.5469380564580222e-06
          },
          {
            "window_ms": 20,
            "window_samples": 480,
            "hop_samples": 120,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 7.554453537804852e-07
          },
          {
            "window_ms": 80,
            "window_samples": 1920,
            "hop_samples": 480,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 6.593378972549988e-07
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.000253091636230152,
              "output_power": 0.000253091636230152,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.0008666933732315855,
              "output_power": 0.0008666933732315855,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.01924727343304346,
              "output_power": 0.01924727343304346,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.005429834188185286,
              "output_power": 0.005429834188185286,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 2.6911704595528546e-05,
              "output_power": 2.6911704595528546e-05,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 7.567305096100016e-10,
              "output_power": 7.567305096100016e-10,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 8000.0,
              "high_hz": 12000.0,
              "reference_power": 1.9946245986022405e-13,
              "output_power": 1.9946245986022405e-13,
              "delta_db": 0.0,
              "reference_active": false
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 5,
          "band_count": 7,
          "active_band_mae_db": 0.0,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.0,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1920
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 113,
          "expected_voiced_frames": 113,
          "expected_unvoiced_frames": 0,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 113,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": 0.01313539760686003,
          "abs_error_cents_p95": 0.08804423520154184,
          "voiced_detection_rate": 1.0,
          "unvoiced_false_positive_rate": null,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -15.879797648272351,
        "output_peak": 0.6,
        "reference_rms_dbfs": -15.879797648272351,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 0.0
      }
    },
    {
      "case": "pulse_iir_vowel_90_24000",
      "kind": "known_source_filter",
      "method": "world_dio",
      "base_method": "world_harvest",
      "decoder_family": "WORLD",
      "f0_source": "WORLD DIO+StoneMask",
      "native_length_policy": "C API synthesizes requested n_samples directly; no crop/pad",
      "feature_scalars": 247507,
      "feature_f0_voiced_fraction": 0.995850622406639,
      "status": "measured",
      "seconds": 0.1699991700006649,
      "rtf": 0.14166597500055408,
      "output_sha256": "d1f81aed7dc1159df0f3acfb448d108d68b9b1d21ef62a9d6198ab3730fea9db",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 28800,
        "output_samples": 28800,
        "length_delta_samples": 0,
        "sample_rate": 24000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 120,
            "hop_samples": 30,
            "log_magnitude_mae_db": 3.613379278295746,
            "spectral_convergence": 0.1646806067935163,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.5469380564580222e-06
          },
          {
            "window_ms": 20,
            "window_samples": 480,
            "hop_samples": 120,
            "log_magnitude_mae_db": 4.78618130512008,
            "spectral_convergence": 0.12147777161977441,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 7.554453537804852e-07
          },
          {
            "window_ms": 80,
            "window_samples": 1920,
            "hop_samples": 480,
            "log_magnitude_mae_db": 2.195664234971732,
            "spectral_convergence": 0.11458512999885627,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 6.593378972549988e-07
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.000253091636230152,
              "output_power": 0.00020229347322611038,
              "delta_db": -0.9729592255362596,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.0008666933732315855,
              "output_power": 0.0008282457922070915,
              "delta_db": -0.1970623776138898,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.01924727343304346,
              "output_power": 0.022203098039196935,
              "delta_db": 0.6204436050232693,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.005429834188185286,
              "output_power": 0.006067910292311231,
              "delta_db": 0.4825258391047865,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 2.6911704595528546e-05,
              "output_power": 2.7582012660535842e-05,
              "delta_db": 0.10684746502194997,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 7.567305096100016e-10,
              "output_power": 1.2316333777110258e-09,
              "delta_db": 2.1154020586693836,
              "reference_active": false
            },
            {
              "low_hz": 8000.0,
              "high_hz": 12000.0,
              "reference_power": 1.9946245986022405e-13,
              "output_power": 3.012305444402555e-10,
              "delta_db": 24.788990067361354,
              "reference_active": false
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 5,
          "band_count": 7,
          "active_band_mae_db": 0.475967702460031,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.5527896229050699,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1920
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 113,
          "expected_voiced_frames": 113,
          "expected_unvoiced_frames": 0,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 113,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": 0.029163579855892127,
          "abs_error_cents_p95": 0.11368028719754664,
          "voiced_detection_rate": 1.0,
          "unvoiced_false_positive_rate": null,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -15.327008025367281,
        "output_peak": 0.6310439920440539,
        "reference_rms_dbfs": -15.879797648272351,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 3.531741606129186
      }
    },
    {
      "case": "pulse_iir_vowel_90_24000",
      "kind": "known_source_filter",
      "method": "world_harvest",
      "base_method": "world_harvest",
      "decoder_family": "WORLD",
      "f0_source": "WORLD Harvest",
      "native_length_policy": "C API synthesizes requested n_samples directly; no crop/pad",
      "feature_scalars": 247507,
      "feature_f0_voiced_fraction": 1.0,
      "status": "measured",
      "seconds": 0.41289706400129944,
      "rtf": 0.34408088666774955,
      "output_sha256": "60679926db9ab1567b7d289f5a6b714740e23562b595b2c8d162ff856dd911d3",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 28800,
        "output_samples": 28800,
        "length_delta_samples": 0,
        "sample_rate": 24000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 120,
            "hop_samples": 30,
            "log_magnitude_mae_db": 3.367151930631433,
            "spectral_convergence": 0.1655873423184784,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.5469380564580222e-06
          },
          {
            "window_ms": 20,
            "window_samples": 480,
            "hop_samples": 120,
            "log_magnitude_mae_db": 4.049773392565051,
            "spectral_convergence": 0.11980955768816985,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 7.554453537804852e-07
          },
          {
            "window_ms": 80,
            "window_samples": 1920,
            "hop_samples": 480,
            "log_magnitude_mae_db": 2.285093646817108,
            "spectral_convergence": 0.11294879847975538,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 6.593378972549988e-07
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.000253091636230152,
              "output_power": 0.0002024516774726605,
              "delta_db": -0.9695641392865123,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.0008666933732315855,
              "output_power": 0.0008271217407812557,
              "delta_db": -0.20296039599249557,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.01924727343304346,
              "output_power": 0.022166863580130286,
              "delta_db": 0.6133503245464227,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.005429834188185286,
              "output_power": 0.006073636134343933,
              "delta_db": 0.4866220253664284,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 2.6911704595528546e-05,
              "output_power": 2.756161648768299e-05,
              "delta_db": 0.10363478357072767,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 7.567305096100016e-10,
              "output_power": 1.1701789617317236e-09,
              "delta_db": 1.8931104174355673,
              "reference_active": false
            },
            {
              "low_hz": 8000.0,
              "high_hz": 12000.0,
              "reference_power": 1.9946245986022405e-13,
              "output_power": 2.5433077548882924e-10,
              "delta_db": 24.053989154894527,
              "reference_active": false
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 5,
          "band_count": 7,
          "active_band_mae_db": 0.4752263337525173,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.5481234633763822,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1920
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 113,
          "expected_voiced_frames": 113,
          "expected_unvoiced_frames": 0,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 113,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": 0.01134233736489489,
          "abs_error_cents_p95": 0.20163637667693898,
          "voiced_detection_rate": 1.0,
          "unvoiced_false_positive_rate": null,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -15.33167418489597,
        "output_peak": 0.6306761400210698,
        "reference_rms_dbfs": -15.879797648272351,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 3.234006323337864
      }
    },
    {
      "case": "pulse_iir_vowel_90_24000",
      "kind": "known_source_filter",
      "method": "llsm_world_dio",
      "base_method": "world_harvest",
      "decoder_family": "LLSM layer0",
      "f0_source": "WORLD DIO+StoneMask",
      "native_metadata": {
        "method": "llsm-layer0-czt-external-f0",
        "sample_rate": 24000,
        "input_samples": 28800,
        "output_samples": 28800,
        "native_output_samples": 29040,
        "trimmed_tail_samples": 240,
        "fixed_delay_samples": 0,
        "hop_seconds": 0.005,
        "seed": 0,
        "f0_refine": false,
        "native_rng_seed": 1,
        "rng": "libc srand/rand; same pinned runtime only",
        "normalization": "none",
        "residual_waveform_bypass": false,
        "noise_band_edges_hz": [
          2000,
          4000,
          8000
        ]
      },
      "status": "measured",
      "seconds": 0.24252739800067502,
      "rtf": 0.20210616500056253,
      "output_sha256": "2b3a5a63a0d5a75d0727a0613953704edbd40a4eebcfcd558e546b294caa53ec",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 28800,
        "output_samples": 28800,
        "length_delta_samples": 0,
        "sample_rate": 24000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 120,
            "hop_samples": 30,
            "log_magnitude_mae_db": 2.542217936902812,
            "spectral_convergence": 0.07258497743489896,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.5469380564580222e-06
          },
          {
            "window_ms": 20,
            "window_samples": 480,
            "hop_samples": 120,
            "log_magnitude_mae_db": 2.627193156177647,
            "spectral_convergence": 0.04313672234747296,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 7.554453537804852e-07
          },
          {
            "window_ms": 80,
            "window_samples": 1920,
            "hop_samples": 480,
            "log_magnitude_mae_db": 2.0001484372163816,
            "spectral_convergence": 0.052431694792561864,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 6.593378972549988e-07
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.000253091636230152,
              "output_power": 0.0002530948436039094,
              "delta_db": 5.5036820609264886e-05,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.0008666933732315855,
              "output_power": 0.0008562628224384059,
              "delta_db": -0.05258387885807536,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.01924727343304346,
              "output_power": 0.019013158673831135,
              "delta_db": -0.0531494347829982,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.005429834188185286,
              "output_power": 0.005366278423912543,
              "delta_db": -0.05113365814170133,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 2.6911704595528546e-05,
              "output_power": 2.6509562515602017e-05,
              "delta_db": -0.06538646301037511,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 7.567305096100016e-10,
              "output_power": 1.2515180825291225e-09,
              "delta_db": 2.184958848214186,
              "reference_active": false
            },
            {
              "low_hz": 8000.0,
              "high_hz": 12000.0,
              "reference_power": 1.9946245986022405e-13,
              "output_power": 2.0977784374012518e-10,
              "delta_db": 23.217596170818943,
              "reference_active": false
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 5,
          "band_count": 7,
          "active_band_mae_db": 0.044461694322751856,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": -0.052194576810596666,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1920
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 113,
          "expected_voiced_frames": 113,
          "expected_unvoiced_frames": 0,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 113,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": 0.01916332069549824,
          "abs_error_cents_p95": 0.14238644128178699,
          "voiced_detection_rate": 1.0,
          "unvoiced_false_positive_rate": null,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -15.931992225082947,
        "output_peak": 0.6190890447355635,
        "reference_rms_dbfs": -15.879797648272351,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 2.3898531767656137
      }
    },
    {
      "case": "am_noise_6hz_24000",
      "kind": "known_unvoiced",
      "method": "identity",
      "base_method": "world_harvest",
      "decoder_family": "none",
      "f0_source": null,
      "role": "measurement_sanity_only_not_a_vocoder",
      "status": "measured",
      "seconds": 4.5136999688111246e-05,
      "rtf": 3.0091333125407498e-05,
      "output_sha256": "2d161a3e3cfcd234527d5a230cad1b32b4c920224976ecd4429e3f781d9413f3",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 36000,
        "output_samples": 36000,
        "length_delta_samples": 0,
        "sample_rate": 24000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 120,
            "hop_samples": 30,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 7.631656165540323e-07
          },
          {
            "window_ms": 20,
            "window_samples": 480,
            "hop_samples": 120,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 3.5855187109493593e-07
          },
          {
            "window_ms": 80,
            "window_samples": 1920,
            "hop_samples": 480,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 2.0674113225451663e-07
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 1.1631862164563455e-06,
              "output_power": 1.1631862164563455e-06,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.0003336513722501128,
              "output_power": 0.0003336513722501128,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.000950264796862024,
              "output_power": 0.000950264796862024,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.0018267199561446922,
              "output_power": 0.0018267199561446922,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.003672192455577471,
              "output_power": 0.003672192455577471,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 0.0038056228070004667,
              "output_power": 0.0038056228070004667,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 8000.0,
              "high_hz": 12000.0,
              "reference_power": 6.833598729632565e-06,
              "output_power": 6.833598729632565e-06,
              "delta_db": 0.0,
              "reference_active": true
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 7,
          "band_count": 7,
          "active_band_mae_db": 0.0,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.0,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1920
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 143,
          "expected_voiced_frames": 0,
          "expected_unvoiced_frames": 143,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 0,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": null,
          "abs_error_cents_p95": null,
          "voiced_detection_rate": null,
          "unvoiced_false_positive_rate": 0.0,
          "score_status": "no_valid_voiced_frames",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -19.748396816649617,
        "output_peak": 0.6,
        "reference_rms_dbfs": -19.748396816649617,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 0.0
      }
    },
    {
      "case": "am_noise_6hz_24000",
      "kind": "known_unvoiced",
      "method": "world_dio",
      "base_method": "world_harvest",
      "decoder_family": "WORLD",
      "f0_source": "WORLD DIO+StoneMask",
      "native_length_policy": "C API synthesizes requested n_samples directly; no crop/pad",
      "feature_scalars": 309127,
      "feature_f0_voiced_fraction": 0.0,
      "status": "measured",
      "seconds": 0.06487907599876053,
      "rtf": 0.04325271733250702,
      "output_sha256": "4ae957371a0a419bd11fc65b215862a5fe2fce4cd760b03af213740c9298f6cf",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 36000,
        "output_samples": 36000,
        "length_delta_samples": 0,
        "sample_rate": 24000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 120,
            "hop_samples": 30,
            "log_magnitude_mae_db": 5.5949800224709625,
            "spectral_convergence": 0.6346114046213728,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 7.631656165540323e-07
          },
          {
            "window_ms": 20,
            "window_samples": 480,
            "hop_samples": 120,
            "log_magnitude_mae_db": 5.894164439433252,
            "spectral_convergence": 0.6429790881973725,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 3.5855187109493593e-07
          },
          {
            "window_ms": 80,
            "window_samples": 1920,
            "hop_samples": 480,
            "log_magnitude_mae_db": 6.090782445672164,
            "spectral_convergence": 0.6562468879191931,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 2.0674113225451663e-07
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 1.1631862164563455e-06,
              "output_power": 4.1107614433194175e-05,
              "delta_db": 15.482730271961259,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.0003336513722501128,
              "output_power": 0.0003592438500205692,
              "delta_db": 0.3209642671296621,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.000950264796862024,
              "output_power": 0.0009619517444230441,
              "delta_db": 0.05308645672972811,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.0018267199561446922,
              "output_power": 0.0019054222503420855,
              "delta_db": 0.18319259049374653,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.003672192455577471,
              "output_power": 0.0038212156544481213,
              "delta_db": 0.17276114237018303,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 0.0038056228070004667,
              "output_power": 0.0037892504352980763,
              "delta_db": -0.0187243196127204,
              "reference_active": true
            },
            {
              "low_hz": 8000.0,
              "high_hz": 12000.0,
              "reference_power": 6.833598729632565e-06,
              "output_power": 7.026706048259318e-06,
              "delta_db": 0.12102312509642366,
              "reference_active": true
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 7,
          "band_count": 7,
          "active_band_mae_db": 2.336068881913389,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.11676822988576738,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1920
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 143,
          "expected_voiced_frames": 0,
          "expected_unvoiced_frames": 143,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 0,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": null,
          "abs_error_cents_p95": null,
          "voiced_detection_rate": null,
          "unvoiced_false_positive_rate": 0.0,
          "score_status": "no_valid_voiced_frames",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -19.63162858676385,
        "output_peak": 0.5648240652626947,
        "reference_rms_dbfs": -19.748396816649617,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 5.859975635858793
      }
    },
    {
      "case": "am_noise_6hz_24000",
      "kind": "known_unvoiced",
      "method": "world_harvest",
      "base_method": "world_harvest",
      "decoder_family": "WORLD",
      "f0_source": "WORLD Harvest",
      "native_length_policy": "C API synthesizes requested n_samples directly; no crop/pad",
      "feature_scalars": 309127,
      "feature_f0_voiced_fraction": 0.0033222591362126247,
      "status": "measured",
      "seconds": 0.18463654299921473,
      "rtf": 0.12309102866614315,
      "output_sha256": "a82e2b5e7b3d86f71583fd9d4feeda6ce63480deee7e5765ebd9672cec75531a",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 36000,
        "output_samples": 36000,
        "length_delta_samples": 0,
        "sample_rate": 24000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 120,
            "hop_samples": 30,
            "log_magnitude_mae_db": 5.5883038175515765,
            "spectral_convergence": 0.6346112388699701,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 7.631656165540323e-07
          },
          {
            "window_ms": 20,
            "window_samples": 480,
            "hop_samples": 120,
            "log_magnitude_mae_db": 5.88743220302194,
            "spectral_convergence": 0.6429787622529188,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 3.5855187109493593e-07
          },
          {
            "window_ms": 80,
            "window_samples": 1920,
            "hop_samples": 480,
            "log_magnitude_mae_db": 6.077818646865738,
            "spectral_convergence": 0.6562476691081083,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 2.0674113225451663e-07
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 1.1631862164563455e-06,
              "output_power": 4.1103676596773504e-05,
              "delta_db": 15.482314226766487,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.0003336513722501128,
              "output_power": 0.00035924559525681596,
              "delta_db": 0.32098536546246537,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.000950264796862024,
              "output_power": 0.0009619904448220934,
              "delta_db": 0.053261174762845524,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.0018267199561446922,
              "output_power": 0.0019053852718403915,
              "delta_db": 0.183108306209422,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.003672192455577471,
              "output_power": 0.0038211999729018133,
              "delta_db": 0.17274331970949247,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 0.0038056228070004667,
              "output_power": 0.0037892648830554873,
              "delta_db": -0.018707760745829076,
              "reference_active": true
            },
            {
              "low_hz": 8000.0,
              "high_hz": 12000.0,
              "reference_power": 6.833598729632565e-06,
              "output_power": 7.0266812739951216e-06,
              "delta_db": 0.12100781302113923,
              "reference_active": true
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 7,
          "band_count": 7,
          "active_band_mae_db": 2.336018280953955,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.11676753994945589,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1920
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 143,
          "expected_voiced_frames": 0,
          "expected_unvoiced_frames": 143,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 0,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": null,
          "abs_error_cents_p95": null,
          "voiced_detection_rate": null,
          "unvoiced_false_positive_rate": 0.0,
          "score_status": "no_valid_voiced_frames",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -19.63162927670016,
        "output_peak": 0.5648240652626947,
        "reference_rms_dbfs": -19.748396816649617,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 5.851184889146418
      }
    },
    {
      "case": "am_noise_6hz_24000",
      "kind": "known_unvoiced",
      "method": "llsm_world_dio",
      "base_method": "world_harvest",
      "decoder_family": "LLSM layer0",
      "f0_source": "WORLD DIO+StoneMask",
      "native_metadata": {
        "method": "llsm-layer0-czt-external-f0",
        "sample_rate": 24000,
        "input_samples": 36000,
        "output_samples": 36000,
        "native_output_samples": 36240,
        "trimmed_tail_samples": 240,
        "fixed_delay_samples": 0,
        "hop_seconds": 0.005,
        "seed": 0,
        "f0_refine": false,
        "native_rng_seed": 1,
        "rng": "libc srand/rand; same pinned runtime only",
        "normalization": "none",
        "residual_waveform_bypass": false,
        "noise_band_edges_hz": [
          2000,
          4000,
          8000
        ]
      },
      "status": "measured",
      "seconds": 0.03715885199926561,
      "rtf": 0.024772567999510404,
      "output_sha256": "e33d611eea848db7b92858d12ef8079cc52eb6af91f43fa30fef213e5f605b3f",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 36000,
        "output_samples": 36000,
        "length_delta_samples": 0,
        "sample_rate": 24000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 120,
            "hop_samples": 30,
            "log_magnitude_mae_db": 6.547037860764338,
            "spectral_convergence": 0.548651218892386,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 7.631656165540323e-07
          },
          {
            "window_ms": 20,
            "window_samples": 480,
            "hop_samples": 120,
            "log_magnitude_mae_db": 6.651437534266935,
            "spectral_convergence": 0.49205362473133557,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 3.5855187109493593e-07
          },
          {
            "window_ms": 80,
            "window_samples": 1920,
            "hop_samples": 480,
            "log_magnitude_mae_db": 7.374426666604392,
            "spectral_convergence": 0.5898208207867531,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 2.0674113225451663e-07
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 1.1631862164563455e-06,
              "output_power": 2.5045105624725752e-06,
              "delta_db": 3.3307362037885198,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.0003336513722501128,
              "output_power": 0.0003595561621957186,
              "delta_db": 0.3247382087136525,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.000950264796862024,
              "output_power": 0.001019744605122508,
              "delta_db": 0.3064677553570342,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.0018267199561446922,
              "output_power": 0.0018506975759806617,
              "delta_db": 0.05663482846760566,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.003672192455577471,
              "output_power": 0.003557974649810663,
              "delta_db": -0.13722584565816764,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 0.0038056228070004667,
              "output_power": 0.00380230916000541,
              "delta_db": -0.003783153430317254,
              "reference_active": true
            },
            {
              "low_hz": 8000.0,
              "high_hz": 12000.0,
              "reference_power": 6.833598729632565e-06,
              "output_power": 6.027212644796113e-06,
              "delta_db": -0.545329593586796,
              "reference_active": true
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 7,
          "band_count": 7,
          "active_band_mae_db": 0.6721307984288706,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.0009694732678681198,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1920
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 143,
          "expected_voiced_frames": 0,
          "expected_unvoiced_frames": 143,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 0,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": null,
          "abs_error_cents_p95": null,
          "voiced_detection_rate": null,
          "unvoiced_false_positive_rate": 0.0,
          "score_status": "no_valid_voiced_frames",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -19.747427343381748,
        "output_peak": 0.6548282385645436,
        "reference_rms_dbfs": -19.748396816649617,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 6.857634020545222
      }
    },
    {
      "case": "voiced_unvoiced_boundaries_24000",
      "kind": "known_mixed",
      "method": "identity",
      "base_method": "world_harvest",
      "decoder_family": "none",
      "f0_source": null,
      "role": "measurement_sanity_only_not_a_vocoder",
      "status": "measured",
      "seconds": 5.532100112759508e-05,
      "rtf": 3.4575625704746926e-05,
      "output_sha256": "c65954cd8f8f61fe666260ff0ae7eae569f400245c69d440e35bf6b9e2dda271",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 38400,
        "output_samples": 38400,
        "length_delta_samples": 0,
        "sample_rate": 24000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 120,
            "hop_samples": 30,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.4829081495669723e-06
          },
          {
            "window_ms": 20,
            "window_samples": 480,
            "hop_samples": 120,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.0451655225896614e-06
          },
          {
            "window_ms": 80,
            "window_samples": 1920,
            "hop_samples": 480,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.0421143003023435e-06
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.017949668611672003,
              "output_power": 0.017949668611672003,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.00305335715464887,
              "output_power": 0.00305335715464887,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.0023364217946556785,
              "output_power": 0.0023364217946556785,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.0018669016013489377,
              "output_power": 0.0018669016013489377,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.0027969227390688516,
              "output_power": 0.0027969227390688516,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 0.0029185612082491936,
              "output_power": 0.0029185612082491936,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 8000.0,
              "high_hz": 12000.0,
              "reference_power": 1.956235821234014e-05,
              "output_power": 1.956235821234014e-05,
              "delta_db": 0.0,
              "reference_active": true
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 7,
          "band_count": 7,
          "active_band_mae_db": 0.0,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.0,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1920
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 153,
          "expected_voiced_frames": 96,
          "expected_unvoiced_frames": 43,
          "boundary_frames": 14,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 96,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": 0.04836619574829707,
          "abs_error_cents_p95": 0.048414803844663595,
          "voiced_detection_rate": 1.0,
          "unvoiced_false_positive_rate": 0.0,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -15.094601033605402,
        "output_peak": 0.6,
        "reference_rms_dbfs": -15.094601033605402,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 0.0
      }
    },
    {
      "case": "voiced_unvoiced_boundaries_24000",
      "kind": "known_mixed",
      "method": "world_dio",
      "base_method": "world_harvest",
      "decoder_family": "WORLD",
      "f0_source": "WORLD DIO+StoneMask",
      "native_length_policy": "C API synthesizes requested n_samples directly; no crop/pad",
      "feature_scalars": 329667,
      "feature_f0_voiced_fraction": 0.6853582554517134,
      "status": "measured",
      "seconds": 0.15043704100025934,
      "rtf": 0.09402315062516209,
      "output_sha256": "8718ef2e65af80895abdfccbf62e35b54ef430a693fa73449d49525fb31e1cfd",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 38400,
        "output_samples": 38400,
        "length_delta_samples": 0,
        "sample_rate": 24000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 120,
            "hop_samples": 30,
            "log_magnitude_mae_db": 6.494274656951641,
            "spectral_convergence": 0.6356353296478374,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.4829081495669723e-06
          },
          {
            "window_ms": 20,
            "window_samples": 480,
            "hop_samples": 120,
            "log_magnitude_mae_db": 3.24087501820758,
            "spectral_convergence": 0.3365433753928935,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.0451655225896614e-06
          },
          {
            "window_ms": 80,
            "window_samples": 1920,
            "hop_samples": 480,
            "log_magnitude_mae_db": 5.192172483021466,
            "spectral_convergence": 0.34185217718874256,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.0421143003023435e-06
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.017949668611672003,
              "output_power": 0.020996517954341497,
              "delta_db": 0.6809084265141191,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.00305335715464887,
              "output_power": 0.003086984732681284,
              "delta_db": 0.04756874406618379,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.0023364217946556785,
              "output_power": 0.002329484788617991,
              "delta_db": -0.012913699016890398,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.0018669016013489377,
              "output_power": 0.0018763355782526578,
              "delta_db": 0.021890853236417842,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.0027969227390688516,
              "output_power": 0.0028844937021621554,
              "delta_db": 0.1338912529907008,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 0.0029185612082491936,
              "output_power": 0.0032381606318521573,
              "delta_db": 0.4512958272475717,
              "reference_active": true
            },
            {
              "low_hz": 8000.0,
              "high_hz": 12000.0,
              "reference_power": 1.956235821234014e-05,
              "output_power": 2.289691966316511e-05,
              "delta_db": 0.6835585322050363,
              "reference_active": true
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 7,
          "band_count": 7,
          "active_band_mae_db": 0.29028961932527425,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.4645860544511454,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1920
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 153,
          "expected_voiced_frames": 96,
          "expected_unvoiced_frames": 43,
          "boundary_frames": 14,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 96,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": 0.06175448681946338,
          "abs_error_cents_p95": 0.30032997251630505,
          "voiced_detection_rate": 1.0,
          "unvoiced_false_positive_rate": 0.0,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -14.630014979154257,
        "output_peak": 0.725556701527924,
        "reference_rms_dbfs": -15.094601033605402,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 4.975774052726895
      }
    },
    {
      "case": "voiced_unvoiced_boundaries_24000",
      "kind": "known_mixed",
      "method": "world_harvest",
      "base_method": "world_harvest",
      "decoder_family": "WORLD",
      "f0_source": "WORLD Harvest",
      "native_length_policy": "C API synthesizes requested n_samples directly; no crop/pad",
      "feature_scalars": 329667,
      "feature_f0_voiced_fraction": 0.7040498442367601,
      "status": "measured",
      "seconds": 0.34337849699659273,
      "rtf": 0.21461156062287046,
      "output_sha256": "c77ff75a8a5f0a819304d45ab3da4c00937cf155422f1321e406f7043031e76d",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 38400,
        "output_samples": 38400,
        "length_delta_samples": 0,
        "sample_rate": 24000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 120,
            "hop_samples": 30,
            "log_magnitude_mae_db": 5.153931826740202,
            "spectral_convergence": 0.49535894123029367,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.4829081495669723e-06
          },
          {
            "window_ms": 20,
            "window_samples": 480,
            "hop_samples": 120,
            "log_magnitude_mae_db": 3.2487570696120893,
            "spectral_convergence": 0.3382019953025722,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.0451655225896614e-06
          },
          {
            "window_ms": 80,
            "window_samples": 1920,
            "hop_samples": 480,
            "log_magnitude_mae_db": 5.124694989138944,
            "spectral_convergence": 0.3413116772246462,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.0421143003023435e-06
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.017949668611672003,
              "output_power": 0.02125856846666943,
              "delta_db": 0.7347758115668203,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.00305335715464887,
              "output_power": 0.00307487717421975,
              "delta_db": 0.03050165403455026,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.0023364217946556785,
              "output_power": 0.00232640842191382,
              "delta_db": -0.018652873941881264,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.0018669016013489377,
              "output_power": 0.0018092436625063984,
              "delta_db": -0.13624368187597127,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.0027969227390688516,
              "output_power": 0.0029434668669402995,
              "delta_db": 0.22178681768442016,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 0.0029185612082491936,
              "output_power": 0.003127782418719587,
              "delta_db": 0.3006772835322479,
              "reference_active": true
            },
            {
              "low_hz": 8000.0,
              "high_hz": 12000.0,
              "reference_power": 1.956235821234014e-05,
              "output_power": 2.256167518063155e-05,
              "delta_db": 0.6195013527411392,
              "reference_active": true
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 7,
          "band_count": 7,
          "active_band_mae_db": 0.29459135362529004,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.480703873175345,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1920
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 153,
          "expected_voiced_frames": 96,
          "expected_unvoiced_frames": 43,
          "boundary_frames": 14,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 96,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": 0.06630774395975517,
          "abs_error_cents_p95": 0.27570547700056514,
          "voiced_detection_rate": 1.0,
          "unvoiced_false_positive_rate": 0.0,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -14.613897160430058,
        "output_peak": 0.716965712242369,
        "reference_rms_dbfs": -15.094601033605402,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 4.509127961830412
      }
    },
    {
      "case": "voiced_unvoiced_boundaries_24000",
      "kind": "known_mixed",
      "method": "llsm_world_dio",
      "base_method": "world_harvest",
      "decoder_family": "LLSM layer0",
      "f0_source": "WORLD DIO+StoneMask",
      "native_metadata": {
        "method": "llsm-layer0-czt-external-f0",
        "sample_rate": 24000,
        "input_samples": 38400,
        "output_samples": 38400,
        "native_output_samples": 38640,
        "trimmed_tail_samples": 240,
        "fixed_delay_samples": 0,
        "hop_seconds": 0.005,
        "seed": 0,
        "f0_refine": false,
        "native_rng_seed": 1,
        "rng": "libc srand/rand; same pinned runtime only",
        "normalization": "none",
        "residual_waveform_bypass": false,
        "noise_band_edges_hz": [
          2000,
          4000,
          8000
        ]
      },
      "status": "measured",
      "seconds": 0.15393687799951294,
      "rtf": 0.09621054874969559,
      "output_sha256": "38cd704a23fe8f182497768bec5209d9972348aa0172eb285e19a214514ace01",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 38400,
        "output_samples": 38400,
        "length_delta_samples": 0,
        "sample_rate": 24000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 120,
            "hop_samples": 30,
            "log_magnitude_mae_db": 3.059880912434063,
            "spectral_convergence": 0.26271914602824253,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.4829081495669723e-06
          },
          {
            "window_ms": 20,
            "window_samples": 480,
            "hop_samples": 120,
            "log_magnitude_mae_db": 2.6604655584028882,
            "spectral_convergence": 0.24627144356286396,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.0451655225896614e-06
          },
          {
            "window_ms": 80,
            "window_samples": 1920,
            "hop_samples": 480,
            "log_magnitude_mae_db": 3.170211496234489,
            "spectral_convergence": 0.3010962775520265,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.0421143003023435e-06
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.017949668611672003,
              "output_power": 0.017669699027947412,
              "delta_db": -0.06827282874375426,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.00305335715464887,
              "output_power": 0.0029940031647446726,
              "delta_db": -0.08525352119360816,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.0023364217946556785,
              "output_power": 0.00236549600047083,
              "delta_db": 0.05370969308675463,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.0018669016013489377,
              "output_power": 0.0018935800573756094,
              "delta_db": 0.061622428605799744,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.0027969227390688516,
              "output_power": 0.0027613412575388276,
              "delta_db": -0.05560387986527363,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 0.0029185612082491936,
              "output_power": 0.002929557663306984,
              "delta_db": 0.016332449751611494,
              "reference_active": true
            },
            {
              "low_hz": 8000.0,
              "high_hz": 12000.0,
              "reference_power": 1.956235821234014e-05,
              "output_power": 1.8306622321141035e-05,
              "delta_db": -0.2881298532073686,
              "reference_active": true
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 7,
          "band_count": 7,
          "active_band_mae_db": 0.08984637920773865,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": -0.04364773069551278,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1920
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 153,
          "expected_voiced_frames": 96,
          "expected_unvoiced_frames": 43,
          "boundary_frames": 14,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 96,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": 0.0474007413511441,
          "abs_error_cents_p95": 0.1419838997672521,
          "voiced_detection_rate": 1.0,
          "unvoiced_false_positive_rate": 0.0,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -15.138248764300915,
        "output_peak": 0.6693952882111804,
        "reference_rms_dbfs": -15.094601033605402,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 2.963519322357147
      }
    },
    {
      "case": "silence_24000",
      "kind": "silence",
      "method": "identity",
      "base_method": "world_harvest",
      "decoder_family": "none",
      "f0_source": null,
      "role": "measurement_sanity_only_not_a_vocoder",
      "status": "measured",
      "seconds": 1.7976999515667558e-05,
      "rtf": 2.2471249394584447e-05,
      "output_sha256": "0c5cc90b079d0d9c1ded1376357d23a9782a704a83e01731f50ccd162e246492",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 19200,
        "output_samples": 19200,
        "length_delta_samples": 0,
        "sample_rate": 24000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 120,
            "hop_samples": 30,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": null,
            "spectral_convergence_status": "zero_reference_energy",
            "amplitude_floor": 1e-10
          },
          {
            "window_ms": 20,
            "window_samples": 480,
            "hop_samples": 120,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": null,
            "spectral_convergence_status": "zero_reference_energy",
            "amplitude_floor": 1e-10
          },
          {
            "window_ms": 80,
            "window_samples": 1920,
            "hop_samples": 480,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": null,
            "spectral_convergence_status": "zero_reference_energy",
            "amplitude_floor": 1e-10
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.0,
              "output_power": 0.0,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.0,
              "output_power": 0.0,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.0,
              "output_power": 0.0,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.0,
              "output_power": 0.0,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.0,
              "output_power": 0.0,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 0.0,
              "output_power": 0.0,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 8000.0,
              "high_hz": 12000.0,
              "reference_power": 0.0,
              "output_power": 0.0,
              "delta_db": 0.0,
              "reference_active": false
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 0,
          "band_count": 7,
          "active_band_mae_db": null,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "no_active_reference_bands"
        },
        "rms_gain_error_db": null,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1920
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 73,
          "expected_voiced_frames": 0,
          "expected_unvoiced_frames": 73,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 0,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": null,
          "abs_error_cents_p95": null,
          "voiced_detection_rate": null,
          "unvoiced_false_positive_rate": 0.0,
          "score_status": "no_valid_voiced_frames",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -120.0,
        "output_peak": 0.0,
        "reference_rms_dbfs": -120.0,
        "rms_gain_status": "zero_reference_energy",
        "mr_stft_log_magnitude_mae_db": 0.0
      }
    },
    {
      "case": "silence_24000",
      "kind": "silence",
      "method": "world_dio",
      "base_method": "world_harvest",
      "decoder_family": "WORLD",
      "f0_source": "WORLD DIO+StoneMask",
      "native_length_policy": "C API synthesizes requested n_samples directly; no crop/pad",
      "feature_scalars": 165347,
      "feature_f0_voiced_fraction": 0.0,
      "status": "measured",
      "seconds": 0.0398557560001791,
      "rtf": 0.049819695000223874,
      "output_sha256": "2d361c2cf80dabe49975b379a3e598122144ae11bb6672dfdf5cc1ef8e5e24f8",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 19200,
        "output_samples": 19200,
        "length_delta_samples": 0,
        "sample_rate": 24000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 120,
            "hop_samples": 30,
            "log_magnitude_mae_db": 19.028678728571307,
            "spectral_convergence": null,
            "spectral_convergence_status": "zero_reference_energy",
            "amplitude_floor": 1e-10
          },
          {
            "window_ms": 20,
            "window_samples": 480,
            "hop_samples": 120,
            "log_magnitude_mae_db": 13.158867190328365,
            "spectral_convergence": null,
            "spectral_convergence_status": "zero_reference_energy",
            "amplitude_floor": 1e-10
          },
          {
            "window_ms": 80,
            "window_samples": 1920,
            "hop_samples": 480,
            "log_magnitude_mae_db": 7.501575546213296,
            "spectral_convergence": null,
            "spectral_convergence_status": "zero_reference_energy",
            "amplitude_floor": 1e-10
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.0,
              "output_power": 3.455918808987866e-19,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.0,
              "output_power": 2.6616980211908185e-18,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.0,
              "output_power": 4.9668902825171075e-18,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.0,
              "output_power": 9.944557714436772e-18,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.0,
              "output_power": 2.109986247351003e-17,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 0.0,
              "output_power": 4.196468107394715e-17,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 8000.0,
              "high_hz": 12000.0,
              "reference_power": 0.0,
              "output_power": 4.0945970334981966e-17,
              "delta_db": 0.0,
              "reference_active": false
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 0,
          "band_count": 7,
          "active_band_mae_db": null,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "no_active_reference_bands"
        },
        "rms_gain_error_db": null,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1920
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 73,
          "expected_voiced_frames": 0,
          "expected_unvoiced_frames": 73,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 0,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": null,
          "abs_error_cents_p95": null,
          "voiced_detection_rate": null,
          "unvoiced_false_positive_rate": 0.0,
          "score_status": "no_valid_voiced_frames",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -120.0,
        "output_peak": 4.209181639406699e-08,
        "reference_rms_dbfs": -120.0,
        "rms_gain_status": "zero_reference_energy",
        "mr_stft_log_magnitude_mae_db": 13.229707155037657
      }
    },
    {
      "case": "silence_24000",
      "kind": "silence",
      "method": "world_harvest",
      "base_method": "world_harvest",
      "decoder_family": "WORLD",
      "f0_source": "WORLD Harvest",
      "native_length_policy": "C API synthesizes requested n_samples directly; no crop/pad",
      "feature_scalars": 165347,
      "feature_f0_voiced_fraction": 0.0,
      "status": "measured",
      "seconds": 0.08584100299776765,
      "rtf": 0.10730125374720956,
      "output_sha256": "2d361c2cf80dabe49975b379a3e598122144ae11bb6672dfdf5cc1ef8e5e24f8",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 19200,
        "output_samples": 19200,
        "length_delta_samples": 0,
        "sample_rate": 24000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 120,
            "hop_samples": 30,
            "log_magnitude_mae_db": 19.028678728571307,
            "spectral_convergence": null,
            "spectral_convergence_status": "zero_reference_energy",
            "amplitude_floor": 1e-10
          },
          {
            "window_ms": 20,
            "window_samples": 480,
            "hop_samples": 120,
            "log_magnitude_mae_db": 13.158867190328365,
            "spectral_convergence": null,
            "spectral_convergence_status": "zero_reference_energy",
            "amplitude_floor": 1e-10
          },
          {
            "window_ms": 80,
            "window_samples": 1920,
            "hop_samples": 480,
            "log_magnitude_mae_db": 7.501575546213296,
            "spectral_convergence": null,
            "spectral_convergence_status": "zero_reference_energy",
            "amplitude_floor": 1e-10
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.0,
              "output_power": 3.455918808987866e-19,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.0,
              "output_power": 2.6616980211908185e-18,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.0,
              "output_power": 4.9668902825171075e-18,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.0,
              "output_power": 9.944557714436772e-18,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.0,
              "output_power": 2.109986247351003e-17,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 0.0,
              "output_power": 4.196468107394715e-17,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 8000.0,
              "high_hz": 12000.0,
              "reference_power": 0.0,
              "output_power": 4.0945970334981966e-17,
              "delta_db": 0.0,
              "reference_active": false
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 0,
          "band_count": 7,
          "active_band_mae_db": null,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "no_active_reference_bands"
        },
        "rms_gain_error_db": null,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1920
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 73,
          "expected_voiced_frames": 0,
          "expected_unvoiced_frames": 73,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 0,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": null,
          "abs_error_cents_p95": null,
          "voiced_detection_rate": null,
          "unvoiced_false_positive_rate": 0.0,
          "score_status": "no_valid_voiced_frames",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -120.0,
        "output_peak": 4.209181639406699e-08,
        "reference_rms_dbfs": -120.0,
        "rms_gain_status": "zero_reference_energy",
        "mr_stft_log_magnitude_mae_db": 13.229707155037657
      }
    },
    {
      "case": "silence_24000",
      "kind": "silence",
      "method": "llsm_world_dio",
      "base_method": "world_harvest",
      "decoder_family": "LLSM layer0",
      "f0_source": "WORLD DIO+StoneMask",
      "native_metadata": {
        "method": "llsm-layer0-czt-external-f0",
        "sample_rate": 24000,
        "input_samples": 19200,
        "output_samples": 19200,
        "native_output_samples": 19440,
        "trimmed_tail_samples": 240,
        "fixed_delay_samples": 0,
        "hop_seconds": 0.005,
        "seed": 0,
        "f0_refine": false,
        "native_rng_seed": 1,
        "rng": "libc srand/rand; same pinned runtime only",
        "normalization": "none",
        "residual_waveform_bypass": false,
        "noise_band_edges_hz": [
          2000,
          4000,
          8000
        ]
      },
      "status": "measured",
      "seconds": 0.05953219799994258,
      "rtf": 0.07441524749992823,
      "output_sha256": "e6cb4a503d24eaa1402631f1b4670e44274d72b0dd54e78481db89c008f56edd",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 19200,
        "output_samples": 19200,
        "length_delta_samples": 0,
        "sample_rate": 24000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 120,
            "hop_samples": 30,
            "log_magnitude_mae_db": 77.02190719770066,
            "spectral_convergence": null,
            "spectral_convergence_status": "zero_reference_energy",
            "amplitude_floor": 1e-10
          },
          {
            "window_ms": 20,
            "window_samples": 480,
            "hop_samples": 120,
            "log_magnitude_mae_db": 70.99758202249681,
            "spectral_convergence": null,
            "spectral_convergence_status": "zero_reference_energy",
            "amplitude_floor": 1e-10
          },
          {
            "window_ms": 80,
            "window_samples": 1920,
            "hop_samples": 480,
            "log_magnitude_mae_db": 64.55866443287584,
            "spectral_convergence": null,
            "spectral_convergence_status": "zero_reference_energy",
            "amplitude_floor": 1e-10
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.0,
              "output_power": 1.0229496040163504e-12,
              "delta_db": 0.09854238563843133,
              "reference_active": false
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.0,
              "output_power": 1.6074991365678043e-12,
              "delta_db": 2.0615074832475813,
              "reference_active": false
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.0,
              "output_power": 3.0311381906340416e-12,
              "delta_db": 4.81605736453974,
              "reference_active": false
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.0,
              "output_power": 5.718660370512886e-12,
              "delta_db": 7.572943046963445,
              "reference_active": false
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.0,
              "output_power": 1.0618257323287206e-11,
              "delta_db": 10.260532458431078,
              "reference_active": false
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 0.0,
              "output_power": 2.2417536253892557e-11,
              "delta_db": 13.505878807774847,
              "reference_active": false
            },
            {
              "low_hz": 8000.0,
              "high_hz": 12000.0,
              "reference_power": 0.0,
              "output_power": 2.1909976432357345e-11,
              "delta_db": 13.406419104085984,
              "reference_active": false
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 0,
          "band_count": 7,
          "active_band_mae_db": null,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "no_active_reference_bands"
        },
        "rms_gain_error_db": null,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1920
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 73,
          "expected_voiced_frames": 0,
          "expected_unvoiced_frames": 73,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 0,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": null,
          "abs_error_cents_p95": null,
          "voiced_detection_rate": null,
          "unvoiced_false_positive_rate": 0.0,
          "score_status": "no_valid_voiced_frames",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -101.78316080067354,
        "output_peak": 3.108248356736695e-05,
        "reference_rms_dbfs": -120.0,
        "rms_gain_status": "zero_reference_energy",
        "mr_stft_log_magnitude_mae_db": 70.85938455102443
      }
    },
    {
      "case": "impulse_24000",
      "kind": "transient_diagnostic",
      "method": "identity",
      "base_method": "world_harvest",
      "decoder_family": "none",
      "f0_source": null,
      "role": "measurement_sanity_only_not_a_vocoder",
      "status": "measured",
      "seconds": 2.3564000002807006e-05,
      "rtf": 2.9455000003508758e-05,
      "output_sha256": "9309e0381e14d19fca6fd91df56d4a0b68496cf0e44f37a1c4ec5afac0a5c1e2",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 19200,
        "output_samples": 19200,
        "length_delta_samples": 0,
        "sample_rate": 24000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 120,
            "hop_samples": 30,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 8.333333333333335e-08
          },
          {
            "window_ms": 20,
            "window_samples": 480,
            "hop_samples": 120,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 2.0833333333333338e-08
          },
          {
            "window_ms": 80,
            "window_samples": 1920,
            "hop_samples": 480,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 5.2083333333333345e-09
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 2.1633572048611113e-07,
              "output_power": 2.1633572048611113e-07,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 3.2552083333333327e-07,
              "output_power": 3.2552083333333327e-07,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 5.425347222222223e-07,
              "output_power": 5.425347222222223e-07,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 1.0850694444444447e-06,
              "output_power": 1.0850694444444447e-06,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 2.1701388888888893e-06,
              "output_power": 2.1701388888888893e-06,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 4.340277777777779e-06,
              "output_power": 4.340277777777779e-06,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 8000.0,
              "high_hz": 12000.0,
              "reference_power": 4.340955946180557e-06,
              "output_power": 4.340955946180557e-06,
              "delta_db": 0.0,
              "reference_active": true
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 7,
          "band_count": 7,
          "active_band_mae_db": 0.0,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.0,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1920
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 73,
          "expected_voiced_frames": 0,
          "expected_unvoiced_frames": 73,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 0,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": null,
          "abs_error_cents_p95": null,
          "voiced_detection_rate": null,
          "unvoiced_false_positive_rate": 0.0,
          "score_status": "no_valid_voiced_frames",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -48.85361220031512,
        "output_peak": 0.5,
        "reference_rms_dbfs": -48.85361220031512,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 0.0
      },
      "event": {
        "status": "peak_energy_diagnostic",
        "expected_s": 0.3,
        "detected_s": 0.29754166666666665,
        "error_ms": -2.45833333333334
      }
    },
    {
      "case": "impulse_24000",
      "kind": "transient_diagnostic",
      "method": "world_dio",
      "base_method": "world_harvest",
      "decoder_family": "WORLD",
      "f0_source": "WORLD DIO+StoneMask",
      "native_length_policy": "C API synthesizes requested n_samples directly; no crop/pad",
      "feature_scalars": 165347,
      "feature_f0_voiced_fraction": 0.0,
      "status": "measured",
      "seconds": 0.05638625199935632,
      "rtf": 0.0704828149991954,
      "output_sha256": "35f4de69e5274a30e85211c2940a23948c0d677df06139ec932ccdc58097c617",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 19200,
        "output_samples": 19200,
        "length_delta_samples": 0,
        "sample_rate": 24000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 120,
            "hop_samples": 30,
            "log_magnitude_mae_db": 1.1681951312607597,
            "spectral_convergence": 1.1045854011877658,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 8.333333333333335e-08
          },
          {
            "window_ms": 20,
            "window_samples": 480,
            "hop_samples": 120,
            "log_magnitude_mae_db": 1.4019153298638243,
            "spectral_convergence": 0.7580984964560649,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 2.0833333333333338e-08
          },
          {
            "window_ms": 80,
            "window_samples": 1920,
            "hop_samples": 480,
            "log_magnitude_mae_db": 3.1798645861167447,
            "spectral_convergence": 0.7182694836670888,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 5.2083333333333345e-09
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 2.1633572048611113e-07,
              "output_power": 4.67786699713638e-08,
              "delta_db": -6.650803646965486,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 3.2552083333333327e-07,
              "output_power": 3.2494238652554516e-07,
              "delta_db": -0.007724228372952574,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 5.425347222222223e-07,
              "output_power": 6.4615943972178e-07,
              "delta_db": 0.7591215504426418,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 1.0850694444444447e-06,
              "output_power": 1.981864728537747e-06,
              "delta_db": 2.616164746267436,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 2.1701388888888893e-06,
              "output_power": 4.998715943047576e-06,
              "delta_db": 3.623709286576301,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 4.340277777777779e-06,
              "output_power": 6.877226010207271e-06,
              "delta_db": 1.9989577179539144,
              "reference_active": true
            },
            {
              "low_hz": 8000.0,
              "high_hz": 12000.0,
              "reference_power": 4.340955946180557e-06,
              "output_power": 1.085849401373254e-05,
              "delta_db": 3.981842177977302,
              "reference_active": true
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 7,
          "band_count": 7,
          "active_band_mae_db": 2.805474764936576,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 2.958715744881248,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1920
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 73,
          "expected_voiced_frames": 0,
          "expected_unvoiced_frames": 73,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 0,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": null,
          "abs_error_cents_p95": null,
          "voiced_detection_rate": null,
          "unvoiced_false_positive_rate": 0.0,
          "score_status": "no_valid_voiced_frames",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -45.89489645543387,
        "output_peak": 0.17285704611746683,
        "reference_rms_dbfs": -48.85361220031512,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 1.9166583490804427
      },
      "event": {
        "status": "peak_energy_diagnostic",
        "expected_s": 0.3,
        "detected_s": 0.301,
        "error_ms": 1.0000000000000009
      }
    },
    {
      "case": "impulse_24000",
      "kind": "transient_diagnostic",
      "method": "world_harvest",
      "base_method": "world_harvest",
      "decoder_family": "WORLD",
      "f0_source": "WORLD Harvest",
      "native_length_policy": "C API synthesizes requested n_samples directly; no crop/pad",
      "feature_scalars": 165347,
      "feature_f0_voiced_fraction": 0.0,
      "status": "measured",
      "seconds": 0.10037952499988023,
      "rtf": 0.1254744062498503,
      "output_sha256": "35f4de69e5274a30e85211c2940a23948c0d677df06139ec932ccdc58097c617",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 19200,
        "output_samples": 19200,
        "length_delta_samples": 0,
        "sample_rate": 24000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 120,
            "hop_samples": 30,
            "log_magnitude_mae_db": 1.1681951312607597,
            "spectral_convergence": 1.1045854011877658,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 8.333333333333335e-08
          },
          {
            "window_ms": 20,
            "window_samples": 480,
            "hop_samples": 120,
            "log_magnitude_mae_db": 1.4019153298638243,
            "spectral_convergence": 0.7580984964560649,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 2.0833333333333338e-08
          },
          {
            "window_ms": 80,
            "window_samples": 1920,
            "hop_samples": 480,
            "log_magnitude_mae_db": 3.1798645861167447,
            "spectral_convergence": 0.7182694836670888,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 5.2083333333333345e-09
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 2.1633572048611113e-07,
              "output_power": 4.67786699713638e-08,
              "delta_db": -6.650803646965486,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 3.2552083333333327e-07,
              "output_power": 3.2494238652554516e-07,
              "delta_db": -0.007724228372952574,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 5.425347222222223e-07,
              "output_power": 6.4615943972178e-07,
              "delta_db": 0.7591215504426418,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 1.0850694444444447e-06,
              "output_power": 1.981864728537747e-06,
              "delta_db": 2.616164746267436,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 2.1701388888888893e-06,
              "output_power": 4.998715943047576e-06,
              "delta_db": 3.623709286576301,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 4.340277777777779e-06,
              "output_power": 6.877226010207271e-06,
              "delta_db": 1.9989577179539144,
              "reference_active": true
            },
            {
              "low_hz": 8000.0,
              "high_hz": 12000.0,
              "reference_power": 4.340955946180557e-06,
              "output_power": 1.085849401373254e-05,
              "delta_db": 3.981842177977302,
              "reference_active": true
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 7,
          "band_count": 7,
          "active_band_mae_db": 2.805474764936576,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 2.958715744881248,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1920
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 73,
          "expected_voiced_frames": 0,
          "expected_unvoiced_frames": 73,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 0,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": null,
          "abs_error_cents_p95": null,
          "voiced_detection_rate": null,
          "unvoiced_false_positive_rate": 0.0,
          "score_status": "no_valid_voiced_frames",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -45.89489645543387,
        "output_peak": 0.17285704611746683,
        "reference_rms_dbfs": -48.85361220031512,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 1.9166583490804427
      },
      "event": {
        "status": "peak_energy_diagnostic",
        "expected_s": 0.3,
        "detected_s": 0.301,
        "error_ms": 1.0000000000000009
      }
    },
    {
      "case": "impulse_24000",
      "kind": "transient_diagnostic",
      "method": "llsm_world_dio",
      "base_method": "world_harvest",
      "decoder_family": "LLSM layer0",
      "f0_source": "WORLD DIO+StoneMask",
      "native_metadata": {
        "method": "llsm-layer0-czt-external-f0",
        "sample_rate": 24000,
        "input_samples": 19200,
        "output_samples": 19200,
        "native_output_samples": 19440,
        "trimmed_tail_samples": 240,
        "fixed_delay_samples": 0,
        "hop_seconds": 0.005,
        "seed": 0,
        "f0_refine": false,
        "native_rng_seed": 1,
        "rng": "libc srand/rand; same pinned runtime only",
        "normalization": "none",
        "residual_waveform_bypass": false,
        "noise_band_edges_hz": [
          2000,
          4000,
          8000
        ]
      },
      "status": "measured",
      "seconds": 0.02702274699913687,
      "rtf": 0.03377843374892109,
      "output_sha256": "e591868320d33785c405351e6a07c9754b0c16e858fc9209f96423ed8832f7cf",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 19200,
        "output_samples": 19200,
        "length_delta_samples": 0,
        "sample_rate": 24000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 120,
            "hop_samples": 30,
            "log_magnitude_mae_db": 20.246694943376912,
            "spectral_convergence": 0.8570090220584113,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 8.333333333333335e-08
          },
          {
            "window_ms": 20,
            "window_samples": 480,
            "hop_samples": 120,
            "log_magnitude_mae_db": 25.500919575050006,
            "spectral_convergence": 0.4275607832664799,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 2.0833333333333338e-08
          },
          {
            "window_ms": 80,
            "window_samples": 1920,
            "hop_samples": 480,
            "log_magnitude_mae_db": 29.74066577047396,
            "spectral_convergence": 0.3920359675846591,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 5.2083333333333345e-09
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 2.1633572048611113e-07,
              "output_power": 1.7849549069661754e-07,
              "delta_db": -0.8350098524820984,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 3.2552083333333327e-07,
              "output_power": 3.7725380656364877e-07,
              "delta_db": 0.6405484194427156,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 5.425347222222223e-07,
              "output_power": 6.018267588220802e-07,
              "delta_db": 0.4504395546690862,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 1.0850694444444447e-06,
              "output_power": 1.1909447618403295e-06,
              "delta_db": 0.40434084670001746,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 2.1701388888888893e-06,
              "output_power": 2.308344231820145e-06,
              "delta_db": 0.268130438903952,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 4.340277777777779e-06,
              "output_power": 4.517223450479458e-06,
              "delta_db": 0.1735404879939154,
              "reference_active": true
            },
            {
              "low_hz": 8000.0,
              "high_hz": 12000.0,
              "reference_power": 4.340955946180557e-06,
              "output_power": 4.697443094586617e-06,
              "delta_db": 0.34276149246008913,
              "reference_active": true
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 7,
          "band_count": 7,
          "active_band_mae_db": 0.44496729895026776,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.27485635427175786,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1920
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 73,
          "expected_voiced_frames": 0,
          "expected_unvoiced_frames": 73,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 0,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": null,
          "abs_error_cents_p95": null,
          "voiced_detection_rate": null,
          "unvoiced_false_positive_rate": 0.0,
          "score_status": "no_valid_voiced_frames",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -48.578755846043364,
        "output_peak": 0.09669748003860315,
        "reference_rms_dbfs": -48.85361220031512,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 25.162760096300293
      },
      "event": {
        "status": "peak_energy_diagnostic",
        "expected_s": 0.3,
        "detected_s": 0.3005833333333333,
        "error_ms": 0.5833333333333246
      }
    },
    {
      "case": "sine_120_48000",
      "kind": "known_periodic",
      "method": "identity",
      "base_method": "world_harvest",
      "decoder_family": "none",
      "f0_source": null,
      "role": "measurement_sanity_only_not_a_vocoder",
      "status": "measured",
      "seconds": 6.285299969022162e-05,
      "rtf": 5.237749974185135e-05,
      "output_sha256": "d0e05420f0252a6b6912880fc6d4ff0ea9dcecd62add101a2136343c912c7912",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 57600,
        "output_samples": 57600,
        "length_delta_samples": 0,
        "sample_rate": 48000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 240,
            "hop_samples": 60,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 3.941805880114473e-06
          },
          {
            "window_ms": 20,
            "window_samples": 960,
            "hop_samples": 240,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 2.2618290244702303e-06
          },
          {
            "window_ms": 80,
            "window_samples": 3840,
            "hop_samples": 960,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 2.252542032765538e-06
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.12239780857734177,
              "output_power": 0.12239780857734177,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 4.3839185584805135e-08,
              "output_power": 4.3839185584805135e-08,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 1.2501389969226049e-11,
              "output_power": 1.2501389969226049e-11,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 1.9138815548273091e-13,
              "output_power": 1.9138815548273091e-13,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 4.8072606896262115e-15,
              "output_power": 4.8072606896262115e-15,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 1.413952508919099e-16,
              "output_power": 1.413952508919099e-16,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 8000.0,
              "high_hz": 16000.0,
              "reference_power": 4.225800834967686e-18,
              "output_power": 4.225800834967686e-18,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 16000.0,
              "high_hz": 24000.0,
              "reference_power": 6.810009625368615e-20,
              "output_power": 6.810009625368615e-20,
              "delta_db": 0.0,
              "reference_active": false
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 1,
          "band_count": 8,
          "active_band_mae_db": 0.0,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.0,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 3840
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 113,
          "expected_voiced_frames": 113,
          "expected_unvoiced_frames": 0,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 113,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": 0.0049288302617261194,
          "abs_error_cents_p95": 0.005288276413549499,
          "voiced_detection_rate": 1.0,
          "unvoiced_false_positive_rate": null,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -9.122262021767263,
        "output_peak": 0.5,
        "reference_rms_dbfs": -9.122262021767263,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 0.0
      }
    },
    {
      "case": "sine_120_48000",
      "kind": "known_periodic",
      "method": "world_dio",
      "base_method": "world_harvest",
      "decoder_family": "WORLD",
      "f0_source": "WORLD DIO+StoneMask",
      "native_length_policy": "C API synthesizes requested n_samples directly; no crop/pad",
      "feature_scalars": 494291,
      "feature_f0_voiced_fraction": 0.995850622406639,
      "status": "measured",
      "seconds": 0.35179988500021864,
      "rtf": 0.29316657083351555,
      "output_sha256": "213d8fac45e684ca955f4ccb6b943f3b9b077bcc35c9b3e73cfd8b38e23be3e2",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 57600,
        "output_samples": 57600,
        "length_delta_samples": 0,
        "sample_rate": 48000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 240,
            "hop_samples": 60,
            "log_magnitude_mae_db": 10.498431178722647,
            "spectral_convergence": 0.6251482011137384,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 3.941805880114473e-06
          },
          {
            "window_ms": 20,
            "window_samples": 960,
            "hop_samples": 240,
            "log_magnitude_mae_db": 20.696622969483286,
            "spectral_convergence": 0.5622719538760806,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 2.2618290244702303e-06
          },
          {
            "window_ms": 80,
            "window_samples": 3840,
            "hop_samples": 960,
            "log_magnitude_mae_db": 10.745754175671008,
            "spectral_convergence": 0.5610553470391845,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 2.252542032765538e-06
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.12239780857734177,
              "output_power": 0.2960255758458723,
              "delta_db": 3.8355559237536383,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 4.3839185584805135e-08,
              "output_power": 0.00028596474429162593,
              "delta_db": 38.14450016089046,
              "reference_active": false
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 1.2501389969226049e-11,
              "output_power": 1.8913439314542932e-06,
              "delta_db": 51.79812207509989,
              "reference_active": false
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 1.9138815548273091e-13,
              "output_power": 8.885546034017007e-07,
              "delta_db": 59.48684121198611,
              "reference_active": false
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 4.8072606896262115e-15,
              "output_power": 4.710163239170884e-07,
              "delta_db": 56.73035958645383,
              "reference_active": false
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 1.413952508919099e-16,
              "output_power": 2.3353640531976642e-07,
              "delta_db": 53.683545910995,
              "reference_active": false
            },
            {
              "low_hz": 8000.0,
              "high_hz": 16000.0,
              "reference_power": 4.225800834967686e-18,
              "output_power": 1.3655553235165138e-07,
              "delta_db": 51.35309299650583,
              "reference_active": false
            },
            {
              "low_hz": 16000.0,
              "high_hz": 24000.0,
              "reference_power": 6.810009625368615e-20,
              "output_power": 6.775749196778493e-08,
              "delta_db": 48.30957322282657,
              "reference_active": false
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 1,
          "band_count": 8,
          "active_band_mae_db": 3.8355559237536383,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 3.8398017513714255,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 3840
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 113,
          "expected_voiced_frames": 113,
          "expected_unvoiced_frames": 0,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 113,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": 1.8060387938405813,
          "abs_error_cents_p95": 3.294177402479888,
          "voiced_detection_rate": 1.0,
          "unvoiced_false_positive_rate": null,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -5.282460270395837,
        "output_peak": 0.811877031160047,
        "reference_rms_dbfs": -9.122262021767263,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 13.980269441292315
      }
    },
    {
      "case": "sine_120_48000",
      "kind": "known_periodic",
      "method": "world_harvest",
      "base_method": "world_harvest",
      "decoder_family": "WORLD",
      "f0_source": "WORLD Harvest",
      "native_length_policy": "C API synthesizes requested n_samples directly; no crop/pad",
      "feature_scalars": 494291,
      "feature_f0_voiced_fraction": 0.012448132780082987,
      "status": "measured",
      "seconds": 0.24348743200243916,
      "rtf": 0.20290619333536597,
      "output_sha256": "49b51c9536f0f6e12d1c2db667da27b68d77918c52356fcc2f772ab1b8f7a130",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 57600,
        "output_samples": 57600,
        "length_delta_samples": 0,
        "sample_rate": 48000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 240,
            "hop_samples": 60,
            "log_magnitude_mae_db": 1.7747063305436737,
            "spectral_convergence": 0.8181459929057389,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 3.941805880114473e-06
          },
          {
            "window_ms": 20,
            "window_samples": 960,
            "hop_samples": 240,
            "log_magnitude_mae_db": 3.776170308420204,
            "spectral_convergence": 1.0923749870882447,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 2.2618290244702303e-06
          },
          {
            "window_ms": 80,
            "window_samples": 3840,
            "hop_samples": 960,
            "log_magnitude_mae_db": 4.152727580850237,
            "spectral_convergence": 1.2087176649274747,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 2.252542032765538e-06
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.12239780857734177,
              "output_power": 0.014029867883876536,
              "delta_db": -9.407200608333733,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 4.3839185584805135e-08,
              "output_power": 0.07357760260776489,
              "delta_db": 62.24883155512978,
              "reference_active": false
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 1.2501389969226049e-11,
              "output_power": 0.00131853715974355,
              "delta_db": 80.23134071028791,
              "reference_active": false
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 1.9138815548273091e-13,
              "output_power": 4.5237157494292736e-07,
              "delta_db": 56.55495307939372,
              "reference_active": false
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 4.8072606896262115e-15,
              "output_power": 2.5376443801920317e-08,
              "delta_db": 44.04430760965365,
              "reference_active": false
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 1.413952508919099e-16,
              "output_power": 4.974355833762239e-09,
              "delta_db": 36.96736848708746,
              "reference_active": false
            },
            {
              "low_hz": 8000.0,
              "high_hz": 16000.0,
              "reference_power": 4.225800834967686e-18,
              "output_power": 2.558766400542249e-09,
              "delta_db": 34.080306393118605,
              "reference_active": false
            },
            {
              "low_hz": 16000.0,
              "high_hz": 24000.0,
              "reference_power": 6.810009625368615e-20,
              "output_power": 1.2700357374399165e-09,
              "delta_db": 31.038159417075985,
              "reference_active": false
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 1,
          "band_count": 8,
          "active_band_mae_db": 9.407200608333733,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": -1.387426265971619,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 3840
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 113,
          "expected_voiced_frames": 113,
          "expected_unvoiced_frames": 0,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 0,
          "missing_voiced_frames": 113,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": null,
          "abs_error_cents_p95": null,
          "voiced_detection_rate": 0.0,
          "unvoiced_false_positive_rate": null,
          "score_status": "no_valid_voiced_frames",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -10.50968828773888,
        "output_peak": 1.4810724048631574,
        "reference_rms_dbfs": -9.122262021767263,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 3.234534739938038
      }
    },
    {
      "case": "sine_120_48000",
      "kind": "known_periodic",
      "method": "llsm_world_dio",
      "base_method": "world_harvest",
      "decoder_family": "LLSM layer0",
      "f0_source": "WORLD DIO+StoneMask",
      "native_metadata": {
        "method": "llsm-layer0-czt-external-f0",
        "sample_rate": 48000,
        "input_samples": 57600,
        "output_samples": 57600,
        "native_output_samples": 58080,
        "trimmed_tail_samples": 480,
        "fixed_delay_samples": 0,
        "hop_seconds": 0.005,
        "seed": 0,
        "f0_refine": false,
        "native_rng_seed": 1,
        "rng": "libc srand/rand; same pinned runtime only",
        "normalization": "none",
        "residual_waveform_bypass": false,
        "noise_band_edges_hz": [
          2000,
          4000,
          8000
        ]
      },
      "status": "measured",
      "seconds": 0.3355761349994282,
      "rtf": 0.2796467791661902,
      "output_sha256": "d919ea1dd616714fa3797f6523cb95d1b559ddf67d05738c9b55e2501b65950b",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 57600,
        "output_samples": 57600,
        "length_delta_samples": 0,
        "sample_rate": 48000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 240,
            "hop_samples": 60,
            "log_magnitude_mae_db": 0.47556731071901504,
            "spectral_convergence": 0.018663953770791046,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 3.941805880114473e-06
          },
          {
            "window_ms": 20,
            "window_samples": 960,
            "hop_samples": 240,
            "log_magnitude_mae_db": 0.798957839071366,
            "spectral_convergence": 0.015073013859611697,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 2.2618290244702303e-06
          },
          {
            "window_ms": 80,
            "window_samples": 3840,
            "hop_samples": 960,
            "log_magnitude_mae_db": 1.1818780594636407,
            "spectral_convergence": 0.013633788853371142,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 2.252542032765538e-06
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.12239780857734177,
              "output_power": 0.12183131647736907,
              "delta_db": -0.02014705119388894,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 4.3839185584805135e-08,
              "output_power": 3.927968451413308e-06,
              "delta_db": 19.52305513452686,
              "reference_active": false
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 1.2501389969226049e-11,
              "output_power": 1.4102913742585077e-07,
              "delta_db": 40.52350546847534,
              "reference_active": false
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 1.9138815548273091e-13,
              "output_power": 1.5290479032452877e-07,
              "delta_db": 51.844210915530695,
              "reference_active": false
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 4.8072606896262115e-15,
              "output_power": 1.0933180314548555e-07,
              "delta_db": 50.38746510728703,
              "reference_active": false
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 1.413952508919099e-16,
              "output_power": 3.4949220272157385e-08,
              "delta_db": 45.43437490946453,
              "reference_active": false
            },
            {
              "low_hz": 8000.0,
              "high_hz": 16000.0,
              "reference_power": 4.225800834967686e-18,
              "output_power": 2.170899982745312e-08,
              "delta_db": 43.366398151898416,
              "reference_active": false
            },
            {
              "low_hz": 16000.0,
              "high_hz": 24000.0,
              "reference_power": 6.810009625368615e-20,
              "output_power": 1.0282238968076793e-08,
              "delta_db": 40.120876930255776,
              "reference_active": false
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 1,
          "band_count": 8,
          "active_band_mae_db": 0.02014705119388894,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": -0.019991827391727245,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 3840
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 113,
          "expected_voiced_frames": 113,
          "expected_unvoiced_frames": 0,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 113,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": 0.04525960150895871,
          "abs_error_cents_p95": 0.18870591542554793,
          "voiced_detection_rate": 1.0,
          "unvoiced_false_positive_rate": null,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -9.142253849158989,
        "output_peak": 0.5202904646673733,
        "reference_rms_dbfs": -9.122262021767263,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 0.8188010697513407
      }
    },
    {
      "case": "harmonic_110_48000",
      "kind": "known_periodic",
      "method": "identity",
      "base_method": "world_harvest",
      "decoder_family": "none",
      "f0_source": null,
      "role": "measurement_sanity_only_not_a_vocoder",
      "status": "measured",
      "seconds": 7.237599857035093e-05,
      "rtf": 6.031333214195911e-05,
      "output_sha256": "1ab9199432f997d1a4cbd902d9433ab5ea4859cedd44ee1a86c6ea7758c9f333",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 57600,
        "output_samples": 57600,
        "length_delta_samples": 0,
        "sample_rate": 48000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 240,
            "hop_samples": 60,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 2.976031976226823e-06
          },
          {
            "window_ms": 20,
            "window_samples": 960,
            "hop_samples": 240,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.5995292608606799e-06
          },
          {
            "window_ms": 80,
            "window_samples": 3840,
            "hop_samples": 960,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.5800429985876247e-06
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.051478291260778665,
              "output_power": 0.051478291260778665,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.01284224448528195,
              "output_power": 0.01284224448528195,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.0019988789077755287,
              "output_power": 0.0019988789077755287,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.000574029237132317,
              "output_power": 0.000574029237132317,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.00020006592032709576,
              "output_power": 0.00020006592032709576,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 4.818756876905675e-05,
              "output_power": 4.818756876905675e-05,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 8000.0,
              "high_hz": 16000.0,
              "reference_power": 1.18414332675984e-17,
              "output_power": 1.18414332675984e-17,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 16000.0,
              "high_hz": 24000.0,
              "reference_power": 1.9747985191787345e-19,
              "output_power": 1.9747985191787345e-19,
              "delta_db": 0.0,
              "reference_active": false
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 6,
          "band_count": 8,
          "active_band_mae_db": 0.0,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.0,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 3840
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 113,
          "expected_voiced_frames": 113,
          "expected_unvoiced_frames": 0,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 113,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": 0.0033589365806560682,
          "abs_error_cents_p95": 0.0035056793480827135,
          "voiced_detection_rate": 1.0,
          "unvoiced_false_positive_rate": null,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -11.730076837392167,
        "output_peak": 0.6,
        "reference_rms_dbfs": -11.730076837392167,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 0.0
      }
    },
    {
      "case": "harmonic_110_48000",
      "kind": "known_periodic",
      "method": "world_dio",
      "base_method": "world_harvest",
      "decoder_family": "WORLD",
      "f0_source": "WORLD DIO+StoneMask",
      "native_length_policy": "C API synthesizes requested n_samples directly; no crop/pad",
      "feature_scalars": 494291,
      "feature_f0_voiced_fraction": 0.995850622406639,
      "status": "measured",
      "seconds": 0.3198795979988063,
      "rtf": 0.2665663316656719,
      "output_sha256": "5c366685e3c8ae1d4156665ac029e438db07728fa6ef17357b7021113454773c",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 57600,
        "output_samples": 57600,
        "length_delta_samples": 0,
        "sample_rate": 48000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 240,
            "hop_samples": 60,
            "log_magnitude_mae_db": 4.971658813739379,
            "spectral_convergence": 0.5669430477243621,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 2.976031976226823e-06
          },
          {
            "window_ms": 20,
            "window_samples": 960,
            "hop_samples": 240,
            "log_magnitude_mae_db": 1.0998215026078517,
            "spectral_convergence": 0.14731130809292856,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.5995292608606799e-06
          },
          {
            "window_ms": 80,
            "window_samples": 3840,
            "hop_samples": 960,
            "log_magnitude_mae_db": 1.6327369970630303,
            "spectral_convergence": 0.08206179424534794,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.5800429985876247e-06
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.051478291260778665,
              "output_power": 0.06078397169214874,
              "delta_db": 0.7216495119074997,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.01284224448528195,
              "output_power": 0.012578534930756852,
              "delta_db": -0.09010873431819574,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.0019988789077755287,
              "output_power": 0.0019067304490359327,
              "delta_db": -0.20497183348815537,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.000574029237132317,
              "output_power": 0.0005470446702222011,
              "delta_db": -0.20911221837514893,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.00020006592032709576,
              "output_power": 0.00019108900209024204,
              "delta_db": -0.19937423800129156,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 4.818756876905675e-05,
              "output_power": 4.828817899090816e-05,
              "delta_db": 0.00905812725531264,
              "reference_active": true
            },
            {
              "low_hz": 8000.0,
              "high_hz": 16000.0,
              "reference_power": 1.18414332675984e-17,
              "output_power": 1.3450654355349826e-09,
              "delta_db": 31.28743412665934,
              "reference_active": false
            },
            {
              "low_hz": 16000.0,
              "high_hz": 24000.0,
              "reference_power": 1.9747985191787345e-19,
              "output_power": 6.45767723703966e-10,
              "delta_db": 28.100763346304113,
              "reference_active": false
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 6,
          "band_count": 8,
          "active_band_mae_db": 0.23904577722426734,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.5413922839055688,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 3840
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 113,
          "expected_voiced_frames": 113,
          "expected_unvoiced_frames": 0,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 113,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": 0.016426507376902304,
          "abs_error_cents_p95": 0.08368072790550149,
          "voiced_detection_rate": 1.0,
          "unvoiced_false_positive_rate": null,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -11.188684553486599,
        "output_peak": 0.562994979094525,
        "reference_rms_dbfs": -11.730076837392167,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 2.5680724378034205
      }
    },
    {
      "case": "harmonic_110_48000",
      "kind": "known_periodic",
      "method": "world_harvest",
      "base_method": "world_harvest",
      "decoder_family": "WORLD",
      "f0_source": "WORLD Harvest",
      "native_length_policy": "C API synthesizes requested n_samples directly; no crop/pad",
      "feature_scalars": 494291,
      "feature_f0_voiced_fraction": 1.0,
      "status": "measured",
      "seconds": 0.5155416560010053,
      "rtf": 0.42961804666750447,
      "output_sha256": "3816416d9e66a14afcf995f496aa9c97a598cbd7a1563e0ac2abd528c051de64",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 57600,
        "output_samples": 57600,
        "length_delta_samples": 0,
        "sample_rate": 48000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 240,
            "hop_samples": 60,
            "log_magnitude_mae_db": 5.036251686811312,
            "spectral_convergence": 0.5117117165928537,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 2.976031976226823e-06
          },
          {
            "window_ms": 20,
            "window_samples": 960,
            "hop_samples": 240,
            "log_magnitude_mae_db": 1.149089819088135,
            "spectral_convergence": 0.11921116264449252,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.5995292608606799e-06
          },
          {
            "window_ms": 80,
            "window_samples": 3840,
            "hop_samples": 960,
            "log_magnitude_mae_db": 1.8689565520471143,
            "spectral_convergence": 0.07943041142239844,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.5800429985876247e-06
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.051478291260778665,
              "output_power": 0.060829683394021596,
              "delta_db": 0.7249143329183728,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.01284224448528195,
              "output_power": 0.012599194265960036,
              "delta_db": -0.0829816123906711,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.0019988789077755287,
              "output_power": 0.0019115368872421683,
              "delta_db": -0.1940380223675941,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.000574029237132317,
              "output_power": 0.0005479367470161564,
              "delta_db": -0.20203585874631147,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.00020006592032709576,
              "output_power": 0.00019136300674962273,
              "delta_db": -0.19315130130886654,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 4.818756876905675e-05,
              "output_power": 4.869224158182012e-05,
              "delta_db": 0.045247528777702176,
              "reference_active": true
            },
            {
              "low_hz": 8000.0,
              "high_hz": 16000.0,
              "reference_power": 1.18414332675984e-17,
              "output_power": 1.9389778535810125e-10,
              "delta_db": 22.87572848726726,
              "reference_active": false
            },
            {
              "low_hz": 16000.0,
              "high_hz": 24000.0,
              "reference_power": 1.9747985191787345e-19,
              "output_power": 8.38878686815418e-11,
              "delta_db": 19.23699160523587,
              "reference_active": false
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 6,
          "band_count": 8,
          "active_band_mae_db": 0.2403947760849197,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.5455442491611537,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 3840
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 113,
          "expected_voiced_frames": 113,
          "expected_unvoiced_frames": 0,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 113,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": 0.009845554414006214,
          "abs_error_cents_p95": 0.08762627888820824,
          "voiced_detection_rate": 1.0,
          "unvoiced_false_positive_rate": null,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -11.184532588231015,
        "output_peak": 0.5584699852155033,
        "reference_rms_dbfs": -11.730076837392167,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 2.68476601931552
      }
    },
    {
      "case": "harmonic_110_48000",
      "kind": "known_periodic",
      "method": "llsm_world_dio",
      "base_method": "world_harvest",
      "decoder_family": "LLSM layer0",
      "f0_source": "WORLD DIO+StoneMask",
      "native_metadata": {
        "method": "llsm-layer0-czt-external-f0",
        "sample_rate": 48000,
        "input_samples": 57600,
        "output_samples": 57600,
        "native_output_samples": 58080,
        "trimmed_tail_samples": 480,
        "fixed_delay_samples": 0,
        "hop_seconds": 0.005,
        "seed": 0,
        "f0_refine": false,
        "native_rng_seed": 1,
        "rng": "libc srand/rand; same pinned runtime only",
        "normalization": "none",
        "residual_waveform_bypass": false,
        "noise_band_edges_hz": [
          2000,
          4000,
          8000
        ]
      },
      "status": "measured",
      "seconds": 0.32365263500105357,
      "rtf": 0.2697105291675447,
      "output_sha256": "7e4e8b00dc0daa803a110cd830ac3b9f87dd536564e2f06e0a121fe16aa8914f",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 57600,
        "output_samples": 57600,
        "length_delta_samples": 0,
        "sample_rate": 48000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 240,
            "hop_samples": 60,
            "log_magnitude_mae_db": 0.2875520614700949,
            "spectral_convergence": 0.030054452145562044,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 2.976031976226823e-06
          },
          {
            "window_ms": 20,
            "window_samples": 960,
            "hop_samples": 240,
            "log_magnitude_mae_db": 0.29897202200648954,
            "spectral_convergence": 0.02454145925412432,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.5995292608606799e-06
          },
          {
            "window_ms": 80,
            "window_samples": 3840,
            "hop_samples": 960,
            "log_magnitude_mae_db": 0.417977433726385,
            "spectral_convergence": 0.02001235823605405,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.5800429985876247e-06
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.051478291260778665,
              "output_power": 0.05115778737313767,
              "delta_db": -0.02712370233319088,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.01284224448528195,
              "output_power": 0.012754784981660371,
              "delta_db": -0.02967791842668495,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.0019988789077755287,
              "output_power": 0.0019813530381864453,
              "delta_db": -0.03824620146731801,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.000574029237132317,
              "output_power": 0.0005706166432021657,
              "delta_db": -0.025895783655717916,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.00020006592032709576,
              "output_power": 0.00019856135509394019,
              "delta_db": -0.032783882167557656,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 4.818756876905675e-05,
              "output_power": 4.777014140295365e-05,
              "delta_db": -0.03778488355089693,
              "reference_active": true
            },
            {
              "low_hz": 8000.0,
              "high_hz": 16000.0,
              "reference_power": 1.18414332675984e-17,
              "output_power": 8.560453989755622e-10,
              "delta_db": 29.32496797389472,
              "reference_active": false
            },
            {
              "low_hz": 16000.0,
              "high_hz": 24000.0,
              "reference_power": 1.9747985191787345e-19,
              "output_power": 3.987725047064637e-10,
              "delta_db": 26.00725206144336,
              "reference_active": false
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 6,
          "band_count": 8,
          "active_band_mae_db": 0.03191872860022772,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": -0.02795680616537738,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 3840
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 113,
          "expected_voiced_frames": 113,
          "expected_unvoiced_frames": 0,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 113,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": 0.010778125384729588,
          "abs_error_cents_p95": 0.061323603894383474,
          "voiced_detection_rate": 1.0,
          "unvoiced_false_positive_rate": null,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -11.758033643557544,
        "output_peak": 0.6049014852223312,
        "reference_rms_dbfs": -11.730076837392167,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 0.33483383906765646
      }
    },
    {
      "case": "harmonic_220_48000",
      "kind": "known_periodic",
      "method": "identity",
      "base_method": "world_harvest",
      "decoder_family": "none",
      "f0_source": null,
      "role": "measurement_sanity_only_not_a_vocoder",
      "status": "measured",
      "seconds": 9.872600276139565e-05,
      "rtf": 8.227166896782971e-05,
      "output_sha256": "a93ec90389ba3dcb2b6cd87e9e6669196b37ae18fbfe801185aec3cc600490fe",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 57600,
        "output_samples": 57600,
        "length_delta_samples": 0,
        "sample_rate": 48000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 240,
            "hop_samples": 60,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.8828945713001331e-06
          },
          {
            "window_ms": 20,
            "window_samples": 960,
            "hop_samples": 240,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.4859793167314665e-06
          },
          {
            "window_ms": 80,
            "window_samples": 3840,
            "hop_samples": 960,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.4840813497420889e-06
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 5.4841924970992106e-05,
              "output_power": 5.4841924970992106e-05,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.061841111531313796,
              "output_power": 0.061841111531313796,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.004499315567952621,
              "output_power": 0.004499315567952621,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.002063945986683421,
              "output_power": 0.002063945986683421,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.0005923797075262987,
              "output_power": 0.0005923797075262987,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 0.00014628837300187047,
              "output_power": 0.00014628837300187047,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 8000.0,
              "high_hz": 16000.0,
              "reference_power": 1.4627755375778767e-18,
              "output_power": 1.4627755375778767e-18,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 16000.0,
              "high_hz": 24000.0,
              "reference_power": 5.18330972539492e-20,
              "output_power": 5.18330972539492e-20,
              "delta_db": 0.0,
              "reference_active": false
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 6,
          "band_count": 8,
          "active_band_mae_db": 0.0,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.0,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 3840
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 113,
          "expected_voiced_frames": 113,
          "expected_unvoiced_frames": 0,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 113,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": 0.017461330431862,
          "abs_error_cents_p95": 0.017960775383457236,
          "voiced_detection_rate": 1.0,
          "unvoiced_false_positive_rate": null,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -11.599071913201911,
        "output_peak": 0.6,
        "reference_rms_dbfs": -11.599071913201911,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 0.0
      }
    },
    {
      "case": "harmonic_220_48000",
      "kind": "known_periodic",
      "method": "world_dio",
      "base_method": "world_harvest",
      "decoder_family": "WORLD",
      "f0_source": "WORLD DIO+StoneMask",
      "native_length_policy": "C API synthesizes requested n_samples directly; no crop/pad",
      "feature_scalars": 494291,
      "feature_f0_voiced_fraction": 0.995850622406639,
      "status": "measured",
      "seconds": 0.3014919640008884,
      "rtf": 0.2512433033340737,
      "output_sha256": "d0a5ad7af5696e85c516fc7161999bec455e828c3a08797b21666c0ad2928cbd",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 57600,
        "output_samples": 57600,
        "length_delta_samples": 0,
        "sample_rate": 48000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 240,
            "hop_samples": 60,
            "log_magnitude_mae_db": 2.4474825987843625,
            "spectral_convergence": 0.5446065824740258,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.8828945713001331e-06
          },
          {
            "window_ms": 20,
            "window_samples": 960,
            "hop_samples": 240,
            "log_magnitude_mae_db": 0.8878833461452733,
            "spectral_convergence": 0.07977596492517226,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.4859793167314665e-06
          },
          {
            "window_ms": 80,
            "window_samples": 3840,
            "hop_samples": 960,
            "log_magnitude_mae_db": 3.6351602473515214,
            "spectral_convergence": 0.07658942989974114,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.4840813497420889e-06
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 5.4841924970992106e-05,
              "output_power": 9.299544232534837e-05,
              "delta_db": 2.293489741771083,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.061841111531313796,
              "output_power": 0.0711074313598327,
              "delta_db": 0.6063770375901072,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.004499315567952621,
              "output_power": 0.0043003109192763945,
              "delta_db": -0.19646597401176633,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.002063945986683421,
              "output_power": 0.0019854431155412484,
              "delta_db": -0.16840878938656015,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.0005923797075262987,
              "output_power": 0.0005706643207370483,
              "delta_db": -0.162194526800668,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 0.00014628837300187047,
              "output_power": 0.00015414924308356336,
              "delta_db": 0.22731586782104257,
              "reference_active": true
            },
            {
              "low_hz": 8000.0,
              "high_hz": 16000.0,
              "reference_power": 1.4627755375778767e-18,
              "output_power": 5.872837663604265e-11,
              "delta_db": 17.688479962839118,
              "reference_active": false
            },
            {
              "low_hz": 16000.0,
              "high_hz": 24000.0,
              "reference_power": 5.18330972539492e-20,
              "output_power": 2.5254506924300806e-11,
              "delta_db": 14.023388936503572,
              "reference_active": false
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 6,
          "band_count": 8,
          "active_band_mae_db": 0.6090419895635378,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.5317499947523294,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 3840
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 113,
          "expected_voiced_frames": 113,
          "expected_unvoiced_frames": 0,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 113,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": 0.03583697182345329,
          "abs_error_cents_p95": 0.09145220722642143,
          "voiced_detection_rate": 1.0,
          "unvoiced_false_positive_rate": null,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -11.06732191844958,
        "output_peak": 0.5979798031515531,
        "reference_rms_dbfs": -11.599071913201911,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 2.323508730760386
      }
    },
    {
      "case": "harmonic_220_48000",
      "kind": "known_periodic",
      "method": "world_harvest",
      "base_method": "world_harvest",
      "decoder_family": "WORLD",
      "f0_source": "WORLD Harvest",
      "native_length_policy": "C API synthesizes requested n_samples directly; no crop/pad",
      "feature_scalars": 494291,
      "feature_f0_voiced_fraction": 1.0,
      "status": "measured",
      "seconds": 0.41168798900253023,
      "rtf": 0.34307332416877523,
      "output_sha256": "fe74e0515a9afcfcca00a3021b6c71dff0d8948534c1bd93b1dbffd91f89bc2b",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 57600,
        "output_samples": 57600,
        "length_delta_samples": 0,
        "sample_rate": 48000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 240,
            "hop_samples": 60,
            "log_magnitude_mae_db": 2.5637788297224295,
            "spectral_convergence": 0.36529557656710354,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.8828945713001331e-06
          },
          {
            "window_ms": 20,
            "window_samples": 960,
            "hop_samples": 240,
            "log_magnitude_mae_db": 0.8827761510390946,
            "spectral_convergence": 0.07816611858293973,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.4859793167314665e-06
          },
          {
            "window_ms": 80,
            "window_samples": 3840,
            "hop_samples": 960,
            "log_magnitude_mae_db": 3.4151421119412886,
            "spectral_convergence": 0.07641485861423773,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.4840813497420889e-06
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 5.4841924970992106e-05,
              "output_power": 8.814548055510168e-05,
              "delta_db": 2.0608735953887667,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.061841111531313796,
              "output_power": 0.07109587028667069,
              "delta_db": 0.6056708781364137,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.004499315567952621,
              "output_power": 0.0042982838176263884,
              "delta_db": -0.19851365529946718,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.002063945986683421,
              "output_power": 0.001984399686340464,
              "delta_db": -0.17069177930433643,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.0005923797075262987,
              "output_power": 0.0005703676088765074,
              "delta_db": -0.16445318974091158,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 0.00014628837300187047,
              "output_power": 0.0001533440451472346,
              "delta_db": 0.2045710578849168,
              "reference_active": true
            },
            {
              "low_hz": 8000.0,
              "high_hz": 16000.0,
              "reference_power": 1.4627755375778767e-18,
              "output_power": 1.5162972793592945e-10,
              "delta_db": 21.807843557343002,
              "reference_active": false
            },
            {
              "low_hz": 16000.0,
              "high_hz": 24000.0,
              "reference_power": 5.18330972539492e-20,
              "output_power": 7.672330438523249e-11,
              "delta_db": 18.84927299133522,
              "reference_active": false
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 6,
          "band_count": 8,
          "active_band_mae_db": 0.5674623592924687,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.5306068813412086,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 3840
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 113,
          "expected_voiced_frames": 113,
          "expected_unvoiced_frames": 0,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 113,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": 0.04762934751253936,
          "abs_error_cents_p95": 0.09478619393529844,
          "voiced_detection_rate": 1.0,
          "unvoiced_false_positive_rate": null,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -11.0684650318607,
        "output_peak": 0.5937319395597005,
        "reference_rms_dbfs": -11.599071913201911,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 2.287232364234271
      }
    },
    {
      "case": "harmonic_220_48000",
      "kind": "known_periodic",
      "method": "llsm_world_dio",
      "base_method": "world_harvest",
      "decoder_family": "LLSM layer0",
      "f0_source": "WORLD DIO+StoneMask",
      "native_metadata": {
        "method": "llsm-layer0-czt-external-f0",
        "sample_rate": 48000,
        "input_samples": 57600,
        "output_samples": 57600,
        "native_output_samples": 58080,
        "trimmed_tail_samples": 480,
        "fixed_delay_samples": 0,
        "hop_seconds": 0.005,
        "seed": 0,
        "f0_refine": false,
        "native_rng_seed": 1,
        "rng": "libc srand/rand; same pinned runtime only",
        "normalization": "none",
        "residual_waveform_bypass": false,
        "noise_band_edges_hz": [
          2000,
          4000,
          8000
        ]
      },
      "status": "measured",
      "seconds": 0.18464159300128813,
      "rtf": 0.1538679941677401,
      "output_sha256": "0b533344bd4c5cc301914c141e0a32021fe01362dc6d7279ece857ef549ab03d",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 57600,
        "output_samples": 57600,
        "length_delta_samples": 0,
        "sample_rate": 48000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 240,
            "hop_samples": 60,
            "log_magnitude_mae_db": 0.14679531671382426,
            "spectral_convergence": 0.013640619494367028,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.8828945713001331e-06
          },
          {
            "window_ms": 20,
            "window_samples": 960,
            "hop_samples": 240,
            "log_magnitude_mae_db": 0.1876268770436714,
            "spectral_convergence": 0.0111642269117407,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.4859793167314665e-06
          },
          {
            "window_ms": 80,
            "window_samples": 3840,
            "hop_samples": 960,
            "log_magnitude_mae_db": 0.8709588947895066,
            "spectral_convergence": 0.010843957052984167,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.4840813497420889e-06
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 5.4841924970992106e-05,
              "output_power": 3.521886008564907e-05,
              "delta_db": -1.9233739504719773,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.061841111531313796,
              "output_power": 0.061579371781306486,
              "delta_db": -0.018420329670309613,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.004499315567952621,
              "output_power": 0.004476947051247831,
              "delta_db": -0.021644962706915818,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.002063945986683421,
              "output_power": 0.0020532552013235762,
              "delta_db": -0.0225539598960834,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.0005923797075262987,
              "output_power": 0.0005888139334665195,
              "delta_db": -0.026220945462634013,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 0.00014628837300187047,
              "output_power": 0.0001456213660785418,
              "delta_db": -0.019847089121022846,
              "reference_active": true
            },
            {
              "low_hz": 8000.0,
              "high_hz": 16000.0,
              "reference_power": 1.4627755375778767e-18,
              "output_power": 4.330415198268465e-10,
              "delta_db": 26.365295383099927,
              "reference_active": false
            },
            {
              "low_hz": 16000.0,
              "high_hz": 24000.0,
              "reference_power": 5.18330972539492e-20,
              "output_power": 2.2584768703881094e-10,
              "delta_db": 23.538156472045863,
              "reference_active": false
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 6,
          "band_count": 8,
          "active_band_mae_db": 0.3386768728881571,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": -0.02004532415150051,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 3840
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 113,
          "expected_voiced_frames": 113,
          "expected_unvoiced_frames": 0,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 113,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": 0.01919224814824719,
          "abs_error_cents_p95": 0.03920435744388278,
          "voiced_detection_rate": 1.0,
          "unvoiced_false_positive_rate": null,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -11.619117237353409,
        "output_peak": 0.6009964228240774,
        "reference_rms_dbfs": -11.599071913201911,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 0.40179369618233407
      }
    },
    {
      "case": "missing_fundamental_150_48000",
      "kind": "known_periodic",
      "method": "identity",
      "base_method": "world_harvest",
      "decoder_family": "none",
      "f0_source": null,
      "role": "measurement_sanity_only_not_a_vocoder",
      "status": "measured",
      "seconds": 6.988400127738714e-05,
      "rtf": 5.8236667731155954e-05,
      "output_sha256": "8aafc28385d6d4e38246dab34f0b0417be040fb7cf6d22e9b91a539bcf8ca6ef",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 57600,
        "output_samples": 57600,
        "length_delta_samples": 0,
        "sample_rate": 48000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 240,
            "hop_samples": 60,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.6784923452864682e-06
          },
          {
            "window_ms": 20,
            "window_samples": 960,
            "hop_samples": 240,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 9.594546200811072e-07
          },
          {
            "window_ms": 80,
            "window_samples": 3840,
            "hop_samples": 960,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 9.594546200810943e-07
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 2.013947075921961e-09,
              "output_power": 2.013947075921961e-09,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.026039799719722992,
              "output_power": 0.026039799719722992,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.009394375763728136,
              "output_power": 0.009394375763728136,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.005733112306803246,
              "output_power": 0.005733112306803246,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.0006884000038671073,
              "output_power": 0.0006884000038671073,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 1.2347614644895594e-15,
              "output_power": 1.2347614644895594e-15,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 8000.0,
              "high_hz": 16000.0,
              "reference_power": 1.3212581182706175e-17,
              "output_power": 1.3212581182706175e-17,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 16000.0,
              "high_hz": 24000.0,
              "reference_power": 2.673896070224589e-19,
              "output_power": 2.673896070224589e-19,
              "delta_db": 0.0,
              "reference_active": false
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 4,
          "band_count": 8,
          "active_band_mae_db": 0.0,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.0,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 3840
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 113,
          "expected_voiced_frames": 113,
          "expected_unvoiced_frames": 0,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 113,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": 0.008408297691095995,
          "abs_error_cents_p95": 0.008408297692249224,
          "voiced_detection_rate": 1.0,
          "unvoiced_false_positive_rate": null,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -13.782454962302342,
        "output_peak": 0.6,
        "reference_rms_dbfs": -13.782454962302342,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 0.0
      }
    },
    {
      "case": "missing_fundamental_150_48000",
      "kind": "known_periodic",
      "method": "world_dio",
      "base_method": "world_harvest",
      "decoder_family": "WORLD",
      "f0_source": "WORLD DIO+StoneMask",
      "native_length_policy": "C API synthesizes requested n_samples directly; no crop/pad",
      "feature_scalars": 494291,
      "feature_f0_voiced_fraction": 0.995850622406639,
      "status": "measured",
      "seconds": 0.28041500100152916,
      "rtf": 0.23367916750127432,
      "output_sha256": "501f4d73ec350a3d3bd8b74155a6f54eeb280c3cef3d8e235b7321b3ad7799d7",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 57600,
        "output_samples": 57600,
        "length_delta_samples": 0,
        "sample_rate": 48000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 240,
            "hop_samples": 60,
            "log_magnitude_mae_db": 2.4562314610151703,
            "spectral_convergence": 0.6472242028131194,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.6784923452864682e-06
          },
          {
            "window_ms": 20,
            "window_samples": 960,
            "hop_samples": 240,
            "log_magnitude_mae_db": 3.0138212035087393,
            "spectral_convergence": 0.579190157564675,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 9.594546200811072e-07
          },
          {
            "window_ms": 80,
            "window_samples": 3840,
            "hop_samples": 960,
            "log_magnitude_mae_db": 6.930041503081395,
            "spectral_convergence": 0.942210827078771,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 9.594546200810943e-07
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 2.013947075921961e-09,
              "output_power": 0.00017112254239357727,
              "delta_db": 49.29259170353283,
              "reference_active": false
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.026039799719722992,
              "output_power": 0.024914382410392972,
              "delta_db": -0.19187513472232454,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.009394375763728136,
              "output_power": 0.015196671048884182,
              "delta_db": 2.088805352670597,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.005733112306803246,
              "output_power": 0.005232900648909312,
              "delta_db": -0.3964795995216618,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.0006884000038671073,
              "output_power": 0.0013714005958920222,
              "delta_db": 2.9932346974101165,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 1.2347614644895594e-15,
              "output_power": 1.1745029600248894e-10,
              "delta_db": 20.698541156396836,
              "reference_active": false
            },
            {
              "low_hz": 8000.0,
              "high_hz": 16000.0,
              "reference_power": 1.3212581182706175e-17,
              "output_power": 4.510007837562614e-11,
              "delta_db": 16.541772966024034,
              "reference_active": false
            },
            {
              "low_hz": 16000.0,
              "high_hz": 24000.0,
              "reference_power": 2.673896070224589e-19,
              "output_power": 2.1988448312937385e-11,
              "delta_db": 13.42194583025821,
              "reference_active": false
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 4,
          "band_count": 8,
          "active_band_mae_db": 1.4175986960811748,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.49293101761990243,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 3840
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 113,
          "expected_voiced_frames": 113,
          "expected_unvoiced_frames": 0,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 58,
          "missing_voiced_frames": 55,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 58,
          "abs_error_cents_median": 1207.277261706749,
          "abs_error_cents_p95": 1210.061911741183,
          "voiced_detection_rate": 0.5132743362831859,
          "unvoiced_false_positive_rate": null,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -13.289523944682438,
        "output_peak": 0.8677939965813004,
        "reference_rms_dbfs": -13.782454962302342,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 4.133364722535101
      }
    },
    {
      "case": "missing_fundamental_150_48000",
      "kind": "known_periodic",
      "method": "world_harvest",
      "base_method": "world_harvest",
      "decoder_family": "WORLD",
      "f0_source": "WORLD Harvest",
      "native_length_policy": "C API synthesizes requested n_samples directly; no crop/pad",
      "feature_scalars": 494291,
      "feature_f0_voiced_fraction": 0.0,
      "status": "measured",
      "seconds": 0.17182475799927488,
      "rtf": 0.14318729833272908,
      "output_sha256": "2adc2b8b09701c505a13bbecf876e83edffe9b3bc0b8a96c170f2c2e53eca261",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 57600,
        "output_samples": 57600,
        "length_delta_samples": 0,
        "sample_rate": 48000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 240,
            "hop_samples": 60,
            "log_magnitude_mae_db": 2.621716898034722,
            "spectral_convergence": 0.8573483737113294,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.6784923452864682e-06
          },
          {
            "window_ms": 20,
            "window_samples": 960,
            "hop_samples": 240,
            "log_magnitude_mae_db": 3.544239279956558,
            "spectral_convergence": 0.75025437806203,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 9.594546200811072e-07
          },
          {
            "window_ms": 80,
            "window_samples": 3840,
            "hop_samples": 960,
            "log_magnitude_mae_db": 7.341046833736045,
            "spectral_convergence": 1.165302340932898,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 9.594546200810943e-07
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 2.013947075921961e-09,
              "output_power": 0.0041146423080960365,
              "delta_db": 63.10284033694374,
              "reference_active": false
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.026039799719722992,
              "output_power": 0.025791908660353895,
              "delta_db": -0.04154157499558859,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.009394375763728136,
              "output_power": 0.014398701769377884,
              "delta_db": 1.8545540910130245,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.005733112306803246,
              "output_power": 0.00569487631353409,
              "delta_db": -0.029061532003824116,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.0006884000038671073,
              "output_power": 0.001552608491532211,
              "delta_db": 3.5322109298372535,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 1.2347614644895594e-15,
              "output_power": 4.554500410517051e-10,
              "delta_db": 26.584407455559894,
              "reference_active": false
            },
            {
              "low_hz": 8000.0,
              "high_hz": 16000.0,
              "reference_power": 1.3212581182706175e-17,
              "output_power": 4.607510029937341e-11,
              "delta_db": 16.63466289293542,
              "reference_active": false
            },
            {
              "low_hz": 16000.0,
              "high_hz": 24000.0,
              "reference_power": 2.673896070224589e-19,
              "output_power": 9.38914255730278e-12,
              "delta_db": 9.726259330930606,
              "reference_active": false
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 4,
          "band_count": 8,
          "active_band_mae_db": 1.3643420319624227,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.9049723258267833,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 3840
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 113,
          "expected_voiced_frames": 113,
          "expected_unvoiced_frames": 0,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 0,
          "missing_voiced_frames": 113,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": null,
          "abs_error_cents_p95": null,
          "voiced_detection_rate": 0.0,
          "unvoiced_false_positive_rate": null,
          "score_status": "no_valid_voiced_frames",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -12.877482636475559,
        "output_peak": 1.2236004515924952,
        "reference_rms_dbfs": -13.782454962302342,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 4.502334337242441
      }
    },
    {
      "case": "missing_fundamental_150_48000",
      "kind": "known_periodic",
      "method": "llsm_world_dio",
      "base_method": "world_harvest",
      "decoder_family": "LLSM layer0",
      "f0_source": "WORLD DIO+StoneMask",
      "native_metadata": {
        "method": "llsm-layer0-czt-external-f0",
        "sample_rate": 48000,
        "input_samples": 57600,
        "output_samples": 57600,
        "native_output_samples": 58080,
        "trimmed_tail_samples": 480,
        "fixed_delay_samples": 0,
        "hop_seconds": 0.005,
        "seed": 0,
        "f0_refine": false,
        "native_rng_seed": 1,
        "rng": "libc srand/rand; same pinned runtime only",
        "normalization": "none",
        "residual_waveform_bypass": false,
        "noise_band_edges_hz": [
          2000,
          4000,
          8000
        ]
      },
      "status": "measured",
      "seconds": 0.18369809599971632,
      "rtf": 0.15308174666643026,
      "output_sha256": "516991ce87f7b5f5677210019188fc8d98010d9c183d2991bbfe870f7ec3d611",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 57600,
        "output_samples": 57600,
        "length_delta_samples": 0,
        "sample_rate": 48000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 240,
            "hop_samples": 60,
            "log_magnitude_mae_db": 18.835330400406683,
            "spectral_convergence": 0.601428180469712,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.6784923452864682e-06
          },
          {
            "window_ms": 20,
            "window_samples": 960,
            "hop_samples": 240,
            "log_magnitude_mae_db": 24.80141108417982,
            "spectral_convergence": 0.3629943219970974,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 9.594546200811072e-07
          },
          {
            "window_ms": 80,
            "window_samples": 3840,
            "hop_samples": 960,
            "log_magnitude_mae_db": 23.991659382505354,
            "spectral_convergence": 0.6213871656785768,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 9.594546200810943e-07
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 2.013947075921961e-09,
              "output_power": 0.00014531567200463713,
              "delta_db": 48.58264400978161,
              "reference_active": false
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.026039799719722992,
              "output_power": 0.021882260131462893,
              "delta_db": -0.7554546308901253,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.009394375763728136,
              "output_power": 0.00964498683423137,
              "delta_db": 0.11433711700629236,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.005733112306803246,
              "output_power": 0.004233569551663371,
              "delta_db": -1.3168375029725006,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.0006884000038671073,
              "output_power": 0.0004760650865625314,
              "delta_db": -1.6017453153733288,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 1.2347614644895594e-15,
              "output_power": 2.779693495414134e-07,
              "delta_db": 54.439969108141355,
              "reference_active": false
            },
            {
              "low_hz": 8000.0,
              "high_hz": 16000.0,
              "reference_power": 1.3212581182706175e-17,
              "output_power": 1.6495226269809671e-07,
              "delta_db": 52.17358277265768,
              "reference_active": false
            },
            {
              "low_hz": 16000.0,
              "high_hz": 24000.0,
              "reference_power": 2.673896070224589e-19,
              "output_power": 7.793074073929744e-08,
              "delta_db": 48.91708804270243,
              "reference_active": false
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 4,
          "band_count": 8,
          "active_band_mae_db": 0.9470936415605617,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": -0.6085936198306352,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 3840
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 113,
          "expected_voiced_frames": 113,
          "expected_unvoiced_frames": 0,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 0,
          "missing_voiced_frames": 113,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": null,
          "abs_error_cents_p95": null,
          "voiced_detection_rate": 0.0,
          "unvoiced_false_positive_rate": null,
          "score_status": "no_valid_voiced_frames",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -14.391048582132978,
        "output_peak": 0.8267952593867086,
        "reference_rms_dbfs": -13.782454962302342,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 22.54280028903062
      }
    },
    {
      "case": "harmonic_sweep_90_240_48000",
      "kind": "known_periodic_sweep",
      "method": "identity",
      "base_method": "world_harvest",
      "decoder_family": "none",
      "f0_source": null,
      "role": "measurement_sanity_only_not_a_vocoder",
      "status": "measured",
      "seconds": 9.086399950319901e-05,
      "rtf": 6.057599966879934e-05,
      "output_sha256": "b9342d670a49ef90a6cd9954b388daa5a78f583026b9d5c56ed716907d998c3e",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 72000,
        "output_samples": 72000,
        "length_delta_samples": 0,
        "sample_rate": 48000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 240,
            "hop_samples": 60,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 3.55150508956732e-06
          },
          {
            "window_ms": 20,
            "window_samples": 960,
            "hop_samples": 240,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.8137636805643976e-06
          },
          {
            "window_ms": 80,
            "window_samples": 3840,
            "hop_samples": 960,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.7818726325739977e-06
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.04239413506753674,
              "output_power": 0.04239413506753674,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.031064259628998756,
              "output_power": 0.031064259628998756,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.003072830805318983,
              "output_power": 0.003072830805318983,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.0009910936221402817,
              "output_power": 0.0009910936221402817,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.00024486526471175564,
              "output_power": 0.00024486526471175564,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 1.1356011487650316e-05,
              "output_power": 1.1356011487650316e-05,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 8000.0,
              "high_hz": 16000.0,
              "reference_power": 6.167684438722045e-18,
              "output_power": 6.167684438722045e-18,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 16000.0,
              "high_hz": 24000.0,
              "reference_power": 7.92407301634303e-20,
              "output_power": 7.92407301634303e-20,
              "delta_db": 0.0,
              "reference_active": false
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 6,
          "band_count": 8,
          "active_band_mae_db": 0.0,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.0,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 3840
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 143,
          "expected_voiced_frames": 143,
          "expected_unvoiced_frames": 0,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 143,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": 0.7520633299271753,
          "abs_error_cents_p95": 3.0660937295776733,
          "voiced_detection_rate": 1.0,
          "unvoiced_false_positive_rate": null,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -11.091402111254231,
        "output_peak": 0.6,
        "reference_rms_dbfs": -11.091402111254231,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 0.0
      }
    },
    {
      "case": "harmonic_sweep_90_240_48000",
      "kind": "known_periodic_sweep",
      "method": "world_dio",
      "base_method": "world_harvest",
      "decoder_family": "WORLD",
      "f0_source": "WORLD DIO+StoneMask",
      "native_length_policy": "C API synthesizes requested n_samples directly; no crop/pad",
      "feature_scalars": 617351,
      "feature_f0_voiced_fraction": 0.9966777408637874,
      "status": "measured",
      "seconds": 0.39414015500005917,
      "rtf": 0.2627601033333728,
      "output_sha256": "f72563f348d24ed86d8573b5fca001e0bda4efca8ef8f0513502af3f55655d5f",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 72000,
        "output_samples": 72000,
        "length_delta_samples": 0,
        "sample_rate": 48000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 240,
            "hop_samples": 60,
            "log_magnitude_mae_db": 2.636426025643756,
            "spectral_convergence": 0.44213152658782257,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 3.55150508956732e-06
          },
          {
            "window_ms": 20,
            "window_samples": 960,
            "hop_samples": 240,
            "log_magnitude_mae_db": 1.898841332029364,
            "spectral_convergence": 0.14163287479813083,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.8137636805643976e-06
          },
          {
            "window_ms": 80,
            "window_samples": 3840,
            "hop_samples": 960,
            "log_magnitude_mae_db": 1.6974335541048637,
            "spectral_convergence": 0.08780754275462525,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.7818726325739977e-06
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.04239413506753674,
              "output_power": 0.050499992309328,
              "delta_db": 0.7598553283945404,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.031064259628998756,
              "output_power": 0.03516781332186272,
              "delta_db": 0.5388435812182384,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.003072830805318983,
              "output_power": 0.0029433900651804354,
              "delta_db": -0.18690828337852267,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.0009910936221402817,
              "output_power": 0.0009563145505758541,
              "delta_db": -0.15513917655253823,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.00024486526471175564,
              "output_power": 0.0002448627912940412,
              "delta_db": -4.386890445288206e-05,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 1.1356011487650316e-05,
              "output_power": 1.8456233204911576e-05,
              "delta_db": 2.1091724592046344,
              "reference_active": true
            },
            {
              "low_hz": 8000.0,
              "high_hz": 16000.0,
              "reference_power": 6.167684438722045e-18,
              "output_power": 6.859836953350717e-10,
              "delta_db": 28.36313793388736,
              "reference_active": false
            },
            {
              "low_hz": 16000.0,
              "high_hz": 24000.0,
              "reference_power": 7.92407301634303e-20,
              "output_power": 3.440555946538189e-10,
              "delta_db": 25.366286242592224,
              "reference_active": false
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 6,
          "band_count": 8,
          "active_band_mae_db": 0.6249937829421545,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.6256562498531713,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 3840
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 143,
          "expected_voiced_frames": 143,
          "expected_unvoiced_frames": 0,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 143,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": 1.0230439112662921,
          "abs_error_cents_p95": 3.683646267571901,
          "voiced_detection_rate": 1.0,
          "unvoiced_false_positive_rate": null,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -10.46574586140106,
        "output_peak": 0.6132242361406067,
        "reference_rms_dbfs": -11.091402111254231,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 2.0775669705926614
      }
    },
    {
      "case": "harmonic_sweep_90_240_48000",
      "kind": "known_periodic_sweep",
      "method": "world_harvest",
      "base_method": "world_harvest",
      "decoder_family": "WORLD",
      "f0_source": "WORLD Harvest",
      "native_length_policy": "C API synthesizes requested n_samples directly; no crop/pad",
      "feature_scalars": 617351,
      "feature_f0_voiced_fraction": 1.0,
      "status": "measured",
      "seconds": 0.5311289870005567,
      "rtf": 0.35408599133370444,
      "output_sha256": "b1535879d33c76fdbafe5c54a8ff67f363cd82a3896d44817cf64774ad961b5a",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 72000,
        "output_samples": 72000,
        "length_delta_samples": 0,
        "sample_rate": 48000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 240,
            "hop_samples": 60,
            "log_magnitude_mae_db": 2.4797358170713415,
            "spectral_convergence": 0.4017187958460042,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 3.55150508956732e-06
          },
          {
            "window_ms": 20,
            "window_samples": 960,
            "hop_samples": 240,
            "log_magnitude_mae_db": 1.8223566379350018,
            "spectral_convergence": 0.1156361344532657,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.8137636805643976e-06
          },
          {
            "window_ms": 80,
            "window_samples": 3840,
            "hop_samples": 960,
            "log_magnitude_mae_db": 1.7202568983544053,
            "spectral_convergence": 0.0858794050508509,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.7818726325739977e-06
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.04239413506753674,
              "output_power": 0.050381801743044914,
              "delta_db": 0.7496791544442858,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.031064259628998756,
              "output_power": 0.035179729592846105,
              "delta_db": 0.5403148965102929,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.003072830805318983,
              "output_power": 0.00294234212882983,
              "delta_db": -0.1884547790880148,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.0009910936221402817,
              "output_power": 0.0009554758359672657,
              "delta_db": -0.1589497318553965,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.00024486526471175564,
              "output_power": 0.00024756615400134646,
              "delta_db": 0.047640870692978246,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 1.1356011487650316e-05,
              "output_power": 1.7977061633854515e-05,
              "delta_db": 1.9949288420943814,
              "reference_active": true
            },
            {
              "low_hz": 8000.0,
              "high_hz": 16000.0,
              "reference_power": 6.167684438722045e-18,
              "output_power": 6.439383972188684e-10,
              "delta_db": 28.088443222859276,
              "reference_active": false
            },
            {
              "low_hz": 16000.0,
              "high_hz": 24000.0,
              "reference_power": 7.92407301634303e-20,
              "output_power": 3.219815153198303e-10,
              "delta_db": 25.078309399410873,
              "reference_active": false
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 6,
          "band_count": 8,
          "active_band_mae_db": 0.6133280457808916,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.620531625542008,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 3840
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 143,
          "expected_voiced_frames": 143,
          "expected_unvoiced_frames": 0,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 143,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": 1.0040517435908793,
          "abs_error_cents_p95": 3.81281568511808,
          "voiced_detection_rate": 1.0,
          "unvoiced_false_positive_rate": null,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -10.470870485712226,
        "output_peak": 0.6089676773661677,
        "reference_rms_dbfs": -11.091402111254231,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 2.007449784453583
      }
    },
    {
      "case": "harmonic_sweep_90_240_48000",
      "kind": "known_periodic_sweep",
      "method": "llsm_world_dio",
      "base_method": "world_harvest",
      "decoder_family": "LLSM layer0",
      "f0_source": "WORLD DIO+StoneMask",
      "native_metadata": {
        "method": "llsm-layer0-czt-external-f0",
        "sample_rate": 48000,
        "input_samples": 72000,
        "output_samples": 72000,
        "native_output_samples": 72480,
        "trimmed_tail_samples": 480,
        "fixed_delay_samples": 0,
        "hop_seconds": 0.005,
        "seed": 0,
        "f0_refine": false,
        "native_rng_seed": 1,
        "rng": "libc srand/rand; same pinned runtime only",
        "normalization": "none",
        "residual_waveform_bypass": false,
        "noise_band_edges_hz": [
          2000,
          4000,
          8000
        ]
      },
      "status": "measured",
      "seconds": 0.35044966799978283,
      "rtf": 0.23363311199985523,
      "output_sha256": "5850e75979221a35c96440087ed141f415e46af61d377b0d0561190491bdfd4f",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 72000,
        "output_samples": 72000,
        "length_delta_samples": 0,
        "sample_rate": 48000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 240,
            "hop_samples": 60,
            "log_magnitude_mae_db": 0.35752409882296526,
            "spectral_convergence": 0.025601224136604876,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 3.55150508956732e-06
          },
          {
            "window_ms": 20,
            "window_samples": 960,
            "hop_samples": 240,
            "log_magnitude_mae_db": 0.4249054177202907,
            "spectral_convergence": 0.02252251531856468,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.8137636805643976e-06
          },
          {
            "window_ms": 80,
            "window_samples": 3840,
            "hop_samples": 960,
            "log_magnitude_mae_db": 0.5591744643908326,
            "spectral_convergence": 0.018471018349359526,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.7818726325739977e-06
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.04239413506753674,
              "output_power": 0.04202105600512037,
              "delta_db": -0.038388169476743554,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.031064259628998756,
              "output_power": 0.03093695974783746,
              "delta_db": -0.01783375042550477,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.003072830805318983,
              "output_power": 0.003049721416405013,
              "delta_db": -0.03278478446070981,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.0009910936221402817,
              "output_power": 0.0009842301235032512,
              "delta_db": -0.030180283985406918,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.00024486526471175564,
              "output_power": 0.00024394268642251044,
              "delta_db": -0.016393805992038206,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 1.1356011487650316e-05,
              "output_power": 1.1299004790567016e-05,
              "delta_db": -0.021856304073279736,
              "reference_active": true
            },
            {
              "low_hz": 8000.0,
              "high_hz": 16000.0,
              "reference_power": 6.167684438722045e-18,
              "output_power": 2.965155906103292e-10,
              "delta_db": 24.720475332416882,
              "reference_active": false
            },
            {
              "low_hz": 16000.0,
              "high_hz": 24000.0,
              "reference_power": 7.92407301634303e-20,
              "output_power": 1.4674280174854764e-10,
              "delta_db": 21.665568067676354,
              "reference_active": false
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 6,
          "band_count": 8,
          "active_band_mae_db": 0.0262395164022805,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": -0.029769894793097957,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 3840
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 143,
          "expected_voiced_frames": 143,
          "expected_unvoiced_frames": 0,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 143,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": 0.7651324033944452,
          "abs_error_cents_p95": 3.442678053851649,
          "voiced_detection_rate": 1.0,
          "unvoiced_false_positive_rate": null,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -11.121172006047331,
        "output_peak": 0.6161699531475585,
        "reference_rms_dbfs": -11.091402111254231,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 0.44720132697802956
      }
    },
    {
      "case": "pulse_iir_vowel_90_48000",
      "kind": "known_source_filter",
      "method": "identity",
      "base_method": "world_harvest",
      "decoder_family": "none",
      "f0_source": null,
      "role": "measurement_sanity_only_not_a_vocoder",
      "status": "measured",
      "seconds": 7.529100184910931e-05,
      "rtf": 6.274250154092442e-05,
      "output_sha256": "c983e6560d340e7b7d633aaa9b2ffce4bb316ecdf13bce489e16fd43b4c9d0d7",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 57600,
        "output_samples": 57600,
        "length_delta_samples": 0,
        "sample_rate": 48000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 240,
            "hop_samples": 60,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.544388643952995e-06
          },
          {
            "window_ms": 20,
            "window_samples": 960,
            "hop_samples": 240,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 7.568597472259627e-07
          },
          {
            "window_ms": 80,
            "window_samples": 3840,
            "hop_samples": 960,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 6.58148002312151e-07
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.00025319912849527503,
              "output_power": 0.00025319912849527503,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.0008665060581519603,
              "output_power": 0.0008665060581519603,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.01922144503644029,
              "output_power": 0.01922144503644029,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.005413878634268725,
              "output_power": 0.005413878634268725,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 2.673915483767176e-05,
              "output_power": 2.673915483767176e-05,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 7.338857218233313e-10,
              "output_power": 7.338857218233313e-10,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 8000.0,
              "high_hz": 16000.0,
              "reference_power": 1.797749457826996e-13,
              "output_power": 1.797749457826996e-13,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 16000.0,
              "high_hz": 24000.0,
              "reference_power": 7.994683551270167e-17,
              "output_power": 7.994683551270167e-17,
              "delta_db": 0.0,
              "reference_active": false
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 5,
          "band_count": 8,
          "active_band_mae_db": 0.0,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.0,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 3840
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 113,
          "expected_voiced_frames": 113,
          "expected_unvoiced_frames": 0,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 113,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": 0.005687022073118816,
          "abs_error_cents_p95": 0.05414171206447127,
          "voiced_detection_rate": 1.0,
          "unvoiced_false_positive_rate": null,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -15.8868729138951,
        "output_peak": 0.5996395620462861,
        "reference_rms_dbfs": -15.8868729138951,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 0.0
      }
    },
    {
      "case": "pulse_iir_vowel_90_48000",
      "kind": "known_source_filter",
      "method": "world_dio",
      "base_method": "world_harvest",
      "decoder_family": "WORLD",
      "f0_source": "WORLD DIO+StoneMask",
      "native_length_policy": "C API synthesizes requested n_samples directly; no crop/pad",
      "feature_scalars": 494291,
      "feature_f0_voiced_fraction": 0.995850622406639,
      "status": "measured",
      "seconds": 0.3406797479983652,
      "rtf": 0.2838997899986377,
      "output_sha256": "35e97daee9f52a3d3e231491c381d4327a7387f918394fb34f7548f28e2419c0",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 57600,
        "output_samples": 57600,
        "length_delta_samples": 0,
        "sample_rate": 48000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 240,
            "hop_samples": 60,
            "log_magnitude_mae_db": 2.5729717950020743,
            "spectral_convergence": 0.20627732993162332,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.544388643952995e-06
          },
          {
            "window_ms": 20,
            "window_samples": 960,
            "hop_samples": 240,
            "log_magnitude_mae_db": 2.7934215319191766,
            "spectral_convergence": 0.1229773631815124,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 7.568597472259627e-07
          },
          {
            "window_ms": 80,
            "window_samples": 3840,
            "hop_samples": 960,
            "log_magnitude_mae_db": 0.9277297567092851,
            "spectral_convergence": 0.11467252056794487,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 6.58148002312151e-07
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.00025319912849527503,
              "output_power": 0.00020319225535543253,
              "delta_db": -0.9555505566420759,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.0008665060581519603,
              "output_power": 0.0008281137116280488,
              "delta_db": -0.19681627814273328,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.01922144503644029,
              "output_power": 0.022129903626655664,
              "delta_db": 0.6119348852516695,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.005413878634268725,
              "output_power": 0.006069416463791222,
              "delta_db": 0.49638422661692516,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 2.673915483767176e-05,
              "output_power": 2.7435088532071947e-05,
              "delta_db": 0.11158689880365441,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 7.338857218233313e-10,
              "output_power": 1.1316206905502941e-09,
              "delta_db": 1.8807244116868582,
              "reference_active": false
            },
            {
              "low_hz": 8000.0,
              "high_hz": 16000.0,
              "reference_power": 1.797749457826996e-13,
              "output_power": 3.017140536170128e-10,
              "delta_db": 24.795955397612367,
              "reference_active": false
            },
            {
              "low_hz": 16000.0,
              "high_hz": 24000.0,
              "reference_power": 7.994683551270167e-17,
              "output_power": 1.4460371800743634e-10,
              "delta_db": 21.601794595515592,
              "reference_active": false
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 5,
          "band_count": 8,
          "active_band_mae_db": 0.47445456909141165,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.5493285801224655,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 3840
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 113,
          "expected_voiced_frames": 113,
          "expected_unvoiced_frames": 0,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 113,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": 0.022512169789634044,
          "abs_error_cents_p95": 0.04877381532995581,
          "voiced_detection_rate": 1.0,
          "unvoiced_false_positive_rate": null,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -15.337544333772634,
        "output_peak": 0.6302449381272817,
        "reference_rms_dbfs": -15.8868729138951,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 2.0980410278768455
      }
    },
    {
      "case": "pulse_iir_vowel_90_48000",
      "kind": "known_source_filter",
      "method": "world_harvest",
      "base_method": "world_harvest",
      "decoder_family": "WORLD",
      "f0_source": "WORLD Harvest",
      "native_length_policy": "C API synthesizes requested n_samples directly; no crop/pad",
      "feature_scalars": 494291,
      "feature_f0_voiced_fraction": 1.0,
      "status": "measured",
      "seconds": 0.5668302349986334,
      "rtf": 0.47235852916552784,
      "output_sha256": "14a31961670bdac79738bcdc1208c0ce75ac3ab1ae2a72bc3ae959784420e9b8",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 57600,
        "output_samples": 57600,
        "length_delta_samples": 0,
        "sample_rate": 48000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 240,
            "hop_samples": 60,
            "log_magnitude_mae_db": 2.5684402606574412,
            "spectral_convergence": 0.16748856846014276,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.544388643952995e-06
          },
          {
            "window_ms": 20,
            "window_samples": 960,
            "hop_samples": 240,
            "log_magnitude_mae_db": 2.9510637469865775,
            "spectral_convergence": 0.11973653033365315,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 7.568597472259627e-07
          },
          {
            "window_ms": 80,
            "window_samples": 3840,
            "hop_samples": 960,
            "log_magnitude_mae_db": 1.0698012672640604,
            "spectral_convergence": 0.11264368210869508,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 6.58148002312151e-07
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.00025319912849527503,
              "output_power": 0.00020253462272322046,
              "delta_db": -0.9696293120235517,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.0008665060581519603,
              "output_power": 0.0008268324752163238,
              "delta_db": -0.20354077491752703,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.01922144503644029,
              "output_power": 0.022124645665034047,
              "delta_db": 0.6109028992680273,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.005413878634268725,
              "output_power": 0.006058393318947092,
              "delta_db": 0.4884894914865281,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 2.673915483767176e-05,
              "output_power": 2.740047667960353e-05,
              "delta_db": 0.10610442097245167,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 7.338857218233313e-10,
              "output_power": 1.1468241747877346e-09,
              "delta_db": 1.9386840086969137,
              "reference_active": false
            },
            {
              "low_hz": 8000.0,
              "high_hz": 16000.0,
              "reference_power": 1.797749457826996e-13,
              "output_power": 3.222007729832021e-10,
              "delta_db": 25.08126577988651,
              "reference_active": false
            },
            {
              "low_hz": 16000.0,
              "high_hz": 24000.0,
              "reference_power": 7.994683551270167e-17,
              "output_power": 1.54386153794239e-10,
              "delta_db": 21.886083478105746,
              "reference_active": false
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 5,
          "band_count": 8,
          "active_band_mae_db": 0.4757333797336171,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.5466181064088593,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 3840
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 113,
          "expected_voiced_frames": 113,
          "expected_unvoiced_frames": 0,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 113,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": 0.009183757911153674,
          "abs_error_cents_p95": 0.15060448165097076,
          "voiced_detection_rate": 1.0,
          "unvoiced_false_positive_rate": null,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -15.34025480748624,
        "output_peak": 0.6297322581173526,
        "reference_rms_dbfs": -15.8868729138951,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 2.1964350916360265
      }
    },
    {
      "case": "pulse_iir_vowel_90_48000",
      "kind": "known_source_filter",
      "method": "llsm_world_dio",
      "base_method": "world_harvest",
      "decoder_family": "LLSM layer0",
      "f0_source": "WORLD DIO+StoneMask",
      "native_metadata": {
        "method": "llsm-layer0-czt-external-f0",
        "sample_rate": 48000,
        "input_samples": 57600,
        "output_samples": 57600,
        "native_output_samples": 58080,
        "trimmed_tail_samples": 480,
        "fixed_delay_samples": 0,
        "hop_seconds": 0.005,
        "seed": 0,
        "f0_refine": false,
        "native_rng_seed": 1,
        "rng": "libc srand/rand; same pinned runtime only",
        "normalization": "none",
        "residual_waveform_bypass": false,
        "noise_band_edges_hz": [
          2000,
          4000,
          8000
        ]
      },
      "status": "measured",
      "seconds": 0.5104241789995285,
      "rtf": 0.42535348249960714,
      "output_sha256": "60155991b391b731e218f6564d7abeaae85976026e43e171ea70df0cdbda6d02",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 57600,
        "output_samples": 57600,
        "length_delta_samples": 0,
        "sample_rate": 48000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 240,
            "hop_samples": 60,
            "log_magnitude_mae_db": 5.436323269478152,
            "spectral_convergence": 0.06663236449144296,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.544388643952995e-06
          },
          {
            "window_ms": 20,
            "window_samples": 960,
            "hop_samples": 240,
            "log_magnitude_mae_db": 6.649917914382509,
            "spectral_convergence": 0.04201230078640287,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 7.568597472259627e-07
          },
          {
            "window_ms": 80,
            "window_samples": 3840,
            "hop_samples": 960,
            "log_magnitude_mae_db": 4.529920587920148,
            "spectral_convergence": 0.04423410128468728,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 6.58148002312151e-07
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.00025319912849527503,
              "output_power": 0.00024058293942289829,
              "delta_db": -0.22197379761610125,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.0008665060581519603,
              "output_power": 0.0008608451059778949,
              "delta_db": -0.028465886316573784,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.01922144503644029,
              "output_power": 0.019075196898967934,
              "delta_db": -0.033170045539123366,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.005413878634268725,
              "output_power": 0.005371665561163145,
              "delta_db": -0.03399549988778271,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 2.673915483767176e-05,
              "output_power": 2.6536875569684428e-05,
              "delta_db": -0.032978880505665026,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 7.338857218233313e-10,
              "output_power": 4.114381444366627e-09,
              "delta_db": 7.486761143450487,
              "reference_active": false
            },
            {
              "low_hz": 8000.0,
              "high_hz": 16000.0,
              "reference_power": 1.797749457826996e-13,
              "output_power": 2.546038282213312e-09,
              "delta_db": 34.058649294154385,
              "reference_active": false
            },
            {
              "low_hz": 16000.0,
              "high_hz": 24000.0,
              "reference_power": 7.994683551270167e-17,
              "output_power": 1.1178963176722809e-09,
              "delta_db": 30.48401525597911,
              "reference_active": false
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 5,
          "band_count": 8,
          "active_band_mae_db": 0.07011682197304922,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": -0.03499865428092512,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 3840
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 113,
          "expected_voiced_frames": 113,
          "expected_unvoiced_frames": 0,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 113,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": 0.012754054672093182,
          "abs_error_cents_p95": 0.05700819944553691,
          "voiced_detection_rate": 1.0,
          "unvoiced_false_positive_rate": null,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -15.921871568176025,
        "output_peak": 0.6189409589792139,
        "reference_rms_dbfs": -15.8868729138951,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 5.538720590593603
      }
    },
    {
      "case": "am_noise_6hz_48000",
      "kind": "known_unvoiced",
      "method": "identity",
      "base_method": "world_harvest",
      "decoder_family": "none",
      "f0_source": null,
      "role": "measurement_sanity_only_not_a_vocoder",
      "status": "measured",
      "seconds": 0.00010001700138673186,
      "rtf": 6.66780009244879e-05,
      "output_sha256": "4fa720cb65bc9ca935239b4be3171f99a5ebb84951daf6bf52db77e499e42790",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 72000,
        "output_samples": 72000,
        "length_delta_samples": 0,
        "sample_rate": 48000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 240,
            "hop_samples": 60,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 6.552902439330402e-07
          },
          {
            "window_ms": 20,
            "window_samples": 960,
            "hop_samples": 240,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 3.42738569490461e-07
          },
          {
            "window_ms": 80,
            "window_samples": 3840,
            "hop_samples": 960,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.5353408899322663e-07
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 8.871501047754418e-07,
              "output_power": 8.871501047754418e-07,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.0002722044085115042,
              "output_power": 0.0002722044085115042,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.0006828458443453354,
              "output_power": 0.0006828458443453354,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.0013396582156900432,
              "output_power": 0.0013396582156900432,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.0027292042373384708,
              "output_power": 0.0027292042373384708,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 0.002855527574868151,
              "output_power": 0.002855527574868151,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 8000.0,
              "high_hz": 16000.0,
              "reference_power": 6.61838156225461e-05,
              "output_power": 6.61838156225461e-05,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 16000.0,
              "high_hz": 24000.0,
              "reference_power": 7.9884632100967e-09,
              "output_power": 7.9884632100967e-09,
              "delta_db": 0.0,
              "reference_active": true
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 8,
          "band_count": 8,
          "active_band_mae_db": 0.0,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.0,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 3840
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 143,
          "expected_voiced_frames": 0,
          "expected_unvoiced_frames": 143,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 0,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": null,
          "abs_error_cents_p95": null,
          "voiced_detection_rate": null,
          "unvoiced_false_positive_rate": 0.0,
          "score_status": "no_valid_voiced_frames",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -20.99823061039579,
        "output_peak": 0.6,
        "reference_rms_dbfs": -20.99823061039579,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 0.0
      }
    },
    {
      "case": "am_noise_6hz_48000",
      "kind": "known_unvoiced",
      "method": "world_dio",
      "base_method": "world_harvest",
      "decoder_family": "WORLD",
      "f0_source": "WORLD DIO+StoneMask",
      "native_length_policy": "C API synthesizes requested n_samples directly; no crop/pad",
      "feature_scalars": 617351,
      "feature_f0_voiced_fraction": 0.0,
      "status": "measured",
      "seconds": 0.14549415099827456,
      "rtf": 0.09699610066551638,
      "output_sha256": "a3c45eab960303c049ac81857b992956ab23b07209b1d0260a2f834470e5c23e",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 72000,
        "output_samples": 72000,
        "length_delta_samples": 0,
        "sample_rate": 48000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 240,
            "hop_samples": 60,
            "log_magnitude_mae_db": 4.931689928689678,
            "spectral_convergence": 0.635755142201903,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 6.552902439330402e-07
          },
          {
            "window_ms": 20,
            "window_samples": 960,
            "hop_samples": 240,
            "log_magnitude_mae_db": 5.0844389599547455,
            "spectral_convergence": 0.6469122239864254,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 3.42738569490461e-07
          },
          {
            "window_ms": 80,
            "window_samples": 3840,
            "hop_samples": 960,
            "log_magnitude_mae_db": 5.248794011430989,
            "spectral_convergence": 0.6581041757603057,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.5353408899322663e-07
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 8.871501047754418e-07,
              "output_power": 3.770333861488687e-05,
              "delta_db": 16.283827003286703,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.0002722044085115042,
              "output_power": 0.00030481102063345934,
              "delta_db": 0.4913551056012082,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.0006828458443453354,
              "output_power": 0.0006793769274373866,
              "delta_db": -0.02211877174574848,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.0013396582156900432,
              "output_power": 0.0013877227671350604,
              "delta_db": 0.15308701614432824,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.0027292042373384708,
              "output_power": 0.0026943250065808453,
              "delta_db": -0.05586054986813653,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 0.002855527574868151,
              "output_power": 0.0031227763776219344,
              "delta_db": 0.3885452710893479,
              "reference_active": true
            },
            {
              "low_hz": 8000.0,
              "high_hz": 16000.0,
              "reference_power": 6.61838156225461e-05,
              "output_power": 6.65748872861309e-05,
              "delta_db": 0.02558638387676834,
              "reference_active": true
            },
            {
              "low_hz": 16000.0,
              "high_hz": 24000.0,
              "reference_power": 7.9884632100967e-09,
              "output_power": 8.231862477714902e-09,
              "delta_db": 0.1303486700657059,
              "reference_active": true
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 8,
          "band_count": 8,
          "active_band_mae_db": 2.1938410964597432,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.18550361222151418,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 3840
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 143,
          "expected_voiced_frames": 0,
          "expected_unvoiced_frames": 143,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 0,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": null,
          "abs_error_cents_p95": null,
          "voiced_detection_rate": null,
          "unvoiced_false_positive_rate": 0.0,
          "score_status": "no_valid_voiced_frames",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -20.812726998174274,
        "output_peak": 0.5720091801847492,
        "reference_rms_dbfs": -20.99823061039579,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 5.088307633358471
      }
    },
    {
      "case": "am_noise_6hz_48000",
      "kind": "known_unvoiced",
      "method": "world_harvest",
      "base_method": "world_harvest",
      "decoder_family": "WORLD",
      "f0_source": "WORLD Harvest",
      "native_length_policy": "C API synthesizes requested n_samples directly; no crop/pad",
      "feature_scalars": 617351,
      "feature_f0_voiced_fraction": 0.0,
      "status": "measured",
      "seconds": 0.24791768499926548,
      "rtf": 0.165278456666177,
      "output_sha256": "a3c45eab960303c049ac81857b992956ab23b07209b1d0260a2f834470e5c23e",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 72000,
        "output_samples": 72000,
        "length_delta_samples": 0,
        "sample_rate": 48000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 240,
            "hop_samples": 60,
            "log_magnitude_mae_db": 4.931689928689678,
            "spectral_convergence": 0.635755142201903,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 6.552902439330402e-07
          },
          {
            "window_ms": 20,
            "window_samples": 960,
            "hop_samples": 240,
            "log_magnitude_mae_db": 5.0844389599547455,
            "spectral_convergence": 0.6469122239864254,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 3.42738569490461e-07
          },
          {
            "window_ms": 80,
            "window_samples": 3840,
            "hop_samples": 960,
            "log_magnitude_mae_db": 5.248794011430989,
            "spectral_convergence": 0.6581041757603057,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.5353408899322663e-07
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 8.871501047754418e-07,
              "output_power": 3.770333861488687e-05,
              "delta_db": 16.283827003286703,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.0002722044085115042,
              "output_power": 0.00030481102063345934,
              "delta_db": 0.4913551056012082,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.0006828458443453354,
              "output_power": 0.0006793769274373866,
              "delta_db": -0.02211877174574848,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.0013396582156900432,
              "output_power": 0.0013877227671350604,
              "delta_db": 0.15308701614432824,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.0027292042373384708,
              "output_power": 0.0026943250065808453,
              "delta_db": -0.05586054986813653,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 0.002855527574868151,
              "output_power": 0.0031227763776219344,
              "delta_db": 0.3885452710893479,
              "reference_active": true
            },
            {
              "low_hz": 8000.0,
              "high_hz": 16000.0,
              "reference_power": 6.61838156225461e-05,
              "output_power": 6.65748872861309e-05,
              "delta_db": 0.02558638387676834,
              "reference_active": true
            },
            {
              "low_hz": 16000.0,
              "high_hz": 24000.0,
              "reference_power": 7.9884632100967e-09,
              "output_power": 8.231862477714902e-09,
              "delta_db": 0.1303486700657059,
              "reference_active": true
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 8,
          "band_count": 8,
          "active_band_mae_db": 2.1938410964597432,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.18550361222151418,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 3840
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 143,
          "expected_voiced_frames": 0,
          "expected_unvoiced_frames": 143,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 0,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": null,
          "abs_error_cents_p95": null,
          "voiced_detection_rate": null,
          "unvoiced_false_positive_rate": 0.0,
          "score_status": "no_valid_voiced_frames",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -20.812726998174274,
        "output_peak": 0.5720091801847492,
        "reference_rms_dbfs": -20.99823061039579,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 5.088307633358471
      }
    },
    {
      "case": "am_noise_6hz_48000",
      "kind": "known_unvoiced",
      "method": "llsm_world_dio",
      "base_method": "world_harvest",
      "decoder_family": "LLSM layer0",
      "f0_source": "WORLD DIO+StoneMask",
      "native_metadata": {
        "method": "llsm-layer0-czt-external-f0",
        "sample_rate": 48000,
        "input_samples": 72000,
        "output_samples": 72000,
        "native_output_samples": 72480,
        "trimmed_tail_samples": 480,
        "fixed_delay_samples": 0,
        "hop_seconds": 0.005,
        "seed": 0,
        "f0_refine": false,
        "native_rng_seed": 1,
        "rng": "libc srand/rand; same pinned runtime only",
        "normalization": "none",
        "residual_waveform_bypass": false,
        "noise_band_edges_hz": [
          2000,
          4000,
          8000
        ]
      },
      "status": "measured",
      "seconds": 0.07972709899695474,
      "rtf": 0.05315139933130316,
      "output_sha256": "386f9182e6b98b0d5fb3f173ff661ddf7248e65aa9a663572e706e3e27f537d2",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 72000,
        "output_samples": 72000,
        "length_delta_samples": 0,
        "sample_rate": 48000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 240,
            "hop_samples": 60,
            "log_magnitude_mae_db": 6.653541197899485,
            "spectral_convergence": 0.5363507950424833,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 6.552902439330402e-07
          },
          {
            "window_ms": 20,
            "window_samples": 960,
            "hop_samples": 240,
            "log_magnitude_mae_db": 6.949926167349226,
            "spectral_convergence": 0.5027757987138644,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 3.42738569490461e-07
          },
          {
            "window_ms": 80,
            "window_samples": 3840,
            "hop_samples": 960,
            "log_magnitude_mae_db": 7.858947376125579,
            "spectral_convergence": 0.5944200951781204,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.5353408899322663e-07
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 8.871501047754418e-07,
              "output_power": 1.9816186009470992e-06,
              "delta_db": 3.490229620333021,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.0002722044085115042,
              "output_power": 0.00023858731688244895,
              "delta_db": -0.5724780139185056,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.0006828458443453354,
              "output_power": 0.0006953252269940353,
              "delta_db": 0.07865315517832504,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.0013396582156900432,
              "output_power": 0.0013076284204392241,
              "delta_db": -0.10509660703309973,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.0027292042373384708,
              "output_power": 0.002503965042979526,
              "delta_db": -0.37407775349819344,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 0.002855527574868151,
              "output_power": 0.002618344440933237,
              "delta_db": -0.37659581322502583,
              "reference_active": true
            },
            {
              "low_hz": 8000.0,
              "high_hz": 16000.0,
              "reference_power": 6.61838156225461e-05,
              "output_power": 6.276865691968674e-05,
              "delta_db": -0.23008965429363498,
              "reference_active": true
            },
            {
              "low_hz": 16000.0,
              "high_hz": 24000.0,
              "reference_power": 7.9884632100967e-09,
              "output_power": 1.1506229861116887e-08,
              "delta_db": 1.5846980627781386,
              "reference_active": true
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 8,
          "band_count": 8,
          "active_band_mae_db": 0.851489835032243,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": -0.2926924998521748,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 3840
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 143,
          "expected_voiced_frames": 0,
          "expected_unvoiced_frames": 143,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 0,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": null,
          "abs_error_cents_p95": null,
          "voiced_detection_rate": null,
          "unvoiced_false_positive_rate": 0.0,
          "score_status": "no_valid_voiced_frames",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -21.29092311024796,
        "output_peak": 0.6317715661479453,
        "reference_rms_dbfs": -20.99823061039579,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 7.154138247124763
      }
    },
    {
      "case": "voiced_unvoiced_boundaries_48000",
      "kind": "known_mixed",
      "method": "identity",
      "base_method": "world_harvest",
      "decoder_family": "none",
      "f0_source": null,
      "role": "measurement_sanity_only_not_a_vocoder",
      "status": "measured",
      "seconds": 7.497100159525871e-05,
      "rtf": 4.6856875997036695e-05,
      "output_sha256": "83e3448925e14fe0888376f30952cee6148564ea22cfb26b4f5ec795340c83f5",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 76800,
        "output_samples": 76800,
        "length_delta_samples": 0,
        "sample_rate": 48000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 240,
            "hop_samples": 60,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.9324218569546794e-06
          },
          {
            "window_ms": 20,
            "window_samples": 960,
            "hop_samples": 240,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.3619863838507488e-06
          },
          {
            "window_ms": 80,
            "window_samples": 3840,
            "hop_samples": 960,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.3580102448380447e-06
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.03047380309215163,
              "output_power": 0.03047380309215163,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.005157709327867115,
              "output_power": 0.005157709327867115,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.00353875006812259,
              "output_power": 0.00353875006812259,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.002029762060050069,
              "output_power": 0.002029762060050069,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.002606577366861781,
              "output_power": 0.002606577366861781,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 0.0024034467397108395,
              "output_power": 0.0024034467397108395,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 8000.0,
              "high_hz": 16000.0,
              "reference_power": 0.00013061289319707598,
              "output_power": 0.00013061289319707598,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 16000.0,
              "high_hz": 24000.0,
              "reference_power": 1.5360693858317516e-07,
              "output_power": 1.5360693858317516e-07,
              "delta_db": 0.0,
              "reference_active": true
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 8,
          "band_count": 8,
          "active_band_mae_db": 0.0,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.0,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 3840
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 153,
          "expected_voiced_frames": 96,
          "expected_unvoiced_frames": 43,
          "boundary_frames": 14,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 96,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": 0.008094127872799416,
          "abs_error_cents_p95": 0.008103680851882001,
          "voiced_detection_rate": 1.0,
          "unvoiced_false_positive_rate": 0.0,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -13.340363310518448,
        "output_peak": 0.6,
        "reference_rms_dbfs": -13.340363310518448,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 0.0
      }
    },
    {
      "case": "voiced_unvoiced_boundaries_48000",
      "kind": "known_mixed",
      "method": "world_dio",
      "base_method": "world_harvest",
      "decoder_family": "WORLD",
      "f0_source": "WORLD DIO+StoneMask",
      "native_length_policy": "C API synthesizes requested n_samples directly; no crop/pad",
      "feature_scalars": 658371,
      "feature_f0_voiced_fraction": 0.6915887850467289,
      "status": "measured",
      "seconds": 0.31514131299991277,
      "rtf": 0.19696332062494548,
      "output_sha256": "11d83a7609b5ad9617a630682093f8d750b1c41443dce7a492b006c308a40400",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 76800,
        "output_samples": 76800,
        "length_delta_samples": 0,
        "sample_rate": 48000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 240,
            "hop_samples": 60,
            "log_magnitude_mae_db": 3.69618770488959,
            "spectral_convergence": 0.6045283714062166,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.9324218569546794e-06
          },
          {
            "window_ms": 20,
            "window_samples": 960,
            "hop_samples": 240,
            "log_magnitude_mae_db": 2.6163192663764243,
            "spectral_convergence": 0.26077235768351137,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.3619863838507488e-06
          },
          {
            "window_ms": 80,
            "window_samples": 3840,
            "hop_samples": 960,
            "log_magnitude_mae_db": 3.600571358246817,
            "spectral_convergence": 0.26282940672542277,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.3580102448380447e-06
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.03047380309215163,
              "output_power": 0.03577542667155428,
              "delta_db": 0.6965816501841582,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.005157709327867115,
              "output_power": 0.005173584613130209,
              "delta_db": 0.013346932638379588,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.00353875006812259,
              "output_power": 0.0033527077815756782,
              "delta_db": -0.23454188297747688,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.002029762060050069,
              "output_power": 0.001948368874407534,
              "delta_db": -0.1777394748088838,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.002606577366861781,
              "output_power": 0.0027444645268621505,
              "delta_db": 0.22387001827990113,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 0.0024034467397108395,
              "output_power": 0.002579354660833384,
              "delta_db": 0.3067655904023947,
              "reference_active": true
            },
            {
              "low_hz": 8000.0,
              "high_hz": 16000.0,
              "reference_power": 0.00013061289319707598,
              "output_power": 0.00013351381169239573,
              "delta_db": 0.09540145187584251,
              "reference_active": true
            },
            {
              "low_hz": 16000.0,
              "high_hz": 24000.0,
              "reference_power": 1.5360693858317516e-07,
              "output_power": 1.5327690903222472e-07,
              "delta_db": -0.009340997853865175,
              "reference_active": true
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 8,
          "band_count": 8,
          "active_band_mae_db": 0.21969849987761275,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.4759049502971764,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 3840
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 153,
          "expected_voiced_frames": 96,
          "expected_unvoiced_frames": 43,
          "boundary_frames": 14,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 96,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": 0.0472085267849135,
          "abs_error_cents_p95": 0.2992150172198821,
          "voiced_detection_rate": 1.0,
          "unvoiced_false_positive_rate": 0.0,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -12.864458360221274,
        "output_peak": 0.6592634461137796,
        "reference_rms_dbfs": -13.340363310518448,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 3.3043594431709438
      }
    },
    {
      "case": "voiced_unvoiced_boundaries_48000",
      "kind": "known_mixed",
      "method": "world_harvest",
      "base_method": "world_harvest",
      "decoder_family": "WORLD",
      "f0_source": "WORLD Harvest",
      "native_length_policy": "C API synthesizes requested n_samples directly; no crop/pad",
      "feature_scalars": 658371,
      "feature_f0_voiced_fraction": 0.6978193146417445,
      "status": "measured",
      "seconds": 0.4793619480005873,
      "rtf": 0.29960121750036706,
      "output_sha256": "264056a5e4384b1539abbf4281ffdbf1556ce6cd5f13127309dd4c7cc70d0080",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 76800,
        "output_samples": 76800,
        "length_delta_samples": 0,
        "sample_rate": 48000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 240,
            "hop_samples": 60,
            "log_magnitude_mae_db": 3.1452842175029674,
            "spectral_convergence": 0.4213515988962841,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.9324218569546794e-06
          },
          {
            "window_ms": 20,
            "window_samples": 960,
            "hop_samples": 240,
            "log_magnitude_mae_db": 2.6084781194266458,
            "spectral_convergence": 0.26037372399127706,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.3619863838507488e-06
          },
          {
            "window_ms": 80,
            "window_samples": 3840,
            "hop_samples": 960,
            "log_magnitude_mae_db": 3.612292085687843,
            "spectral_convergence": 0.2665125101244623,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.3580102448380447e-06
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.03047380309215163,
              "output_power": 0.035903093382495595,
              "delta_db": 0.7120521165589095,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.005157709327867115,
              "output_power": 0.0051995603678778165,
              "delta_db": 0.035097617799066824,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.00353875006812259,
              "output_power": 0.003345484238664263,
              "delta_db": -0.2439090257315889,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.002029762060050069,
              "output_power": 0.001948758669169351,
              "delta_db": -0.1768707030645486,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.002606577366861781,
              "output_power": 0.002818977259190045,
              "delta_db": 0.34020952491630424,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 0.0024034467397108395,
              "output_power": 0.0025489567845519423,
              "delta_db": 0.25527969807020146,
              "reference_active": true
            },
            {
              "low_hz": 8000.0,
              "high_hz": 16000.0,
              "reference_power": 0.00013061289319707598,
              "output_power": 0.00013145285373667253,
              "delta_db": 0.027839691436393723,
              "reference_active": true
            },
            {
              "low_hz": 16000.0,
              "high_hz": 24000.0,
              "reference_power": 1.5360693858317516e-07,
              "output_power": 1.5834815222274503e-07,
              "delta_db": 0.13202166254088482,
              "reference_active": true
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 8,
          "band_count": 8,
          "active_band_mae_db": 0.24041000501473725,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.4917391405443077,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 3840
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 153,
          "expected_voiced_frames": 96,
          "expected_unvoiced_frames": 43,
          "boundary_frames": 14,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 96,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": 0.051599349917577225,
          "abs_error_cents_p95": 0.4182206588387863,
          "voiced_detection_rate": 1.0,
          "unvoiced_false_positive_rate": 0.0,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -12.84862416997414,
        "output_peak": 0.7887716265246233,
        "reference_rms_dbfs": -13.340363310518448,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 3.1220181408724854
      }
    },
    {
      "case": "voiced_unvoiced_boundaries_48000",
      "kind": "known_mixed",
      "method": "llsm_world_dio",
      "base_method": "world_harvest",
      "decoder_family": "LLSM layer0",
      "f0_source": "WORLD DIO+StoneMask",
      "native_metadata": {
        "method": "llsm-layer0-czt-external-f0",
        "sample_rate": 48000,
        "input_samples": 76800,
        "output_samples": 76800,
        "native_output_samples": 77280,
        "trimmed_tail_samples": 480,
        "fixed_delay_samples": 0,
        "hop_seconds": 0.005,
        "seed": 0,
        "f0_refine": false,
        "native_rng_seed": 1,
        "rng": "libc srand/rand; same pinned runtime only",
        "normalization": "none",
        "residual_waveform_bypass": false,
        "noise_band_edges_hz": [
          2000,
          4000,
          8000
        ]
      },
      "status": "measured",
      "seconds": 0.26527715799966245,
      "rtf": 0.16579822374978903,
      "output_sha256": "5c3c86be33ab372d91b48b99b7462063a306d026ec166cbb1ae2074f7def60ea",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 76800,
        "output_samples": 76800,
        "length_delta_samples": 0,
        "sample_rate": 48000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 240,
            "hop_samples": 60,
            "log_magnitude_mae_db": 2.5202190008104037,
            "spectral_convergence": 0.19646810658238265,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.9324218569546794e-06
          },
          {
            "window_ms": 20,
            "window_samples": 960,
            "hop_samples": 240,
            "log_magnitude_mae_db": 2.2961894308542177,
            "spectral_convergence": 0.1931974105115411,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.3619863838507488e-06
          },
          {
            "window_ms": 80,
            "window_samples": 3840,
            "hop_samples": 960,
            "log_magnitude_mae_db": 2.4407837968736925,
            "spectral_convergence": 0.22790902608390276,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.3580102448380447e-06
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.03047380309215163,
              "output_power": 0.030161930019961997,
              "delta_db": -0.04467529021086638,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.005157709327867115,
              "output_power": 0.005036034184339742,
              "delta_db": -0.10368193618214248,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.00353875006812259,
              "output_power": 0.0034687155126380946,
              "delta_db": -0.08681208175371188,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.002029762060050069,
              "output_power": 0.0019264104956832858,
              "delta_db": -0.2269629473706371,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.002606577366861781,
              "output_power": 0.002430673733711664,
              "delta_db": -0.3034395197046467,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 0.0024034467397108395,
              "output_power": 0.002224484070813464,
              "delta_db": -0.3360520244239478,
              "reference_active": true
            },
            {
              "low_hz": 8000.0,
              "high_hz": 16000.0,
              "reference_power": 0.00013061289319707598,
              "output_power": 0.00012433405370596487,
              "delta_db": -0.21395956255494752,
              "reference_active": true
            },
            {
              "low_hz": 16000.0,
              "high_hz": 24000.0,
              "reference_power": 1.5360693858317516e-07,
              "output_power": 1.42983084199051e-07,
              "delta_db": -0.3112617293945991,
              "reference_active": true
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 8,
          "band_count": 8,
          "active_band_mae_db": 0.20335563644943738,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": -0.0916880547785649,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 3840
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 153,
          "expected_voiced_frames": 96,
          "expected_unvoiced_frames": 43,
          "boundary_frames": 14,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 96,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": 0.012781624398779763,
          "abs_error_cents_p95": 0.135888259910679,
          "voiced_detection_rate": 1.0,
          "unvoiced_false_positive_rate": 0.0,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -13.432051365297013,
        "output_peak": 0.6742442879554418,
        "reference_rms_dbfs": -13.340363310518448,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 2.419064076179438
      }
    },
    {
      "case": "silence_48000",
      "kind": "silence",
      "method": "identity",
      "base_method": "world_harvest",
      "decoder_family": "none",
      "f0_source": null,
      "role": "measurement_sanity_only_not_a_vocoder",
      "status": "measured",
      "seconds": 2.566799958003685e-05,
      "rtf": 3.208499947504606e-05,
      "output_sha256": "7818f5542a0404157573be6cffc0e0c8e68ce3c0f5d17d07ccdd9313fb700baf",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 38400,
        "output_samples": 38400,
        "length_delta_samples": 0,
        "sample_rate": 48000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 240,
            "hop_samples": 60,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": null,
            "spectral_convergence_status": "zero_reference_energy",
            "amplitude_floor": 1e-10
          },
          {
            "window_ms": 20,
            "window_samples": 960,
            "hop_samples": 240,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": null,
            "spectral_convergence_status": "zero_reference_energy",
            "amplitude_floor": 1e-10
          },
          {
            "window_ms": 80,
            "window_samples": 3840,
            "hop_samples": 960,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": null,
            "spectral_convergence_status": "zero_reference_energy",
            "amplitude_floor": 1e-10
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.0,
              "output_power": 0.0,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.0,
              "output_power": 0.0,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.0,
              "output_power": 0.0,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.0,
              "output_power": 0.0,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.0,
              "output_power": 0.0,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 0.0,
              "output_power": 0.0,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 8000.0,
              "high_hz": 16000.0,
              "reference_power": 0.0,
              "output_power": 0.0,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 16000.0,
              "high_hz": 24000.0,
              "reference_power": 0.0,
              "output_power": 0.0,
              "delta_db": 0.0,
              "reference_active": false
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 0,
          "band_count": 8,
          "active_band_mae_db": null,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "no_active_reference_bands"
        },
        "rms_gain_error_db": null,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 3840
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 73,
          "expected_voiced_frames": 0,
          "expected_unvoiced_frames": 73,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 0,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": null,
          "abs_error_cents_p95": null,
          "voiced_detection_rate": null,
          "unvoiced_false_positive_rate": 0.0,
          "score_status": "no_valid_voiced_frames",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -120.0,
        "output_peak": 0.0,
        "reference_rms_dbfs": -120.0,
        "rms_gain_status": "zero_reference_energy",
        "mr_stft_log_magnitude_mae_db": 0.0
      }
    },
    {
      "case": "silence_48000",
      "kind": "silence",
      "method": "world_dio",
      "base_method": "world_harvest",
      "decoder_family": "WORLD",
      "f0_source": "WORLD DIO+StoneMask",
      "native_length_policy": "C API synthesizes requested n_samples directly; no crop/pad",
      "feature_scalars": 330211,
      "feature_f0_voiced_fraction": 0.0,
      "status": "measured",
      "seconds": 0.0729617489996599,
      "rtf": 0.09120218624957488,
      "output_sha256": "53bb3a3f227e30fa19607c2cefa55b60c82e72d087aee082ad1f41c4d5f9211a",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 38400,
        "output_samples": 38400,
        "length_delta_samples": 0,
        "sample_rate": 48000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 240,
            "hop_samples": 60,
            "log_magnitude_mae_db": 16.18221415884287,
            "spectral_convergence": null,
            "spectral_convergence_status": "zero_reference_energy",
            "amplitude_floor": 1e-10
          },
          {
            "window_ms": 20,
            "window_samples": 960,
            "hop_samples": 240,
            "log_magnitude_mae_db": 10.39418678281654,
            "spectral_convergence": null,
            "spectral_convergence_status": "zero_reference_energy",
            "amplitude_floor": 1e-10
          },
          {
            "window_ms": 80,
            "window_samples": 3840,
            "hop_samples": 960,
            "log_magnitude_mae_db": 5.031456766023684,
            "spectral_convergence": null,
            "spectral_convergence_status": "zero_reference_energy",
            "amplitude_floor": 1e-10
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.0,
              "output_power": 1.4533022990216594e-19,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.0,
              "output_power": 1.2303291669786493e-18,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.0,
              "output_power": 2.6249291792802805e-18,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.0,
              "output_power": 5.052997234642636e-18,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.0,
              "output_power": 1.0590488267612128e-17,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 0.0,
              "output_power": 2.047420037252873e-17,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 8000.0,
              "high_hz": 16000.0,
              "reference_power": 0.0,
              "output_power": 4.1665085770680156e-17,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 16000.0,
              "high_hz": 24000.0,
              "reference_power": 0.0,
              "output_power": 4.154546832411289e-17,
              "delta_db": 0.0,
              "reference_active": false
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 0,
          "band_count": 8,
          "active_band_mae_db": null,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "no_active_reference_bands"
        },
        "rms_gain_error_db": null,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 3840
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 73,
          "expected_voiced_frames": 0,
          "expected_unvoiced_frames": 73,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 0,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": null,
          "abs_error_cents_p95": null,
          "voiced_detection_rate": null,
          "unvoiced_false_positive_rate": 0.0,
          "score_status": "no_valid_voiced_frames",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -120.0,
        "output_peak": 5.09399763345887e-08,
        "reference_rms_dbfs": -120.0,
        "rms_gain_status": "zero_reference_energy",
        "mr_stft_log_magnitude_mae_db": 10.535952569227698
      }
    },
    {
      "case": "silence_48000",
      "kind": "silence",
      "method": "world_harvest",
      "base_method": "world_harvest",
      "decoder_family": "WORLD",
      "f0_source": "WORLD Harvest",
      "native_length_policy": "C API synthesizes requested n_samples directly; no crop/pad",
      "feature_scalars": 330211,
      "feature_f0_voiced_fraction": 0.0,
      "status": "measured",
      "seconds": 0.07600569399801316,
      "rtf": 0.09500711749751645,
      "output_sha256": "53bb3a3f227e30fa19607c2cefa55b60c82e72d087aee082ad1f41c4d5f9211a",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 38400,
        "output_samples": 38400,
        "length_delta_samples": 0,
        "sample_rate": 48000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 240,
            "hop_samples": 60,
            "log_magnitude_mae_db": 16.18221415884287,
            "spectral_convergence": null,
            "spectral_convergence_status": "zero_reference_energy",
            "amplitude_floor": 1e-10
          },
          {
            "window_ms": 20,
            "window_samples": 960,
            "hop_samples": 240,
            "log_magnitude_mae_db": 10.39418678281654,
            "spectral_convergence": null,
            "spectral_convergence_status": "zero_reference_energy",
            "amplitude_floor": 1e-10
          },
          {
            "window_ms": 80,
            "window_samples": 3840,
            "hop_samples": 960,
            "log_magnitude_mae_db": 5.031456766023684,
            "spectral_convergence": null,
            "spectral_convergence_status": "zero_reference_energy",
            "amplitude_floor": 1e-10
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.0,
              "output_power": 1.4533022990216594e-19,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.0,
              "output_power": 1.2303291669786493e-18,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.0,
              "output_power": 2.6249291792802805e-18,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.0,
              "output_power": 5.052997234642636e-18,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.0,
              "output_power": 1.0590488267612128e-17,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 0.0,
              "output_power": 2.047420037252873e-17,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 8000.0,
              "high_hz": 16000.0,
              "reference_power": 0.0,
              "output_power": 4.1665085770680156e-17,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 16000.0,
              "high_hz": 24000.0,
              "reference_power": 0.0,
              "output_power": 4.154546832411289e-17,
              "delta_db": 0.0,
              "reference_active": false
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 0,
          "band_count": 8,
          "active_band_mae_db": null,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "no_active_reference_bands"
        },
        "rms_gain_error_db": null,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 3840
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 73,
          "expected_voiced_frames": 0,
          "expected_unvoiced_frames": 73,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 0,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": null,
          "abs_error_cents_p95": null,
          "voiced_detection_rate": null,
          "unvoiced_false_positive_rate": 0.0,
          "score_status": "no_valid_voiced_frames",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -120.0,
        "output_peak": 5.09399763345887e-08,
        "reference_rms_dbfs": -120.0,
        "rms_gain_status": "zero_reference_energy",
        "mr_stft_log_magnitude_mae_db": 10.535952569227698
      }
    },
    {
      "case": "silence_48000",
      "kind": "silence",
      "method": "llsm_world_dio",
      "base_method": "world_harvest",
      "decoder_family": "LLSM layer0",
      "f0_source": "WORLD DIO+StoneMask",
      "native_metadata": {
        "method": "llsm-layer0-czt-external-f0",
        "sample_rate": 48000,
        "input_samples": 38400,
        "output_samples": 38400,
        "native_output_samples": 38880,
        "trimmed_tail_samples": 480,
        "fixed_delay_samples": 0,
        "hop_seconds": 0.005,
        "seed": 0,
        "f0_refine": false,
        "native_rng_seed": 1,
        "rng": "libc srand/rand; same pinned runtime only",
        "normalization": "none",
        "residual_waveform_bypass": false,
        "noise_band_edges_hz": [
          2000,
          4000,
          8000
        ]
      },
      "status": "measured",
      "seconds": 0.035782417999143945,
      "rtf": 0.04472802249892993,
      "output_sha256": "a0fc054562133fd299459cd575a879bdff6bc1cc86c372fca8780b5174644118",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 38400,
        "output_samples": 38400,
        "length_delta_samples": 0,
        "sample_rate": 48000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 240,
            "hop_samples": 60,
            "log_magnitude_mae_db": 72.64063509618391,
            "spectral_convergence": null,
            "spectral_convergence_status": "zero_reference_energy",
            "amplitude_floor": 1e-10
          },
          {
            "window_ms": 20,
            "window_samples": 960,
            "hop_samples": 240,
            "log_magnitude_mae_db": 66.57915348744828,
            "spectral_convergence": null,
            "spectral_convergence_status": "zero_reference_energy",
            "amplitude_floor": 1e-10
          },
          {
            "window_ms": 80,
            "window_samples": 3840,
            "hop_samples": 960,
            "log_magnitude_mae_db": 60.207593748654155,
            "spectral_convergence": null,
            "spectral_convergence_status": "zero_reference_energy",
            "amplitude_floor": 1e-10
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.0,
              "output_power": 3.7420605227170183e-13,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.0,
              "output_power": 5.425654314113577e-13,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.0,
              "output_power": 1.1059357133303778e-12,
              "delta_db": 0.43729882703471856,
              "reference_active": false
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.0,
              "output_power": 2.285990682590706e-12,
              "delta_db": 3.5907445593341496,
              "reference_active": false
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.0,
              "output_power": 4.1211172511357074e-12,
              "delta_db": 6.150149709421656,
              "reference_active": false
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 0.0,
              "output_power": 7.955530644628164e-12,
              "delta_db": 9.006691529766705,
              "reference_active": false
            },
            {
              "low_hz": 8000.0,
              "high_hz": 16000.0,
              "reference_power": 0.0,
              "output_power": 1.6661097005812586e-11,
              "delta_db": 12.217035929823085,
              "reference_active": false
            },
            {
              "low_hz": 16000.0,
              "high_hz": 24000.0,
              "reference_power": 0.0,
              "output_power": 1.5701505830123738e-11,
              "delta_db": 11.959413047884198,
              "reference_active": false
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 0,
          "band_count": 8,
          "active_band_mae_db": null,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "no_active_reference_bands"
        },
        "rms_gain_error_db": null,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 3840
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 73,
          "expected_voiced_frames": 0,
          "expected_unvoiced_frames": 73,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 0,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": null,
          "abs_error_cents_p95": null,
          "voiced_detection_rate": null,
          "unvoiced_false_positive_rate": 0.0,
          "score_status": "no_valid_voiced_frames",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -103.12043655361052,
        "output_peak": 3.283250791112308e-05,
        "reference_rms_dbfs": -120.0,
        "rms_gain_status": "zero_reference_energy",
        "mr_stft_log_magnitude_mae_db": 66.47579411076211
      }
    },
    {
      "case": "impulse_48000",
      "kind": "transient_diagnostic",
      "method": "identity",
      "base_method": "world_harvest",
      "decoder_family": "none",
      "f0_source": null,
      "role": "measurement_sanity_only_not_a_vocoder",
      "status": "measured",
      "seconds": 2.4545999622205272e-05,
      "rtf": 3.068249952775659e-05,
      "output_sha256": "e69a73cff2e66d667e626c78971f8cd1ab3e15a442a34374859af03ff8200d68",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 38400,
        "output_samples": 38400,
        "length_delta_samples": 0,
        "sample_rate": 48000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 240,
            "hop_samples": 60,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 4.1666666666666676e-08
          },
          {
            "window_ms": 20,
            "window_samples": 960,
            "hop_samples": 240,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.0416666666666669e-08
          },
          {
            "window_ms": 80,
            "window_samples": 3840,
            "hop_samples": 960,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 2.6041666666666672e-09
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 5.408393012152778e-08,
              "output_power": 5.408393012152778e-08,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 8.138020833333332e-08,
              "output_power": 8.138020833333332e-08,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 1.3563368055555558e-07,
              "output_power": 1.3563368055555558e-07,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 2.7126736111111116e-07,
              "output_power": 2.7126736111111116e-07,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 5.425347222222223e-07,
              "output_power": 5.425347222222223e-07,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 1.0850694444444447e-06,
              "output_power": 1.0850694444444447e-06,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 8000.0,
              "high_hz": 16000.0,
              "reference_power": 2.1701388888888893e-06,
              "output_power": 2.1701388888888893e-06,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 16000.0,
              "high_hz": 24000.0,
              "reference_power": 2.170308430989584e-06,
              "output_power": 2.170308430989584e-06,
              "delta_db": 0.0,
              "reference_active": true
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 8,
          "band_count": 8,
          "active_band_mae_db": 0.0,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.0,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 3840
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 73,
          "expected_voiced_frames": 0,
          "expected_unvoiced_frames": 73,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 0,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": null,
          "abs_error_cents_p95": null,
          "voiced_detection_rate": null,
          "unvoiced_false_positive_rate": 0.0,
          "score_status": "no_valid_voiced_frames",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -51.86391215695493,
        "output_peak": 0.5,
        "reference_rms_dbfs": -51.86391215695493,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 0.0
      },
      "event": {
        "status": "peak_energy_diagnostic",
        "expected_s": 0.3,
        "detected_s": 0.29752083333333335,
        "error_ms": -2.4791666666666434
      }
    },
    {
      "case": "impulse_48000",
      "kind": "transient_diagnostic",
      "method": "world_dio",
      "base_method": "world_harvest",
      "decoder_family": "WORLD",
      "f0_source": "WORLD DIO+StoneMask",
      "native_length_policy": "C API synthesizes requested n_samples directly; no crop/pad",
      "feature_scalars": 330211,
      "feature_f0_voiced_fraction": 0.0,
      "status": "measured",
      "seconds": 0.06120687299699057,
      "rtf": 0.07650859124623821,
      "output_sha256": "b5ba774119233b0ab58bdb6e2c065f1d07df6fefb4598a2171a7e2bd77e71ac4",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 38400,
        "output_samples": 38400,
        "length_delta_samples": 0,
        "sample_rate": 48000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 240,
            "hop_samples": 60,
            "log_magnitude_mae_db": 1.167837806136438,
            "spectral_convergence": 1.1604892827335278,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 4.1666666666666676e-08
          },
          {
            "window_ms": 20,
            "window_samples": 960,
            "hop_samples": 240,
            "log_magnitude_mae_db": 1.3831803826749927,
            "spectral_convergence": 0.7949733361565668,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.0416666666666669e-08
          },
          {
            "window_ms": 80,
            "window_samples": 3840,
            "hop_samples": 960,
            "log_magnitude_mae_db": 3.1418372316792995,
            "spectral_convergence": 0.7507679747945784,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 2.6041666666666672e-09
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 5.408393012152778e-08,
              "output_power": 9.107612021720994e-08,
              "delta_db": 2.2633627868384627,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 8.138020833333332e-08,
              "output_power": 7.18885083111088e-07,
              "delta_db": 9.461406747678078,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 1.3563368055555558e-07,
              "output_power": 2.7651429658610466e-07,
              "delta_db": 3.093500435687333,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 2.7126736111111116e-07,
              "output_power": 6.407154556344457e-07,
              "delta_db": 3.732676577776001,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 5.425347222222223e-07,
              "output_power": 8.532289879685569e-07,
              "delta_db": 1.9663806367865024,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 1.0850694444444447e-06,
              "output_power": 2.9081882269632592e-06,
              "delta_db": 4.281649780618752,
              "reference_active": true
            },
            {
              "low_hz": 8000.0,
              "high_hz": 16000.0,
              "reference_power": 2.1701388888888893e-06,
              "output_power": 4.892036442514971e-06,
              "delta_db": 3.530021540051207,
              "reference_active": true
            },
            {
              "low_hz": 16000.0,
              "high_hz": 24000.0,
              "reference_power": 2.170308430989584e-06,
              "output_power": 4.362679386809717e-06,
              "delta_db": 3.0323184035383273,
              "reference_active": true
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 8,
          "band_count": 8,
          "active_band_mae_db": 3.9201646136218327,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 3.5498662540754284,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 3840
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 73,
          "expected_voiced_frames": 0,
          "expected_unvoiced_frames": 73,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 0,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": null,
          "abs_error_cents_p95": null,
          "voiced_detection_rate": null,
          "unvoiced_false_positive_rate": 0.0,
          "score_status": "no_valid_voiced_frames",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -48.3140459028795,
        "output_peak": 0.12454448795206725,
        "reference_rms_dbfs": -51.86391215695493,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 1.89761847349691
      },
      "event": {
        "status": "peak_energy_diagnostic",
        "expected_s": 0.3,
        "detected_s": 0.30054166666666665,
        "error_ms": 0.5416666666666625
      }
    },
    {
      "case": "impulse_48000",
      "kind": "transient_diagnostic",
      "method": "world_harvest",
      "base_method": "world_harvest",
      "decoder_family": "WORLD",
      "f0_source": "WORLD Harvest",
      "native_length_policy": "C API synthesizes requested n_samples directly; no crop/pad",
      "feature_scalars": 330211,
      "feature_f0_voiced_fraction": 0.0,
      "status": "measured",
      "seconds": 0.09389310500046122,
      "rtf": 0.11736638125057652,
      "output_sha256": "b5ba774119233b0ab58bdb6e2c065f1d07df6fefb4598a2171a7e2bd77e71ac4",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 38400,
        "output_samples": 38400,
        "length_delta_samples": 0,
        "sample_rate": 48000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 240,
            "hop_samples": 60,
            "log_magnitude_mae_db": 1.167837806136438,
            "spectral_convergence": 1.1604892827335278,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 4.1666666666666676e-08
          },
          {
            "window_ms": 20,
            "window_samples": 960,
            "hop_samples": 240,
            "log_magnitude_mae_db": 1.3831803826749927,
            "spectral_convergence": 0.7949733361565668,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.0416666666666669e-08
          },
          {
            "window_ms": 80,
            "window_samples": 3840,
            "hop_samples": 960,
            "log_magnitude_mae_db": 3.1418372316792995,
            "spectral_convergence": 0.7507679747945784,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 2.6041666666666672e-09
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 5.408393012152778e-08,
              "output_power": 9.107612021720994e-08,
              "delta_db": 2.2633627868384627,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 8.138020833333332e-08,
              "output_power": 7.18885083111088e-07,
              "delta_db": 9.461406747678078,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 1.3563368055555558e-07,
              "output_power": 2.7651429658610466e-07,
              "delta_db": 3.093500435687333,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 2.7126736111111116e-07,
              "output_power": 6.407154556344457e-07,
              "delta_db": 3.732676577776001,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 5.425347222222223e-07,
              "output_power": 8.532289879685569e-07,
              "delta_db": 1.9663806367865024,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 1.0850694444444447e-06,
              "output_power": 2.9081882269632592e-06,
              "delta_db": 4.281649780618752,
              "reference_active": true
            },
            {
              "low_hz": 8000.0,
              "high_hz": 16000.0,
              "reference_power": 2.1701388888888893e-06,
              "output_power": 4.892036442514971e-06,
              "delta_db": 3.530021540051207,
              "reference_active": true
            },
            {
              "low_hz": 16000.0,
              "high_hz": 24000.0,
              "reference_power": 2.170308430989584e-06,
              "output_power": 4.362679386809717e-06,
              "delta_db": 3.0323184035383273,
              "reference_active": true
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 8,
          "band_count": 8,
          "active_band_mae_db": 3.9201646136218327,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 3.5498662540754284,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 3840
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 73,
          "expected_voiced_frames": 0,
          "expected_unvoiced_frames": 73,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 0,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": null,
          "abs_error_cents_p95": null,
          "voiced_detection_rate": null,
          "unvoiced_false_positive_rate": 0.0,
          "score_status": "no_valid_voiced_frames",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -48.3140459028795,
        "output_peak": 0.12454448795206725,
        "reference_rms_dbfs": -51.86391215695493,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 1.89761847349691
      },
      "event": {
        "status": "peak_energy_diagnostic",
        "expected_s": 0.3,
        "detected_s": 0.30054166666666665,
        "error_ms": 0.5416666666666625
      }
    },
    {
      "case": "impulse_48000",
      "kind": "transient_diagnostic",
      "method": "llsm_world_dio",
      "base_method": "world_harvest",
      "decoder_family": "LLSM layer0",
      "f0_source": "WORLD DIO+StoneMask",
      "native_metadata": {
        "method": "llsm-layer0-czt-external-f0",
        "sample_rate": 48000,
        "input_samples": 38400,
        "output_samples": 38400,
        "native_output_samples": 38880,
        "trimmed_tail_samples": 480,
        "fixed_delay_samples": 0,
        "hop_seconds": 0.005,
        "seed": 0,
        "f0_refine": false,
        "native_rng_seed": 1,
        "rng": "libc srand/rand; same pinned runtime only",
        "normalization": "none",
        "residual_waveform_bypass": false,
        "noise_band_edges_hz": [
          2000,
          4000,
          8000
        ]
      },
      "status": "measured",
      "seconds": 0.04635971099924063,
      "rtf": 0.05794963874905079,
      "output_sha256": "2c233b82bace0141eacb0b473e986ec72cf61aacfdaf658547f39e0386f80500",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 38400,
        "output_samples": 38400,
        "length_delta_samples": 0,
        "sample_rate": 48000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 240,
            "hop_samples": 60,
            "log_magnitude_mae_db": 21.783089350873936,
            "spectral_convergence": 0.8298509413415148,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 4.1666666666666676e-08
          },
          {
            "window_ms": 20,
            "window_samples": 960,
            "hop_samples": 240,
            "log_magnitude_mae_db": 27.017379377809892,
            "spectral_convergence": 0.415579132127508,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.0416666666666669e-08
          },
          {
            "window_ms": 80,
            "window_samples": 3840,
            "hop_samples": 960,
            "log_magnitude_mae_db": 31.172694537992985,
            "spectral_convergence": 0.3726211880478947,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 2.6041666666666672e-09
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 5.408393012152778e-08,
              "output_power": 7.0542005389271e-08,
              "delta_db": 1.1537955876650026,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 8.138020833333332e-08,
              "output_power": 6.623101463788135e-08,
              "delta_db": -0.8945738896267537,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 1.3563368055555558e-07,
              "output_power": 1.730737160467199e-07,
              "delta_db": 1.0586357153804167,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 2.7126736111111116e-07,
              "output_power": 2.8657091260009804e-07,
              "delta_db": 0.2383456413012109,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 5.425347222222223e-07,
              "output_power": 4.943490998217765e-07,
              "delta_db": -0.40393790586591116,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 1.0850694444444447e-06,
              "output_power": 1.1196851517801278e-06,
              "delta_db": 0.1363838511763638,
              "reference_active": true
            },
            {
              "low_hz": 8000.0,
              "high_hz": 16000.0,
              "reference_power": 2.1701388888888893e-06,
              "output_power": 2.3644206831672783e-06,
              "delta_db": 0.37237220172587693,
              "reference_active": true
            },
            {
              "low_hz": 16000.0,
              "high_hz": 24000.0,
              "reference_power": 2.170308430989584e-06,
              "output_power": 2.3807825148928714e-06,
              "delta_db": 0.4019826678606283,
              "reference_active": true
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 8,
          "band_count": 8,
          "active_band_mae_db": 0.5825034325752705,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.28729254724399406,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 3840
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 73,
          "expected_voiced_frames": 0,
          "expected_unvoiced_frames": 73,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 0,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": null,
          "abs_error_cents_p95": null,
          "voiced_detection_rate": null,
          "unvoiced_false_positive_rate": 0.0,
          "score_status": "no_valid_voiced_frames",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -51.57661960971094,
        "output_peak": 0.08624784416881828,
        "reference_rms_dbfs": -51.86391215695493,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 26.65772108889227
      },
      "event": {
        "status": "peak_energy_diagnostic",
        "expected_s": 0.3,
        "detected_s": 0.30004166666666665,
        "error_ms": 0.04166666666666208
      }
    },
    {
      "case": "librispeech_5142-36586_first6s",
      "kind": "natural_speech",
      "method": "identity",
      "base_method": "world_harvest",
      "decoder_family": "none",
      "f0_source": null,
      "role": "measurement_sanity_only_not_a_vocoder",
      "status": "measured",
      "seconds": 7.486100003006868e-05,
      "rtf": 1.247683333834478e-05,
      "output_sha256": "fb11faac58eb060bfc90577e429d21abde1194225c538d10f6dfcdbc6f65fa20",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 96000,
        "output_samples": 96000,
        "length_delta_samples": 0,
        "sample_rate": 16000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 80,
            "hop_samples": 20,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 9.142335289882602e-07
          },
          {
            "window_ms": 20,
            "window_samples": 320,
            "hop_samples": 80,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 6.848824211945687e-07
          },
          {
            "window_ms": 80,
            "window_samples": 1280,
            "hop_samples": 320,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 4.856831169332098e-07
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.0001524928320973097,
              "output_power": 0.0001524928320973097,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.000614847570631693,
              "output_power": 0.000614847570631693,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.0006546222632577629,
              "output_power": 0.0006546222632577629,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.00045735665465447865,
              "output_power": 0.00045735665465447865,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.0005074094182988508,
              "output_power": 0.0005074094182988508,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 0.0001454970054415293,
              "output_power": 0.0001454970054415293,
              "delta_db": 0.0,
              "reference_active": true
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 6,
          "band_count": 6,
          "active_band_mae_db": 0.0,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.0,
        "pitch": null,
        "output_rms_dbfs": -25.964975801834793,
        "output_peak": 0.3843994140625,
        "reference_rms_dbfs": -25.964975801834793,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 0.0
      }
    },
    {
      "case": "librispeech_5142-36586_first6s",
      "kind": "natural_speech",
      "method": "world_dio",
      "base_method": "world_harvest",
      "decoder_family": "WORLD",
      "f0_source": "WORLD DIO+StoneMask",
      "native_length_policy": "C API synthesizes requested n_samples directly; no crop/pad",
      "feature_scalars": 1233427,
      "feature_f0_voiced_fraction": 0.5953372189841799,
      "status": "measured",
      "seconds": 0.36598923199926503,
      "rtf": 0.06099820533321084,
      "output_sha256": "871eeefdd7bb411a415dc35a08044a56dc7cc779284712ce8564391afbdbd3f4",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 96000,
        "output_samples": 96000,
        "length_delta_samples": 0,
        "sample_rate": 16000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 80,
            "hop_samples": 20,
            "log_magnitude_mae_db": 5.780766710388987,
            "spectral_convergence": 0.5003276511750807,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 9.142335289882602e-07
          },
          {
            "window_ms": 20,
            "window_samples": 320,
            "hop_samples": 80,
            "log_magnitude_mae_db": 5.269470221793124,
            "spectral_convergence": 0.3094373066007705,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 6.848824211945687e-07
          },
          {
            "window_ms": 80,
            "window_samples": 1280,
            "hop_samples": 320,
            "log_magnitude_mae_db": 5.767231992107476,
            "spectral_convergence": 0.36763543593217546,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 4.856831169332098e-07
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.0001524928320973097,
              "output_power": 0.00015770845119541393,
              "delta_db": 0.14605536475310815,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.000614847570631693,
              "output_power": 0.0007594142636262377,
              "delta_db": 0.9171128857170214,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.0006546222632577629,
              "output_power": 0.0008252453151773038,
              "delta_db": 1.0059229628656317,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.00045735665465447865,
              "output_power": 0.00054774655653935,
              "delta_db": 0.7832465344680328,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.0005074094182988508,
              "output_power": 0.0005681283963716315,
              "delta_db": 0.49087972728961227,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 0.0001454970054415293,
              "output_power": 0.00017518154976433497,
              "delta_db": 0.8063430911439224,
              "reference_active": true
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 6,
          "band_count": 6,
          "active_band_mae_db": 0.6915934277062216,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.7843077496352241,
        "pitch": null,
        "output_rms_dbfs": -25.18066805219957,
        "output_peak": 0.5826988065572866,
        "reference_rms_dbfs": -25.964975801834793,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 5.605822974763195
      }
    },
    {
      "case": "librispeech_5142-36586_first6s",
      "kind": "natural_speech",
      "method": "world_harvest",
      "base_method": "world_harvest",
      "decoder_family": "WORLD",
      "f0_source": "WORLD Harvest",
      "native_length_policy": "C API synthesizes requested n_samples directly; no crop/pad",
      "feature_scalars": 1233427,
      "feature_f0_voiced_fraction": 0.7735220649458784,
      "status": "measured",
      "seconds": 1.4932828759992844,
      "rtf": 0.24888047933321408,
      "output_sha256": "7d5527503b8cef6b60d0506e2df27eb3a98a3e56f8c9ff656d9ad843ccb1bd5b",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 96000,
        "output_samples": 96000,
        "length_delta_samples": 0,
        "sample_rate": 16000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 80,
            "hop_samples": 20,
            "log_magnitude_mae_db": 6.10941251463186,
            "spectral_convergence": 0.5639174343431934,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 9.142335289882602e-07
          },
          {
            "window_ms": 20,
            "window_samples": 320,
            "hop_samples": 80,
            "log_magnitude_mae_db": 5.208985333695928,
            "spectral_convergence": 0.3124939131232364,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 6.848824211945687e-07
          },
          {
            "window_ms": 80,
            "window_samples": 1280,
            "hop_samples": 320,
            "log_magnitude_mae_db": 5.7240752440415275,
            "spectral_convergence": 0.3722333970732282,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 4.856831169332098e-07
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.0001524928320973097,
              "output_power": 0.00015728640477724322,
              "delta_db": 0.13441755310471928,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.000614847570631693,
              "output_power": 0.0007514214282821413,
              "delta_db": 0.8711611427460408,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.0006546222632577629,
              "output_power": 0.000828964567262946,
              "delta_db": 1.0254519645540974,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.00045735665465447865,
              "output_power": 0.0005514671190115949,
              "delta_db": 0.8126462036645672,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.0005074094182988508,
              "output_power": 0.0005674202726196371,
              "delta_db": 0.4854632394497235,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 0.0001454970054415293,
              "output_power": 0.0001690475073217216,
              "delta_db": 0.6515471634323245,
              "reference_active": true
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 6,
          "band_count": 6,
          "active_band_mae_db": 0.6634478778252454,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.7731013942081144,
        "pitch": null,
        "output_rms_dbfs": -25.191874407626678,
        "output_peak": 0.5786482982903574,
        "reference_rms_dbfs": -25.964975801834793,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 5.680824364123104
      }
    },
    {
      "case": "librispeech_5142-36586_first6s",
      "kind": "natural_speech",
      "method": "llsm_world_dio",
      "base_method": "world_harvest",
      "decoder_family": "LLSM layer0",
      "f0_source": "WORLD DIO+StoneMask",
      "native_metadata": {
        "method": "llsm-layer0-czt-external-f0",
        "sample_rate": 16000,
        "input_samples": 96000,
        "output_samples": 96000,
        "native_output_samples": 96160,
        "trimmed_tail_samples": 160,
        "fixed_delay_samples": 0,
        "hop_seconds": 0.005,
        "seed": 0,
        "f0_refine": false,
        "native_rng_seed": 1,
        "rng": "libc srand/rand; same pinned runtime only",
        "normalization": "none",
        "residual_waveform_bypass": false,
        "noise_band_edges_hz": [
          2000,
          4000
        ]
      },
      "status": "measured",
      "seconds": 0.21951600200191024,
      "rtf": 0.036586000333651704,
      "output_sha256": "e4681d4499a9832220abe6a6c3d3405df513da1f77cbccf69684bc3570d209b5",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 96000,
        "output_samples": 96000,
        "length_delta_samples": 0,
        "sample_rate": 16000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 80,
            "hop_samples": 20,
            "log_magnitude_mae_db": 4.557466104269077,
            "spectral_convergence": 0.18517180189067128,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 9.142335289882602e-07
          },
          {
            "window_ms": 20,
            "window_samples": 320,
            "hop_samples": 80,
            "log_magnitude_mae_db": 4.4974882551641056,
            "spectral_convergence": 0.1804181198283386,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 6.848824211945687e-07
          },
          {
            "window_ms": 80,
            "window_samples": 1280,
            "hop_samples": 320,
            "log_magnitude_mae_db": 4.8952520347708495,
            "spectral_convergence": 0.18917695137752177,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 4.856831169332098e-07
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.0001524928320973097,
              "output_power": 0.0001492870754831238,
              "delta_db": -0.09227219873897524,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.000614847570631693,
              "output_power": 0.0006014112181900091,
              "delta_db": -0.09595936620430062,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.0006546222632577629,
              "output_power": 0.0006190819914151431,
              "delta_db": -0.24242600354850766,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.00045735665465447865,
              "output_power": 0.0004046199052478531,
              "delta_db": -0.5320775851419317,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.0005074094182988508,
              "output_power": 0.00044553071231770707,
              "delta_db": -0.5648087697216098,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 0.0001454970054415293,
              "output_power": 0.00012803989047721964,
              "delta_db": -0.5550876096127298,
              "reference_active": true
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 6,
          "band_count": 6,
          "active_band_mae_db": 0.3471052554946758,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": -0.32809729481534744,
        "pitch": null,
        "output_rms_dbfs": -26.29307309665014,
        "output_peak": 0.36957781585317984,
        "reference_rms_dbfs": -25.964975801834793,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 4.65006879806801
      }
    },
    {
      "case": "librispeech_7021-79759_first6s",
      "kind": "natural_speech",
      "method": "identity",
      "base_method": "world_harvest",
      "decoder_family": "none",
      "f0_source": null,
      "role": "measurement_sanity_only_not_a_vocoder",
      "status": "measured",
      "seconds": 5.326799873728305e-05,
      "rtf": 8.877999789547175e-06,
      "output_sha256": "facaba4a2055af5fff34620adaeb08e028f3f04a1045b6b8a2a6dfadc01c3de0",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 96000,
        "output_samples": 96000,
        "length_delta_samples": 0,
        "sample_rate": 16000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 80,
            "hop_samples": 20,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.917174240126096e-06
          },
          {
            "window_ms": 20,
            "window_samples": 320,
            "hop_samples": 80,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.3764120923669142e-06
          },
          {
            "window_ms": 80,
            "window_samples": 1280,
            "hop_samples": 320,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 9.65726411302904e-07
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.0016535338650408523,
              "output_power": 0.0016535338650408523,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.0014061361443478543,
              "output_power": 0.0014061361443478543,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.00023886716309266744,
              "output_power": 0.00023886716309266744,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.00017008225892163728,
              "output_power": 0.00017008225892163728,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 5.1305941766241635e-05,
              "output_power": 5.1305941766241635e-05,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 2.4673803234657673e-05,
              "output_power": 2.4673803234657673e-05,
              "delta_db": 0.0,
              "reference_active": true
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 6,
          "band_count": 6,
          "active_band_mae_db": 0.0,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.0,
        "pitch": null,
        "output_rms_dbfs": -24.504328677638092,
        "output_peak": 0.61859130859375,
        "reference_rms_dbfs": -24.504328677638092,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 0.0
      }
    },
    {
      "case": "librispeech_7021-79759_first6s",
      "kind": "natural_speech",
      "method": "world_dio",
      "base_method": "world_harvest",
      "decoder_family": "WORLD",
      "f0_source": "WORLD DIO+StoneMask",
      "native_length_policy": "C API synthesizes requested n_samples directly; no crop/pad",
      "feature_scalars": 1233427,
      "feature_f0_voiced_fraction": 0.4496253122398002,
      "status": "measured",
      "seconds": 0.33881692299837596,
      "rtf": 0.05646948716639599,
      "output_sha256": "b9fcbf0fbb053fa1768a24a2429d88d6f62b382d1510392ba7765f1fe047dd4e",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 96000,
        "output_samples": 96000,
        "length_delta_samples": 0,
        "sample_rate": 16000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 80,
            "hop_samples": 20,
            "log_magnitude_mae_db": 6.021277515884432,
            "spectral_convergence": 0.6224706241323026,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.917174240126096e-06
          },
          {
            "window_ms": 20,
            "window_samples": 320,
            "hop_samples": 80,
            "log_magnitude_mae_db": 5.183696467102126,
            "spectral_convergence": 0.2869730148434956,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.3764120923669142e-06
          },
          {
            "window_ms": 80,
            "window_samples": 1280,
            "hop_samples": 320,
            "log_magnitude_mae_db": 5.080220653559571,
            "spectral_convergence": 0.2923970819674867,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 9.65726411302904e-07
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.0016535338650408523,
              "output_power": 0.0017970612446903478,
              "delta_db": 0.3614978445383607,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.0014061361443478543,
              "output_power": 0.0018143310492824965,
              "delta_db": 1.1068916106184363,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.00023886716309266744,
              "output_power": 0.0003010776213368117,
              "delta_db": 1.0052202454858699,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.00017008225892163728,
              "output_power": 0.00022436652761971394,
              "delta_db": 1.2029905145770468,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 5.1305941766241635e-05,
              "output_power": 5.551953424722817e-05,
              "delta_db": 0.3427815028930436,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 2.4673803234657673e-05,
              "output_power": 2.8467651317503955e-05,
              "delta_db": 0.6211554072693686,
              "reference_active": true
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 6,
          "band_count": 6,
          "active_band_mae_db": 0.7734228542303542,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.7583007285067427,
        "pitch": null,
        "output_rms_dbfs": -23.746027949131353,
        "output_peak": 0.6632033133674022,
        "reference_rms_dbfs": -24.504328677638092,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 5.428398212182043
      }
    },
    {
      "case": "librispeech_7021-79759_first6s",
      "kind": "natural_speech",
      "method": "world_harvest",
      "base_method": "world_harvest",
      "decoder_family": "WORLD",
      "f0_source": "WORLD Harvest",
      "native_length_policy": "C API synthesizes requested n_samples directly; no crop/pad",
      "feature_scalars": 1233427,
      "feature_f0_voiced_fraction": 0.6144879267277269,
      "status": "measured",
      "seconds": 1.2991590870005894,
      "rtf": 0.21652651450009822,
      "output_sha256": "7a873db9147013d517d9b370443f89a8158512cfc1df1f1ff22c080a914be842",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 96000,
        "output_samples": 96000,
        "length_delta_samples": 0,
        "sample_rate": 16000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 80,
            "hop_samples": 20,
            "log_magnitude_mae_db": 6.1358560362292325,
            "spectral_convergence": 0.6607251569792845,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.917174240126096e-06
          },
          {
            "window_ms": 20,
            "window_samples": 320,
            "hop_samples": 80,
            "log_magnitude_mae_db": 5.049628320375352,
            "spectral_convergence": 0.28908726102190296,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.3764120923669142e-06
          },
          {
            "window_ms": 80,
            "window_samples": 1280,
            "hop_samples": 320,
            "log_magnitude_mae_db": 4.993938531831541,
            "spectral_convergence": 0.2966448039870962,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 9.65726411302904e-07
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.0016535338650408523,
              "output_power": 0.0018193296068102396,
              "delta_db": 0.41498293185007207,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.0014061361443478543,
              "output_power": 0.00180330962528755,
              "delta_db": 1.0804292896563967,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.00023886716309266744,
              "output_power": 0.00031354901824534435,
              "delta_db": 1.1814899360775613,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.00017008225892163728,
              "output_power": 0.00021645015119688536,
              "delta_db": 1.04698878283336,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 5.1305941766241635e-05,
              "output_power": 5.6694318658357245e-05,
              "delta_db": 0.4337187651185515,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 2.4673803234657673e-05,
              "output_power": 3.0431313130909454e-05,
              "delta_db": 0.9108459579278807,
              "reference_active": true
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 6,
          "band_count": 6,
          "active_band_mae_db": 0.8447426105773038,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.7777455410307089,
        "pitch": null,
        "output_rms_dbfs": -23.72658313660739,
        "output_peak": 0.6620443060906042,
        "reference_rms_dbfs": -24.504328677638092,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 5.3931409628120415
      }
    },
    {
      "case": "librispeech_7021-79759_first6s",
      "kind": "natural_speech",
      "method": "llsm_world_dio",
      "base_method": "world_harvest",
      "decoder_family": "LLSM layer0",
      "f0_source": "WORLD DIO+StoneMask",
      "native_metadata": {
        "method": "llsm-layer0-czt-external-f0",
        "sample_rate": 16000,
        "input_samples": 96000,
        "output_samples": 96000,
        "native_output_samples": 96160,
        "trimmed_tail_samples": 160,
        "fixed_delay_samples": 0,
        "hop_seconds": 0.005,
        "seed": 0,
        "f0_refine": false,
        "native_rng_seed": 1,
        "rng": "libc srand/rand; same pinned runtime only",
        "normalization": "none",
        "residual_waveform_bypass": false,
        "noise_band_edges_hz": [
          2000,
          4000
        ]
      },
      "status": "measured",
      "seconds": 0.22848497400264023,
      "rtf": 0.03808082900044004,
      "output_sha256": "9d6f8971c24ae140efc42de20615a9dcd772b036c2726b8dfb01976406c3ca2b",
      "repeat_max_abs_diff": 0.0,
      "measurement": {
        "status": "ok",
        "reference_samples": 96000,
        "output_samples": 96000,
        "length_delta_samples": 0,
        "sample_rate": 16000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 80,
            "hop_samples": 20,
            "log_magnitude_mae_db": 4.830450078892739,
            "spectral_convergence": 0.16537668059229457,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.917174240126096e-06
          },
          {
            "window_ms": 20,
            "window_samples": 320,
            "hop_samples": 80,
            "log_magnitude_mae_db": 4.1877694413867745,
            "spectral_convergence": 0.15594076748035268,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.3764120923669142e-06
          },
          {
            "window_ms": 80,
            "window_samples": 1280,
            "hop_samples": 320,
            "log_magnitude_mae_db": 4.247675476386883,
            "spectral_convergence": 0.16243078857335919,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 9.65726411302904e-07
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.0016535338650408523,
              "output_power": 0.001556671776971397,
              "delta_db": -0.2621604229887118,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.0014061361443478543,
              "output_power": 0.0013327691455335695,
              "delta_db": -0.2327244182374224,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.00023886716309266744,
              "output_power": 0.0001951135799346023,
              "delta_db": -0.8786895427651986,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.00017008225892163728,
              "output_power": 0.00014049210743961686,
              "delta_db": -0.8300708808645183,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 5.1305941766241635e-05,
              "output_power": 4.753366837745065e-05,
              "delta_db": -0.3316633192152061,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 2.4673803234657673e-05,
              "output_power": 2.1329302713727327e-05,
              "delta_db": -0.632594391022286,
              "reference_active": true
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 6,
          "band_count": 6,
          "active_band_mae_db": 0.5279838291822238,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": -0.31855458782112495,
        "pitch": null,
        "output_rms_dbfs": -24.822883265459218,
        "output_peak": 0.5614663838123222,
        "reference_rms_dbfs": -24.504328677638092,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 4.421964998888799
      }
    }
  ],
  "operations": [
    {
      "case": "harmonic_110_16000",
      "method": "world_dio",
      "operation": "pitch_up3",
      "request": {
        "pitch_semitones": 3
      },
      "status": "measured",
      "requested_samples": 19200,
      "output_samples": 19200,
      "length_error_samples": 0,
      "finite": true,
      "peak": 0.498701027479436,
      "level_delta_db": -0.41733143954479257,
      "relative_pitch": {
        "status": "estimated_relative_change_not_ground_truth",
        "total_frames": 113,
        "valid_pairs": 113,
        "voiced_in_base": 113,
        "voiced_in_edit": 113,
        "p95_error_cents": 0.10530122042471247
      },
      "pitch_against_known_truth": {
        "estimator": "independent-yin-difference-v2-prefiltered",
        "frame_ms": 80.0,
        "hop_ms": 10.0,
        "prefilter": {
          "kind": "butterworth-forward-backward",
          "order_per_pass": 6,
          "cutoff_hz": 2000.0,
          "pad_type": "even",
          "max_pad_samples": 1280
        },
        "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
        "fmin_hz": 65.0,
        "fmax_hz": 700.0,
        "total_frames": 113,
        "expected_voiced_frames": 113,
        "expected_unvoiced_frames": 0,
        "boundary_frames": 0,
        "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
        "valid_voiced_frames": 113,
        "missing_voiced_frames": 0,
        "false_voiced_frames": 0,
        "gross_pitch_error_frames": 0,
        "abs_error_cents_median": 0.06763497624969077,
        "abs_error_cents_p95": 0.13314141068447471,
        "voiced_detection_rate": 1.0,
        "unvoiced_false_positive_rate": null,
        "score_status": "ok",
        "uncovered_tail_samples": 0
      }
    },
    {
      "case": "harmonic_110_16000",
      "method": "world_dio",
      "operation": "pitch_down3",
      "request": {
        "pitch_semitones": -3
      },
      "status": "measured",
      "requested_samples": 19200,
      "output_samples": 19200,
      "length_error_samples": 0,
      "finite": true,
      "peak": 0.6635989895463612,
      "level_delta_db": -0.06563787585714172,
      "relative_pitch": {
        "status": "estimated_relative_change_not_ground_truth",
        "total_frames": 113,
        "valid_pairs": 113,
        "voiced_in_base": 113,
        "voiced_in_edit": 113,
        "p95_error_cents": 0.14153018958583016
      },
      "pitch_against_known_truth": {
        "estimator": "independent-yin-difference-v2-prefiltered",
        "frame_ms": 80.0,
        "hop_ms": 10.0,
        "prefilter": {
          "kind": "butterworth-forward-backward",
          "order_per_pass": 6,
          "cutoff_hz": 2000.0,
          "pad_type": "even",
          "max_pad_samples": 1280
        },
        "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
        "fmin_hz": 65.0,
        "fmax_hz": 700.0,
        "total_frames": 113,
        "expected_voiced_frames": 113,
        "expected_unvoiced_frames": 0,
        "boundary_frames": 0,
        "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
        "valid_voiced_frames": 113,
        "missing_voiced_frames": 0,
        "false_voiced_frames": 0,
        "gross_pitch_error_frames": 0,
        "abs_error_cents_median": 0.029122196835789677,
        "abs_error_cents_p95": 0.10427167989331518,
        "voiced_detection_rate": 1.0,
        "unvoiced_false_positive_rate": null,
        "score_status": "ok",
        "uncovered_tail_samples": 0
      }
    },
    {
      "case": "harmonic_110_16000",
      "method": "world_dio",
      "operation": "gain_up6",
      "request": {
        "gain_db": 6
      },
      "status": "measured",
      "requested_samples": 19200,
      "output_samples": 19200,
      "length_error_samples": 0,
      "finite": true,
      "peak": 1.1524797951850694,
      "level_delta_db": 6.000019237695044,
      "gain_tracking_error_db": 1.9237695044083125e-05,
      "relative_pitch": {
        "status": "estimated_relative_change_not_ground_truth",
        "total_frames": 113,
        "valid_pairs": 113,
        "voiced_in_base": 113,
        "voiced_in_edit": 113,
        "p95_error_cents": 0.022719445653616634
      },
      "pitch_against_known_truth": {
        "estimator": "independent-yin-difference-v2-prefiltered",
        "frame_ms": 80.0,
        "hop_ms": 10.0,
        "prefilter": {
          "kind": "butterworth-forward-backward",
          "order_per_pass": 6,
          "cutoff_hz": 2000.0,
          "pad_type": "even",
          "max_pad_samples": 1280
        },
        "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
        "fmin_hz": 65.0,
        "fmax_hz": 700.0,
        "total_frames": 113,
        "expected_voiced_frames": 113,
        "expected_unvoiced_frames": 0,
        "boundary_frames": 0,
        "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
        "valid_voiced_frames": 113,
        "missing_voiced_frames": 0,
        "false_voiced_frames": 0,
        "gross_pitch_error_frames": 0,
        "abs_error_cents_median": 0.04319720228360298,
        "abs_error_cents_p95": 0.1052436738273434,
        "voiced_detection_rate": 1.0,
        "unvoiced_false_positive_rate": null,
        "score_status": "ok",
        "uncovered_tail_samples": 0
      }
    },
    {
      "case": "harmonic_110_16000",
      "method": "world_dio",
      "operation": "gain_down6",
      "request": {
        "gain_db": -6
      },
      "status": "measured",
      "requested_samples": 19200,
      "output_samples": 19200,
      "length_error_samples": 0,
      "finite": true,
      "peak": 0.28941970442878606,
      "level_delta_db": -6.000023579984042,
      "gain_tracking_error_db": -2.3579984041788293e-05,
      "relative_pitch": {
        "status": "estimated_relative_change_not_ground_truth",
        "total_frames": 113,
        "valid_pairs": 113,
        "voiced_in_base": 113,
        "voiced_in_edit": 113,
        "p95_error_cents": 0.013524071883013493
      },
      "pitch_against_known_truth": {
        "estimator": "independent-yin-difference-v2-prefiltered",
        "frame_ms": 80.0,
        "hop_ms": 10.0,
        "prefilter": {
          "kind": "butterworth-forward-backward",
          "order_per_pass": 6,
          "cutoff_hz": 2000.0,
          "pad_type": "even",
          "max_pad_samples": 1280
        },
        "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
        "fmin_hz": 65.0,
        "fmax_hz": 700.0,
        "total_frames": 113,
        "expected_voiced_frames": 113,
        "expected_unvoiced_frames": 0,
        "boundary_frames": 0,
        "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
        "valid_voiced_frames": 113,
        "missing_voiced_frames": 0,
        "false_voiced_frames": 0,
        "gross_pitch_error_frames": 0,
        "abs_error_cents_median": 0.026713038823358678,
        "abs_error_cents_p95": 0.07566051497729248,
        "voiced_detection_rate": 1.0,
        "unvoiced_false_positive_rate": null,
        "score_status": "ok",
        "uncovered_tail_samples": 0
      }
    },
    {
      "case": "harmonic_110_16000",
      "method": "world_dio",
      "operation": "time_1p25",
      "request": {
        "time_scale": 1.25
      },
      "status": "measured",
      "requested_samples": 24000,
      "output_samples": 24000,
      "length_error_samples": 0,
      "finite": true,
      "peak": 0.5750174844937213,
      "level_delta_db": 0.0018257764934879947
    },
    {
      "case": "harmonic_110_16000",
      "method": "world_harvest",
      "operation": "pitch_up3",
      "request": {
        "pitch_semitones": 3
      },
      "status": "measured",
      "requested_samples": 19200,
      "output_samples": 19200,
      "length_error_samples": 0,
      "finite": true,
      "peak": 0.4876240578596896,
      "level_delta_db": -0.41851722545455217,
      "relative_pitch": {
        "status": "estimated_relative_change_not_ground_truth",
        "total_frames": 113,
        "valid_pairs": 113,
        "voiced_in_base": 113,
        "voiced_in_edit": 113,
        "p95_error_cents": 0.11633768576680259
      },
      "pitch_against_known_truth": {
        "estimator": "independent-yin-difference-v2-prefiltered",
        "frame_ms": 80.0,
        "hop_ms": 10.0,
        "prefilter": {
          "kind": "butterworth-forward-backward",
          "order_per_pass": 6,
          "cutoff_hz": 2000.0,
          "pad_type": "even",
          "max_pad_samples": 1280
        },
        "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
        "fmin_hz": 65.0,
        "fmax_hz": 700.0,
        "total_frames": 113,
        "expected_voiced_frames": 113,
        "expected_unvoiced_frames": 0,
        "boundary_frames": 0,
        "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
        "valid_voiced_frames": 113,
        "missing_voiced_frames": 0,
        "false_voiced_frames": 0,
        "gross_pitch_error_frames": 0,
        "abs_error_cents_median": 0.06813618101485862,
        "abs_error_cents_p95": 0.11705776257098252,
        "voiced_detection_rate": 1.0,
        "unvoiced_false_positive_rate": null,
        "score_status": "ok",
        "uncovered_tail_samples": 0
      }
    },
    {
      "case": "harmonic_110_16000",
      "method": "world_harvest",
      "operation": "pitch_down3",
      "request": {
        "pitch_semitones": -3
      },
      "status": "measured",
      "requested_samples": 19200,
      "output_samples": 19200,
      "length_error_samples": 0,
      "finite": true,
      "peak": 0.6348204886974946,
      "level_delta_db": -0.07050323361226307,
      "relative_pitch": {
        "status": "estimated_relative_change_not_ground_truth",
        "total_frames": 113,
        "valid_pairs": 113,
        "voiced_in_base": 113,
        "voiced_in_edit": 113,
        "p95_error_cents": 0.07889099532502522
      },
      "pitch_against_known_truth": {
        "estimator": "independent-yin-difference-v2-prefiltered",
        "frame_ms": 80.0,
        "hop_ms": 10.0,
        "prefilter": {
          "kind": "butterworth-forward-backward",
          "order_per_pass": 6,
          "cutoff_hz": 2000.0,
          "pad_type": "even",
          "max_pad_samples": 1280
        },
        "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
        "fmin_hz": 65.0,
        "fmax_hz": 700.0,
        "total_frames": 113,
        "expected_voiced_frames": 113,
        "expected_unvoiced_frames": 0,
        "boundary_frames": 0,
        "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
        "valid_voiced_frames": 113,
        "missing_voiced_frames": 0,
        "false_voiced_frames": 0,
        "gross_pitch_error_frames": 0,
        "abs_error_cents_median": 0.024840883060457734,
        "abs_error_cents_p95": 0.07543729063567649,
        "voiced_detection_rate": 1.0,
        "unvoiced_false_positive_rate": null,
        "score_status": "ok",
        "uncovered_tail_samples": 0
      }
    },
    {
      "case": "harmonic_110_16000",
      "method": "world_harvest",
      "operation": "gain_up6",
      "request": {
        "gain_db": 6
      },
      "status": "measured",
      "requested_samples": 19200,
      "output_samples": 19200,
      "length_error_samples": 0,
      "finite": true,
      "peak": 1.1308026786706709,
      "level_delta_db": 6.000008823364155,
      "gain_tracking_error_db": 8.823364154864066e-06,
      "relative_pitch": {
        "status": "estimated_relative_change_not_ground_truth",
        "total_frames": 113,
        "valid_pairs": 113,
        "voiced_in_base": 113,
        "voiced_in_edit": 113,
        "p95_error_cents": 0.019531252708280152
      },
      "pitch_against_known_truth": {
        "estimator": "independent-yin-difference-v2-prefiltered",
        "frame_ms": 80.0,
        "hop_ms": 10.0,
        "prefilter": {
          "kind": "butterworth-forward-backward",
          "order_per_pass": 6,
          "cutoff_hz": 2000.0,
          "pad_type": "even",
          "max_pad_samples": 1280
        },
        "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
        "fmin_hz": 65.0,
        "fmax_hz": 700.0,
        "total_frames": 113,
        "expected_voiced_frames": 113,
        "expected_unvoiced_frames": 0,
        "boundary_frames": 0,
        "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
        "valid_voiced_frames": 113,
        "missing_voiced_frames": 0,
        "false_voiced_frames": 0,
        "gross_pitch_error_frames": 0,
        "abs_error_cents_median": 0.02951673529299493,
        "abs_error_cents_p95": 0.07156545515519726,
        "voiced_detection_rate": 1.0,
        "unvoiced_false_positive_rate": null,
        "score_status": "ok",
        "uncovered_tail_samples": 0
      }
    },
    {
      "case": "harmonic_110_16000",
      "method": "world_harvest",
      "operation": "gain_down6",
      "request": {
        "gain_db": -6
      },
      "status": "measured",
      "requested_samples": 19200,
      "output_samples": 19200,
      "length_error_samples": 0,
      "finite": true,
      "peak": 0.28100983208283814,
      "level_delta_db": -6.000011536063363,
      "gain_tracking_error_db": -1.1536063363237758e-05,
      "relative_pitch": {
        "status": "estimated_relative_change_not_ground_truth",
        "total_frames": 113,
        "valid_pairs": 113,
        "voiced_in_base": 113,
        "voiced_in_edit": 113,
        "p95_error_cents": 0.010985078003571597
      },
      "pitch_against_known_truth": {
        "estimator": "independent-yin-difference-v2-prefiltered",
        "frame_ms": 80.0,
        "hop_ms": 10.0,
        "prefilter": {
          "kind": "butterworth-forward-backward",
          "order_per_pass": 6,
          "cutoff_hz": 2000.0,
          "pad_type": "even",
          "max_pad_samples": 1280
        },
        "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
        "fmin_hz": 65.0,
        "fmax_hz": 700.0,
        "total_frames": 113,
        "expected_voiced_frames": 113,
        "expected_unvoiced_frames": 0,
        "boundary_frames": 0,
        "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
        "valid_voiced_frames": 113,
        "missing_voiced_frames": 0,
        "false_voiced_frames": 0,
        "gross_pitch_error_frames": 0,
        "abs_error_cents_median": 0.020935277418551047,
        "abs_error_cents_p95": 0.05337249981565488,
        "voiced_detection_rate": 1.0,
        "unvoiced_false_positive_rate": null,
        "score_status": "ok",
        "uncovered_tail_samples": 0
      }
    },
    {
      "case": "harmonic_110_16000",
      "method": "world_harvest",
      "operation": "time_1p25",
      "request": {
        "time_scale": 1.25
      },
      "status": "measured",
      "requested_samples": 24000,
      "output_samples": 24000,
      "length_error_samples": 0,
      "finite": true,
      "peak": 0.5685819588171438,
      "level_delta_db": -0.002559343972264788
    },
    {
      "case": "voiced_unvoiced_boundaries_16000",
      "method": "world_dio",
      "operation": "pitch_up3",
      "request": {
        "pitch_semitones": 3
      },
      "status": "measured",
      "requested_samples": 25600,
      "output_samples": 25600,
      "length_error_samples": 0,
      "finite": true,
      "peak": 0.6415733608311935,
      "level_delta_db": -0.2962163006145991,
      "relative_pitch": {
        "status": "estimated_relative_change_not_ground_truth",
        "total_frames": 153,
        "valid_pairs": 99,
        "voiced_in_base": 99,
        "voiced_in_edit": 100,
        "p95_error_cents": 0.6887184378975997
      },
      "pitch_against_known_truth": {
        "estimator": "independent-yin-difference-v2-prefiltered",
        "frame_ms": 80.0,
        "hop_ms": 10.0,
        "prefilter": {
          "kind": "butterworth-forward-backward",
          "order_per_pass": 6,
          "cutoff_hz": 2000.0,
          "pad_type": "even",
          "max_pad_samples": 1280
        },
        "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
        "fmin_hz": 65.0,
        "fmax_hz": 700.0,
        "total_frames": 153,
        "expected_voiced_frames": 96,
        "expected_unvoiced_frames": 43,
        "boundary_frames": 14,
        "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
        "valid_voiced_frames": 96,
        "missing_voiced_frames": 0,
        "false_voiced_frames": 0,
        "gross_pitch_error_frames": 0,
        "abs_error_cents_median": 0.1429510506554753,
        "abs_error_cents_p95": 0.39917182092141656,
        "voiced_detection_rate": 1.0,
        "unvoiced_false_positive_rate": 0.0,
        "score_status": "ok",
        "uncovered_tail_samples": 0
      }
    },
    {
      "case": "voiced_unvoiced_boundaries_16000",
      "method": "world_dio",
      "operation": "pitch_down3",
      "request": {
        "pitch_semitones": -3
      },
      "status": "measured",
      "requested_samples": 25600,
      "output_samples": 25600,
      "length_error_samples": 0,
      "finite": true,
      "peak": 0.6182356961733753,
      "level_delta_db": -0.05630055950933459,
      "relative_pitch": {
        "status": "estimated_relative_change_not_ground_truth",
        "total_frames": 153,
        "valid_pairs": 99,
        "voiced_in_base": 99,
        "voiced_in_edit": 100,
        "p95_error_cents": 0.5992059432499247
      },
      "pitch_against_known_truth": {
        "estimator": "independent-yin-difference-v2-prefiltered",
        "frame_ms": 80.0,
        "hop_ms": 10.0,
        "prefilter": {
          "kind": "butterworth-forward-backward",
          "order_per_pass": 6,
          "cutoff_hz": 2000.0,
          "pad_type": "even",
          "max_pad_samples": 1280
        },
        "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
        "fmin_hz": 65.0,
        "fmax_hz": 700.0,
        "total_frames": 153,
        "expected_voiced_frames": 96,
        "expected_unvoiced_frames": 43,
        "boundary_frames": 14,
        "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
        "valid_voiced_frames": 96,
        "missing_voiced_frames": 0,
        "false_voiced_frames": 0,
        "gross_pitch_error_frames": 0,
        "abs_error_cents_median": 0.059263789336297154,
        "abs_error_cents_p95": 0.3001769389946395,
        "voiced_detection_rate": 1.0,
        "unvoiced_false_positive_rate": 0.0,
        "score_status": "ok",
        "uncovered_tail_samples": 0
      }
    },
    {
      "case": "voiced_unvoiced_boundaries_16000",
      "method": "world_dio",
      "operation": "gain_up6",
      "request": {
        "gain_db": 6
      },
      "status": "measured",
      "requested_samples": 25600,
      "output_samples": 25600,
      "length_error_samples": 0,
      "finite": true,
      "peak": 1.285010393002113,
      "level_delta_db": 6.0000042618417995,
      "gain_tracking_error_db": 4.2618417994688684e-06,
      "relative_pitch": {
        "status": "estimated_relative_change_not_ground_truth",
        "total_frames": 153,
        "valid_pairs": 99,
        "voiced_in_base": 99,
        "voiced_in_edit": 99,
        "p95_error_cents": 0.09847967908969989
      },
      "pitch_against_known_truth": {
        "estimator": "independent-yin-difference-v2-prefiltered",
        "frame_ms": 80.0,
        "hop_ms": 10.0,
        "prefilter": {
          "kind": "butterworth-forward-backward",
          "order_per_pass": 6,
          "cutoff_hz": 2000.0,
          "pad_type": "even",
          "max_pad_samples": 1280
        },
        "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
        "fmin_hz": 65.0,
        "fmax_hz": 700.0,
        "total_frames": 153,
        "expected_voiced_frames": 96,
        "expected_unvoiced_frames": 43,
        "boundary_frames": 14,
        "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
        "valid_voiced_frames": 96,
        "missing_voiced_frames": 0,
        "false_voiced_frames": 0,
        "gross_pitch_error_frames": 0,
        "abs_error_cents_median": 0.11553021652143158,
        "abs_error_cents_p95": 0.44817756765267935,
        "voiced_detection_rate": 1.0,
        "unvoiced_false_positive_rate": 0.0,
        "score_status": "ok",
        "uncovered_tail_samples": 0
      }
    },
    {
      "case": "voiced_unvoiced_boundaries_16000",
      "method": "world_dio",
      "operation": "gain_down6",
      "request": {
        "gain_db": -6
      },
      "status": "measured",
      "requested_samples": 25600,
      "output_samples": 25600,
      "length_error_samples": 0,
      "finite": true,
      "peak": 0.32278001705307996,
      "level_delta_db": -5.999996657059112,
      "gain_tracking_error_db": 3.3429408876628486e-06,
      "relative_pitch": {
        "status": "estimated_relative_change_not_ground_truth",
        "total_frames": 153,
        "valid_pairs": 99,
        "voiced_in_base": 99,
        "voiced_in_edit": 99,
        "p95_error_cents": 0.09105535498435718
      },
      "pitch_against_known_truth": {
        "estimator": "independent-yin-difference-v2-prefiltered",
        "frame_ms": 80.0,
        "hop_ms": 10.0,
        "prefilter": {
          "kind": "butterworth-forward-backward",
          "order_per_pass": 6,
          "cutoff_hz": 2000.0,
          "pad_type": "even",
          "max_pad_samples": 1280
        },
        "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
        "fmin_hz": 65.0,
        "fmax_hz": 700.0,
        "total_frames": 153,
        "expected_voiced_frames": 96,
        "expected_unvoiced_frames": 43,
        "boundary_frames": 14,
        "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
        "valid_voiced_frames": 96,
        "missing_voiced_frames": 0,
        "false_voiced_frames": 0,
        "gross_pitch_error_frames": 0,
        "abs_error_cents_median": 0.09114458502600291,
        "abs_error_cents_p95": 0.2903376996739103,
        "voiced_detection_rate": 1.0,
        "unvoiced_false_positive_rate": 0.0,
        "score_status": "ok",
        "uncovered_tail_samples": 0
      }
    },
    {
      "case": "voiced_unvoiced_boundaries_16000",
      "method": "world_dio",
      "operation": "time_1p25",
      "request": {
        "time_scale": 1.25
      },
      "status": "measured",
      "requested_samples": 32000,
      "output_samples": 32000,
      "length_error_samples": 0,
      "finite": true,
      "peak": 0.541721820532685,
      "level_delta_db": -0.17002404054721432
    },
    {
      "case": "voiced_unvoiced_boundaries_16000",
      "method": "world_harvest",
      "operation": "pitch_up3",
      "request": {
        "pitch_semitones": 3
      },
      "status": "measured",
      "requested_samples": 25600,
      "output_samples": 25600,
      "length_error_samples": 0,
      "finite": true,
      "peak": 0.569560314633061,
      "level_delta_db": -0.31966101206632674,
      "relative_pitch": {
        "status": "estimated_relative_change_not_ground_truth",
        "total_frames": 153,
        "valid_pairs": 98,
        "voiced_in_base": 98,
        "voiced_in_edit": 99,
        "p95_error_cents": 0.25784707463397977
      },
      "pitch_against_known_truth": {
        "estimator": "independent-yin-difference-v2-prefiltered",
        "frame_ms": 80.0,
        "hop_ms": 10.0,
        "prefilter": {
          "kind": "butterworth-forward-backward",
          "order_per_pass": 6,
          "cutoff_hz": 2000.0,
          "pad_type": "even",
          "max_pad_samples": 1280
        },
        "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
        "fmin_hz": 65.0,
        "fmax_hz": 700.0,
        "total_frames": 153,
        "expected_voiced_frames": 96,
        "expected_unvoiced_frames": 43,
        "boundary_frames": 14,
        "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
        "valid_voiced_frames": 96,
        "missing_voiced_frames": 0,
        "false_voiced_frames": 0,
        "gross_pitch_error_frames": 0,
        "abs_error_cents_median": 0.15755187311622332,
        "abs_error_cents_p95": 0.3834091787739956,
        "voiced_detection_rate": 1.0,
        "unvoiced_false_positive_rate": 0.0,
        "score_status": "ok",
        "uncovered_tail_samples": 0
      }
    },
    {
      "case": "voiced_unvoiced_boundaries_16000",
      "method": "world_harvest",
      "operation": "pitch_down3",
      "request": {
        "pitch_semitones": -3
      },
      "status": "measured",
      "requested_samples": 25600,
      "output_samples": 25600,
      "length_error_samples": 0,
      "finite": true,
      "peak": 0.5889707796915284,
      "level_delta_db": -0.059888268670240566,
      "relative_pitch": {
        "status": "estimated_relative_change_not_ground_truth",
        "total_frames": 153,
        "valid_pairs": 97,
        "voiced_in_base": 98,
        "voiced_in_edit": 98,
        "p95_error_cents": 0.23891190070239585
      },
      "pitch_against_known_truth": {
        "estimator": "independent-yin-difference-v2-prefiltered",
        "frame_ms": 80.0,
        "hop_ms": 10.0,
        "prefilter": {
          "kind": "butterworth-forward-backward",
          "order_per_pass": 6,
          "cutoff_hz": 2000.0,
          "pad_type": "even",
          "max_pad_samples": 1280
        },
        "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
        "fmin_hz": 65.0,
        "fmax_hz": 700.0,
        "total_frames": 153,
        "expected_voiced_frames": 96,
        "expected_unvoiced_frames": 43,
        "boundary_frames": 14,
        "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
        "valid_voiced_frames": 96,
        "missing_voiced_frames": 0,
        "false_voiced_frames": 0,
        "gross_pitch_error_frames": 0,
        "abs_error_cents_median": 0.07073535087261854,
        "abs_error_cents_p95": 0.3062103365124369,
        "voiced_detection_rate": 1.0,
        "unvoiced_false_positive_rate": 0.0,
        "score_status": "ok",
        "uncovered_tail_samples": 0
      }
    },
    {
      "case": "voiced_unvoiced_boundaries_16000",
      "method": "world_harvest",
      "operation": "gain_up6",
      "request": {
        "gain_db": 6
      },
      "status": "measured",
      "requested_samples": 25600,
      "output_samples": 25600,
      "length_error_samples": 0,
      "finite": true,
      "peak": 1.1982633633855035,
      "level_delta_db": 5.999947617305704,
      "gain_tracking_error_db": -5.238269429597153e-05,
      "relative_pitch": {
        "status": "estimated_relative_change_not_ground_truth",
        "total_frames": 153,
        "valid_pairs": 98,
        "voiced_in_base": 98,
        "voiced_in_edit": 98,
        "p95_error_cents": 0.09512457818331568
      },
      "pitch_against_known_truth": {
        "estimator": "independent-yin-difference-v2-prefiltered",
        "frame_ms": 80.0,
        "hop_ms": 10.0,
        "prefilter": {
          "kind": "butterworth-forward-backward",
          "order_per_pass": 6,
          "cutoff_hz": 2000.0,
          "pad_type": "even",
          "max_pad_samples": 1280
        },
        "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
        "fmin_hz": 65.0,
        "fmax_hz": 700.0,
        "total_frames": 153,
        "expected_voiced_frames": 96,
        "expected_unvoiced_frames": 43,
        "boundary_frames": 14,
        "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
        "valid_voiced_frames": 96,
        "missing_voiced_frames": 0,
        "false_voiced_frames": 0,
        "gross_pitch_error_frames": 0,
        "abs_error_cents_median": 0.14129592432899446,
        "abs_error_cents_p95": 0.47162817813810626,
        "voiced_detection_rate": 1.0,
        "unvoiced_false_positive_rate": 0.0,
        "score_status": "ok",
        "uncovered_tail_samples": 0
      }
    },
    {
      "case": "voiced_unvoiced_boundaries_16000",
      "method": "world_harvest",
      "operation": "gain_down6",
      "request": {
        "gain_db": -6
      },
      "status": "measured",
      "requested_samples": 25600,
      "output_samples": 25600,
      "length_error_samples": 0,
      "finite": true,
      "peak": 0.30099014838630805,
      "level_delta_db": -5.999953522767888,
      "gain_tracking_error_db": 4.647723211181898e-05,
      "relative_pitch": {
        "status": "estimated_relative_change_not_ground_truth",
        "total_frames": 153,
        "valid_pairs": 98,
        "voiced_in_base": 98,
        "voiced_in_edit": 98,
        "p95_error_cents": 0.08062221831362601
      },
      "pitch_against_known_truth": {
        "estimator": "independent-yin-difference-v2-prefiltered",
        "frame_ms": 80.0,
        "hop_ms": 10.0,
        "prefilter": {
          "kind": "butterworth-forward-backward",
          "order_per_pass": 6,
          "cutoff_hz": 2000.0,
          "pad_type": "even",
          "max_pad_samples": 1280
        },
        "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
        "fmin_hz": 65.0,
        "fmax_hz": 700.0,
        "total_frames": 153,
        "expected_voiced_frames": 96,
        "expected_unvoiced_frames": 43,
        "boundary_frames": 14,
        "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
        "valid_voiced_frames": 96,
        "missing_voiced_frames": 0,
        "false_voiced_frames": 0,
        "gross_pitch_error_frames": 0,
        "abs_error_cents_median": 0.12020384139973736,
        "abs_error_cents_p95": 0.4360248074811799,
        "voiced_detection_rate": 1.0,
        "unvoiced_false_positive_rate": 0.0,
        "score_status": "ok",
        "uncovered_tail_samples": 0
      }
    },
    {
      "case": "voiced_unvoiced_boundaries_16000",
      "method": "world_harvest",
      "operation": "time_1p25",
      "request": {
        "time_scale": 1.25
      },
      "status": "measured",
      "requested_samples": 32000,
      "output_samples": 32000,
      "length_error_samples": 0,
      "finite": true,
      "peak": 0.5786132688060052,
      "level_delta_db": -0.21764730093852921
    },
    {
      "case": "impulse_16000",
      "method": "world_dio",
      "operation": "pitch_up3",
      "request": {
        "pitch_semitones": 3
      },
      "status": "measured",
      "requested_samples": 12800,
      "output_samples": 12800,
      "length_error_samples": 0,
      "finite": true,
      "peak": 0.1812799733453587,
      "level_delta_db": 0.0,
      "relative_pitch": {
        "status": "estimated_relative_change_not_ground_truth",
        "total_frames": 73,
        "valid_pairs": 0,
        "voiced_in_base": 0,
        "voiced_in_edit": 0,
        "p95_error_cents": null
      },
      "pitch_against_known_truth": {
        "estimator": "independent-yin-difference-v2-prefiltered",
        "frame_ms": 80.0,
        "hop_ms": 10.0,
        "prefilter": {
          "kind": "butterworth-forward-backward",
          "order_per_pass": 6,
          "cutoff_hz": 2000.0,
          "pad_type": "even",
          "max_pad_samples": 1280
        },
        "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
        "fmin_hz": 65.0,
        "fmax_hz": 700.0,
        "total_frames": 73,
        "expected_voiced_frames": 0,
        "expected_unvoiced_frames": 73,
        "boundary_frames": 0,
        "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
        "valid_voiced_frames": 0,
        "missing_voiced_frames": 0,
        "false_voiced_frames": 0,
        "gross_pitch_error_frames": 0,
        "abs_error_cents_median": null,
        "abs_error_cents_p95": null,
        "voiced_detection_rate": null,
        "unvoiced_false_positive_rate": 0.0,
        "score_status": "no_valid_voiced_frames",
        "uncovered_tail_samples": 0
      },
      "event": {
        "status": "peak_energy_diagnostic",
        "expected_s": 0.3,
        "detected_s": 0.3016875,
        "error_ms": 1.6875000000000084
      }
    },
    {
      "case": "impulse_16000",
      "method": "world_dio",
      "operation": "pitch_down3",
      "request": {
        "pitch_semitones": -3
      },
      "status": "measured",
      "requested_samples": 12800,
      "output_samples": 12800,
      "length_error_samples": 0,
      "finite": true,
      "peak": 0.1812799733453587,
      "level_delta_db": 0.0,
      "relative_pitch": {
        "status": "estimated_relative_change_not_ground_truth",
        "total_frames": 73,
        "valid_pairs": 0,
        "voiced_in_base": 0,
        "voiced_in_edit": 0,
        "p95_error_cents": null
      },
      "pitch_against_known_truth": {
        "estimator": "independent-yin-difference-v2-prefiltered",
        "frame_ms": 80.0,
        "hop_ms": 10.0,
        "prefilter": {
          "kind": "butterworth-forward-backward",
          "order_per_pass": 6,
          "cutoff_hz": 2000.0,
          "pad_type": "even",
          "max_pad_samples": 1280
        },
        "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
        "fmin_hz": 65.0,
        "fmax_hz": 700.0,
        "total_frames": 73,
        "expected_voiced_frames": 0,
        "expected_unvoiced_frames": 73,
        "boundary_frames": 0,
        "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
        "valid_voiced_frames": 0,
        "missing_voiced_frames": 0,
        "false_voiced_frames": 0,
        "gross_pitch_error_frames": 0,
        "abs_error_cents_median": null,
        "abs_error_cents_p95": null,
        "voiced_detection_rate": null,
        "unvoiced_false_positive_rate": 0.0,
        "score_status": "no_valid_voiced_frames",
        "uncovered_tail_samples": 0
      },
      "event": {
        "status": "peak_energy_diagnostic",
        "expected_s": 0.3,
        "detected_s": 0.3016875,
        "error_ms": 1.6875000000000084
      }
    },
    {
      "case": "impulse_16000",
      "method": "world_dio",
      "operation": "gain_up6",
      "request": {
        "gain_db": 6
      },
      "status": "measured",
      "requested_samples": 12800,
      "output_samples": 12800,
      "length_error_samples": 0,
      "finite": true,
      "peak": 0.36170109927455735,
      "level_delta_db": 5.9999999999999964,
      "gain_tracking_error_db": -3.552713678800501e-15,
      "relative_pitch": {
        "status": "estimated_relative_change_not_ground_truth",
        "total_frames": 73,
        "valid_pairs": 0,
        "voiced_in_base": 0,
        "voiced_in_edit": 0,
        "p95_error_cents": null
      },
      "pitch_against_known_truth": {
        "estimator": "independent-yin-difference-v2-prefiltered",
        "frame_ms": 80.0,
        "hop_ms": 10.0,
        "prefilter": {
          "kind": "butterworth-forward-backward",
          "order_per_pass": 6,
          "cutoff_hz": 2000.0,
          "pad_type": "even",
          "max_pad_samples": 1280
        },
        "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
        "fmin_hz": 65.0,
        "fmax_hz": 700.0,
        "total_frames": 73,
        "expected_voiced_frames": 0,
        "expected_unvoiced_frames": 73,
        "boundary_frames": 0,
        "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
        "valid_voiced_frames": 0,
        "missing_voiced_frames": 0,
        "false_voiced_frames": 0,
        "gross_pitch_error_frames": 0,
        "abs_error_cents_median": null,
        "abs_error_cents_p95": null,
        "voiced_detection_rate": null,
        "unvoiced_false_positive_rate": 0.0,
        "score_status": "no_valid_voiced_frames",
        "uncovered_tail_samples": 0
      },
      "event": {
        "status": "peak_energy_diagnostic",
        "expected_s": 0.3,
        "detected_s": 0.3016875,
        "error_ms": 1.6875000000000084
      }
    },
    {
      "case": "impulse_16000",
      "method": "world_dio",
      "operation": "gain_down6",
      "request": {
        "gain_db": -6
      },
      "status": "measured",
      "requested_samples": 12800,
      "output_samples": 12800,
      "length_error_samples": 0,
      "finite": true,
      "peak": 0.09085520835298606,
      "level_delta_db": -5.999999999999998,
      "gain_tracking_error_db": 1.7763568394002505e-15,
      "relative_pitch": {
        "status": "estimated_relative_change_not_ground_truth",
        "total_frames": 73,
        "valid_pairs": 0,
        "voiced_in_base": 0,
        "voiced_in_edit": 0,
        "p95_error_cents": null
      },
      "pitch_against_known_truth": {
        "estimator": "independent-yin-difference-v2-prefiltered",
        "frame_ms": 80.0,
        "hop_ms": 10.0,
        "prefilter": {
          "kind": "butterworth-forward-backward",
          "order_per_pass": 6,
          "cutoff_hz": 2000.0,
          "pad_type": "even",
          "max_pad_samples": 1280
        },
        "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
        "fmin_hz": 65.0,
        "fmax_hz": 700.0,
        "total_frames": 73,
        "expected_voiced_frames": 0,
        "expected_unvoiced_frames": 73,
        "boundary_frames": 0,
        "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
        "valid_voiced_frames": 0,
        "missing_voiced_frames": 0,
        "false_voiced_frames": 0,
        "gross_pitch_error_frames": 0,
        "abs_error_cents_median": null,
        "abs_error_cents_p95": null,
        "voiced_detection_rate": null,
        "unvoiced_false_positive_rate": 0.0,
        "score_status": "no_valid_voiced_frames",
        "uncovered_tail_samples": 0
      },
      "event": {
        "status": "peak_energy_diagnostic",
        "expected_s": 0.3,
        "detected_s": 0.3016875,
        "error_ms": 1.6875000000000084
      }
    },
    {
      "case": "impulse_16000",
      "method": "world_dio",
      "operation": "time_1p25",
      "request": {
        "time_scale": 1.25
      },
      "status": "measured",
      "requested_samples": 16000,
      "output_samples": 16000,
      "length_error_samples": 0,
      "finite": true,
      "peak": 0.20096362688353142,
      "level_delta_db": -1.2207910576443026,
      "event": {
        "status": "peak_energy_diagnostic",
        "expected_s": 0.375,
        "detected_s": 0.3765,
        "error_ms": 1.5000000000000013
      }
    },
    {
      "case": "impulse_16000",
      "method": "world_harvest",
      "operation": "pitch_up3",
      "request": {
        "pitch_semitones": 3
      },
      "status": "measured",
      "requested_samples": 12800,
      "output_samples": 12800,
      "length_error_samples": 0,
      "finite": true,
      "peak": 0.1812799733453587,
      "level_delta_db": 0.0,
      "relative_pitch": {
        "status": "estimated_relative_change_not_ground_truth",
        "total_frames": 73,
        "valid_pairs": 0,
        "voiced_in_base": 0,
        "voiced_in_edit": 0,
        "p95_error_cents": null
      },
      "pitch_against_known_truth": {
        "estimator": "independent-yin-difference-v2-prefiltered",
        "frame_ms": 80.0,
        "hop_ms": 10.0,
        "prefilter": {
          "kind": "butterworth-forward-backward",
          "order_per_pass": 6,
          "cutoff_hz": 2000.0,
          "pad_type": "even",
          "max_pad_samples": 1280
        },
        "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
        "fmin_hz": 65.0,
        "fmax_hz": 700.0,
        "total_frames": 73,
        "expected_voiced_frames": 0,
        "expected_unvoiced_frames": 73,
        "boundary_frames": 0,
        "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
        "valid_voiced_frames": 0,
        "missing_voiced_frames": 0,
        "false_voiced_frames": 0,
        "gross_pitch_error_frames": 0,
        "abs_error_cents_median": null,
        "abs_error_cents_p95": null,
        "voiced_detection_rate": null,
        "unvoiced_false_positive_rate": 0.0,
        "score_status": "no_valid_voiced_frames",
        "uncovered_tail_samples": 0
      },
      "event": {
        "status": "peak_energy_diagnostic",
        "expected_s": 0.3,
        "detected_s": 0.3016875,
        "error_ms": 1.6875000000000084
      }
    },
    {
      "case": "impulse_16000",
      "method": "world_harvest",
      "operation": "pitch_down3",
      "request": {
        "pitch_semitones": -3
      },
      "status": "measured",
      "requested_samples": 12800,
      "output_samples": 12800,
      "length_error_samples": 0,
      "finite": true,
      "peak": 0.1812799733453587,
      "level_delta_db": 0.0,
      "relative_pitch": {
        "status": "estimated_relative_change_not_ground_truth",
        "total_frames": 73,
        "valid_pairs": 0,
        "voiced_in_base": 0,
        "voiced_in_edit": 0,
        "p95_error_cents": null
      },
      "pitch_against_known_truth": {
        "estimator": "independent-yin-difference-v2-prefiltered",
        "frame_ms": 80.0,
        "hop_ms": 10.0,
        "prefilter": {
          "kind": "butterworth-forward-backward",
          "order_per_pass": 6,
          "cutoff_hz": 2000.0,
          "pad_type": "even",
          "max_pad_samples": 1280
        },
        "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
        "fmin_hz": 65.0,
        "fmax_hz": 700.0,
        "total_frames": 73,
        "expected_voiced_frames": 0,
        "expected_unvoiced_frames": 73,
        "boundary_frames": 0,
        "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
        "valid_voiced_frames": 0,
        "missing_voiced_frames": 0,
        "false_voiced_frames": 0,
        "gross_pitch_error_frames": 0,
        "abs_error_cents_median": null,
        "abs_error_cents_p95": null,
        "voiced_detection_rate": null,
        "unvoiced_false_positive_rate": 0.0,
        "score_status": "no_valid_voiced_frames",
        "uncovered_tail_samples": 0
      },
      "event": {
        "status": "peak_energy_diagnostic",
        "expected_s": 0.3,
        "detected_s": 0.3016875,
        "error_ms": 1.6875000000000084
      }
    },
    {
      "case": "impulse_16000",
      "method": "world_harvest",
      "operation": "gain_up6",
      "request": {
        "gain_db": 6
      },
      "status": "measured",
      "requested_samples": 12800,
      "output_samples": 12800,
      "length_error_samples": 0,
      "finite": true,
      "peak": 0.36170109927455735,
      "level_delta_db": 5.9999999999999964,
      "gain_tracking_error_db": -3.552713678800501e-15,
      "relative_pitch": {
        "status": "estimated_relative_change_not_ground_truth",
        "total_frames": 73,
        "valid_pairs": 0,
        "voiced_in_base": 0,
        "voiced_in_edit": 0,
        "p95_error_cents": null
      },
      "pitch_against_known_truth": {
        "estimator": "independent-yin-difference-v2-prefiltered",
        "frame_ms": 80.0,
        "hop_ms": 10.0,
        "prefilter": {
          "kind": "butterworth-forward-backward",
          "order_per_pass": 6,
          "cutoff_hz": 2000.0,
          "pad_type": "even",
          "max_pad_samples": 1280
        },
        "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
        "fmin_hz": 65.0,
        "fmax_hz": 700.0,
        "total_frames": 73,
        "expected_voiced_frames": 0,
        "expected_unvoiced_frames": 73,
        "boundary_frames": 0,
        "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
        "valid_voiced_frames": 0,
        "missing_voiced_frames": 0,
        "false_voiced_frames": 0,
        "gross_pitch_error_frames": 0,
        "abs_error_cents_median": null,
        "abs_error_cents_p95": null,
        "voiced_detection_rate": null,
        "unvoiced_false_positive_rate": 0.0,
        "score_status": "no_valid_voiced_frames",
        "uncovered_tail_samples": 0
      },
      "event": {
        "status": "peak_energy_diagnostic",
        "expected_s": 0.3,
        "detected_s": 0.3016875,
        "error_ms": 1.6875000000000084
      }
    },
    {
      "case": "impulse_16000",
      "method": "world_harvest",
      "operation": "gain_down6",
      "request": {
        "gain_db": -6
      },
      "status": "measured",
      "requested_samples": 12800,
      "output_samples": 12800,
      "length_error_samples": 0,
      "finite": true,
      "peak": 0.09085520835298606,
      "level_delta_db": -5.999999999999998,
      "gain_tracking_error_db": 1.7763568394002505e-15,
      "relative_pitch": {
        "status": "estimated_relative_change_not_ground_truth",
        "total_frames": 73,
        "valid_pairs": 0,
        "voiced_in_base": 0,
        "voiced_in_edit": 0,
        "p95_error_cents": null
      },
      "pitch_against_known_truth": {
        "estimator": "independent-yin-difference-v2-prefiltered",
        "frame_ms": 80.0,
        "hop_ms": 10.0,
        "prefilter": {
          "kind": "butterworth-forward-backward",
          "order_per_pass": 6,
          "cutoff_hz": 2000.0,
          "pad_type": "even",
          "max_pad_samples": 1280
        },
        "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
        "fmin_hz": 65.0,
        "fmax_hz": 700.0,
        "total_frames": 73,
        "expected_voiced_frames": 0,
        "expected_unvoiced_frames": 73,
        "boundary_frames": 0,
        "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
        "valid_voiced_frames": 0,
        "missing_voiced_frames": 0,
        "false_voiced_frames": 0,
        "gross_pitch_error_frames": 0,
        "abs_error_cents_median": null,
        "abs_error_cents_p95": null,
        "voiced_detection_rate": null,
        "unvoiced_false_positive_rate": 0.0,
        "score_status": "no_valid_voiced_frames",
        "uncovered_tail_samples": 0
      },
      "event": {
        "status": "peak_energy_diagnostic",
        "expected_s": 0.3,
        "detected_s": 0.3016875,
        "error_ms": 1.6875000000000084
      }
    },
    {
      "case": "impulse_16000",
      "method": "world_harvest",
      "operation": "time_1p25",
      "request": {
        "time_scale": 1.25
      },
      "status": "measured",
      "requested_samples": 16000,
      "output_samples": 16000,
      "length_error_samples": 0,
      "finite": true,
      "peak": 0.20096362688353142,
      "level_delta_db": -1.2207910576443026,
      "event": {
        "status": "peak_energy_diagnostic",
        "expected_s": 0.375,
        "detected_s": 0.3765,
        "error_ms": 1.5000000000000013
      }
    },
    {
      "case": "librispeech_5142-36586_first6s",
      "method": "world_dio",
      "operation": "pitch_up3",
      "request": {
        "pitch_semitones": 3
      },
      "status": "measured",
      "requested_samples": 96000,
      "output_samples": 96000,
      "length_error_samples": 0,
      "finite": true,
      "peak": 0.532581731704532,
      "level_delta_db": -0.8279527924394158,
      "relative_pitch": {
        "status": "estimated_relative_change_not_ground_truth",
        "total_frames": 593,
        "valid_pairs": 136,
        "voiced_in_base": 139,
        "voiced_in_edit": 158,
        "p95_error_cents": 8.644412169854064
      }
    },
    {
      "case": "librispeech_5142-36586_first6s",
      "method": "world_dio",
      "operation": "pitch_down3",
      "request": {
        "pitch_semitones": -3
      },
      "status": "measured",
      "requested_samples": 96000,
      "output_samples": 96000,
      "length_error_samples": 0,
      "finite": true,
      "peak": 0.5978329658769007,
      "level_delta_db": -0.49922462746473706,
      "relative_pitch": {
        "status": "estimated_relative_change_not_ground_truth",
        "total_frames": 593,
        "valid_pairs": 108,
        "voiced_in_base": 139,
        "voiced_in_edit": 108,
        "p95_error_cents": 6.425044862116545
      }
    },
    {
      "case": "librispeech_5142-36586_first6s",
      "method": "world_dio",
      "operation": "gain_up6",
      "request": {
        "gain_db": 6
      },
      "status": "measured",
      "requested_samples": 96000,
      "output_samples": 96000,
      "length_error_samples": 0,
      "finite": true,
      "peak": 1.1625190387469722,
      "level_delta_db": 6.000003118659248,
      "gain_tracking_error_db": 3.1186592481802222e-06,
      "relative_pitch": {
        "status": "estimated_relative_change_not_ground_truth",
        "total_frames": 593,
        "valid_pairs": 139,
        "voiced_in_base": 139,
        "voiced_in_edit": 139,
        "p95_error_cents": 0.002044512334469133
      }
    },
    {
      "case": "librispeech_5142-36586_first6s",
      "method": "world_dio",
      "operation": "gain_down6",
      "request": {
        "gain_db": -6
      },
      "status": "measured",
      "requested_samples": 96000,
      "output_samples": 96000,
      "length_error_samples": 0,
      "finite": true,
      "peak": 0.2920850330824141,
      "level_delta_db": -6.000005430224973,
      "gain_tracking_error_db": -5.430224972791109e-06,
      "relative_pitch": {
        "status": "estimated_relative_change_not_ground_truth",
        "total_frames": 593,
        "valid_pairs": 139,
        "voiced_in_base": 139,
        "voiced_in_edit": 139,
        "p95_error_cents": 0.005272840438552846
      }
    },
    {
      "case": "librispeech_5142-36586_first6s",
      "method": "world_dio",
      "operation": "time_1p25",
      "request": {
        "time_scale": 1.25
      },
      "status": "measured",
      "requested_samples": 120000,
      "output_samples": 120000,
      "length_error_samples": 0,
      "finite": true,
      "peak": 0.5829133467694386,
      "level_delta_db": -0.03662774686861628
    },
    {
      "case": "librispeech_5142-36586_first6s",
      "method": "world_harvest",
      "operation": "pitch_up3",
      "request": {
        "pitch_semitones": 3
      },
      "status": "measured",
      "requested_samples": 96000,
      "output_samples": 96000,
      "length_error_samples": 0,
      "finite": true,
      "peak": 0.4994962140314667,
      "level_delta_db": -0.8443977611548581,
      "relative_pitch": {
        "status": "estimated_relative_change_not_ground_truth",
        "total_frames": 593,
        "valid_pairs": 144,
        "voiced_in_base": 152,
        "voiced_in_edit": 165,
        "p95_error_cents": 7.098644421654109
      }
    },
    {
      "case": "librispeech_5142-36586_first6s",
      "method": "world_harvest",
      "operation": "pitch_down3",
      "request": {
        "pitch_semitones": -3
      },
      "status": "measured",
      "requested_samples": 96000,
      "output_samples": 96000,
      "length_error_samples": 0,
      "finite": true,
      "peak": 0.6537961929202944,
      "level_delta_db": -0.5232104742972093,
      "relative_pitch": {
        "status": "estimated_relative_change_not_ground_truth",
        "total_frames": 593,
        "valid_pairs": 112,
        "voiced_in_base": 152,
        "voiced_in_edit": 112,
        "p95_error_cents": 6.716929840730213
      }
    },
    {
      "case": "librispeech_5142-36586_first6s",
      "method": "world_harvest",
      "operation": "gain_up6",
      "request": {
        "gain_db": 6
      },
      "status": "measured",
      "requested_samples": 96000,
      "output_samples": 96000,
      "length_error_samples": 0,
      "finite": true,
      "peak": 1.154407190940396,
      "level_delta_db": 6.000004549350465,
      "gain_tracking_error_db": 4.549350465232749e-06,
      "relative_pitch": {
        "status": "estimated_relative_change_not_ground_truth",
        "total_frames": 593,
        "valid_pairs": 152,
        "voiced_in_base": 152,
        "voiced_in_edit": 152,
        "p95_error_cents": 0.0023373121132768664
      }
    },
    {
      "case": "librispeech_5142-36586_first6s",
      "method": "world_harvest",
      "operation": "gain_down6",
      "request": {
        "gain_db": -6
      },
      "status": "measured",
      "requested_samples": 96000,
      "output_samples": 96000,
      "length_error_samples": 0,
      "finite": true,
      "peak": 0.2900666230679788,
      "level_delta_db": -6.000015379044004,
      "gain_tracking_error_db": -1.5379044003616116e-05,
      "relative_pitch": {
        "status": "estimated_relative_change_not_ground_truth",
        "total_frames": 593,
        "valid_pairs": 152,
        "voiced_in_base": 152,
        "voiced_in_edit": 152,
        "p95_error_cents": 0.00773186168530517
      }
    },
    {
      "case": "librispeech_5142-36586_first6s",
      "method": "world_harvest",
      "operation": "time_1p25",
      "request": {
        "time_scale": 1.25
      },
      "status": "measured",
      "requested_samples": 120000,
      "output_samples": 120000,
      "length_error_samples": 0,
      "finite": true,
      "peak": 0.6129852954460985,
      "level_delta_db": -0.04016249093160265
    },
    {
      "case": "librispeech_7021-79759_first6s",
      "method": "world_dio",
      "operation": "pitch_up3",
      "request": {
        "pitch_semitones": 3
      },
      "status": "measured",
      "requested_samples": 96000,
      "output_samples": 96000,
      "length_error_samples": 0,
      "finite": true,
      "peak": 0.4774919303315494,
      "level_delta_db": -0.81052018082801,
      "relative_pitch": {
        "status": "estimated_relative_change_not_ground_truth",
        "total_frames": 593,
        "valid_pairs": 113,
        "voiced_in_base": 114,
        "voiced_in_edit": 133,
        "p95_error_cents": 17.065169985518757
      }
    },
    {
      "case": "librispeech_7021-79759_first6s",
      "method": "world_dio",
      "operation": "pitch_down3",
      "request": {
        "pitch_semitones": -3
      },
      "status": "measured",
      "requested_samples": 96000,
      "output_samples": 96000,
      "length_error_samples": 0,
      "finite": true,
      "peak": 0.6032897835953626,
      "level_delta_db": -0.3400827591370178,
      "relative_pitch": {
        "status": "estimated_relative_change_not_ground_truth",
        "total_frames": 593,
        "valid_pairs": 90,
        "voiced_in_base": 114,
        "voiced_in_edit": 91,
        "p95_error_cents": 10.661418291444228
      }
    },
    {
      "case": "librispeech_7021-79759_first6s",
      "method": "world_dio",
      "operation": "gain_up6",
      "request": {
        "gain_db": 6
      },
      "status": "measured",
      "requested_samples": 96000,
      "output_samples": 96000,
      "length_error_samples": 0,
      "finite": true,
      "peak": 1.3232347048403867,
      "level_delta_db": 6.000002298120633,
      "gain_tracking_error_db": 2.298120633348333e-06,
      "relative_pitch": {
        "status": "estimated_relative_change_not_ground_truth",
        "total_frames": 593,
        "valid_pairs": 114,
        "voiced_in_base": 114,
        "voiced_in_edit": 114,
        "p95_error_cents": 0.0012920947062639433
      }
    },
    {
      "case": "librispeech_7021-79759_first6s",
      "method": "world_dio",
      "operation": "gain_down6",
      "request": {
        "gain_db": -6
      },
      "status": "measured",
      "requested_samples": 96000,
      "output_samples": 96000,
      "length_error_samples": 0,
      "finite": true,
      "peak": 0.3323933333645478,
      "level_delta_db": -6.000002238858279,
      "gain_tracking_error_db": -2.2388582792132183e-06,
      "relative_pitch": {
        "status": "estimated_relative_change_not_ground_truth",
        "total_frames": 593,
        "valid_pairs": 114,
        "voiced_in_base": 114,
        "voiced_in_edit": 114,
        "p95_error_cents": 0.003960633541560481
      }
    },
    {
      "case": "librispeech_7021-79759_first6s",
      "method": "world_dio",
      "operation": "time_1p25",
      "request": {
        "time_scale": 1.25
      },
      "status": "measured",
      "requested_samples": 120000,
      "output_samples": 120000,
      "length_error_samples": 0,
      "finite": true,
      "peak": 0.6700283856277153,
      "level_delta_db": -0.0161109942912333
    },
    {
      "case": "librispeech_7021-79759_first6s",
      "method": "world_harvest",
      "operation": "pitch_up3",
      "request": {
        "pitch_semitones": 3
      },
      "status": "measured",
      "requested_samples": 96000,
      "output_samples": 96000,
      "length_error_samples": 0,
      "finite": true,
      "peak": 0.4668307396420468,
      "level_delta_db": -0.8330365486225608,
      "relative_pitch": {
        "status": "estimated_relative_change_not_ground_truth",
        "total_frames": 593,
        "valid_pairs": 119,
        "voiced_in_base": 119,
        "voiced_in_edit": 142,
        "p95_error_cents": 16.123690587510016
      }
    },
    {
      "case": "librispeech_7021-79759_first6s",
      "method": "world_harvest",
      "operation": "pitch_down3",
      "request": {
        "pitch_semitones": -3
      },
      "status": "measured",
      "requested_samples": 96000,
      "output_samples": 96000,
      "length_error_samples": 0,
      "finite": true,
      "peak": 0.6010588295743018,
      "level_delta_db": -0.3691165617867467,
      "relative_pitch": {
        "status": "estimated_relative_change_not_ground_truth",
        "total_frames": 593,
        "valid_pairs": 96,
        "voiced_in_base": 119,
        "voiced_in_edit": 96,
        "p95_error_cents": 10.2746451065276
      }
    },
    {
      "case": "librispeech_7021-79759_first6s",
      "method": "world_harvest",
      "operation": "gain_up6",
      "request": {
        "gain_db": 6
      },
      "status": "measured",
      "requested_samples": 96000,
      "output_samples": 96000,
      "length_error_samples": 0,
      "finite": true,
      "peak": 1.3209498482253577,
      "level_delta_db": 6.000001354501865,
      "gain_tracking_error_db": 1.354501865336033e-06,
      "relative_pitch": {
        "status": "estimated_relative_change_not_ground_truth",
        "total_frames": 593,
        "valid_pairs": 119,
        "voiced_in_base": 119,
        "voiced_in_edit": 119,
        "p95_error_cents": 0.0026267904092307395
      }
    },
    {
      "case": "librispeech_7021-79759_first6s",
      "method": "world_harvest",
      "operation": "gain_down6",
      "request": {
        "gain_db": -6
      },
      "status": "measured",
      "requested_samples": 96000,
      "output_samples": 96000,
      "length_error_samples": 0,
      "finite": true,
      "peak": 0.331809168508887,
      "level_delta_db": -6.000001456992109,
      "gain_tracking_error_db": -1.4569921091833749e-06,
      "relative_pitch": {
        "status": "estimated_relative_change_not_ground_truth",
        "total_frames": 593,
        "valid_pairs": 119,
        "voiced_in_base": 119,
        "voiced_in_edit": 119,
        "p95_error_cents": 0.007589880089579693
      }
    },
    {
      "case": "librispeech_7021-79759_first6s",
      "method": "world_harvest",
      "operation": "time_1p25",
      "request": {
        "time_scale": 1.25
      },
      "status": "measured",
      "requested_samples": 120000,
      "output_samples": 120000,
      "length_error_samples": 0,
      "finite": true,
      "peak": 0.6642830941695148,
      "level_delta_db": -0.045115578999813395
    }
  ],
  "decoder_only": [
    {
      "f0_hz": 0.0,
      "sample_rate": 16000,
      "status": "measured",
      "output_samples": 8000,
      "finite": true,
      "pitch": {
        "estimator": "independent-yin-difference-v2-prefiltered",
        "frame_ms": 80.0,
        "hop_ms": 10.0,
        "prefilter": {
          "kind": "butterworth-forward-backward",
          "order_per_pass": 6,
          "cutoff_hz": 2000.0,
          "pad_type": "even",
          "max_pad_samples": 1280
        },
        "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
        "fmin_hz": 65.0,
        "fmax_hz": 700.0,
        "total_frames": 43,
        "expected_voiced_frames": 0,
        "expected_unvoiced_frames": 43,
        "boundary_frames": 0,
        "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
        "valid_voiced_frames": 0,
        "missing_voiced_frames": 0,
        "false_voiced_frames": 0,
        "gross_pitch_error_frames": 0,
        "abs_error_cents_median": null,
        "abs_error_cents_p95": null,
        "voiced_detection_rate": null,
        "unvoiced_false_positive_rate": 0.0,
        "score_status": "no_valid_voiced_frames",
        "uncovered_tail_samples": 0
      }
    },
    {
      "f0_hz": 140.0,
      "sample_rate": 16000,
      "status": "measured",
      "output_samples": 8000,
      "finite": true,
      "pitch": {
        "estimator": "independent-yin-difference-v2-prefiltered",
        "frame_ms": 80.0,
        "hop_ms": 10.0,
        "prefilter": {
          "kind": "butterworth-forward-backward",
          "order_per_pass": 6,
          "cutoff_hz": 2000.0,
          "pad_type": "even",
          "max_pad_samples": 1280
        },
        "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
        "fmin_hz": 65.0,
        "fmax_hz": 700.0,
        "total_frames": 43,
        "expected_voiced_frames": 43,
        "expected_unvoiced_frames": 0,
        "boundary_frames": 0,
        "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
        "valid_voiced_frames": 43,
        "missing_voiced_frames": 0,
        "false_voiced_frames": 0,
        "gross_pitch_error_frames": 0,
        "abs_error_cents_median": 0.11770727118258656,
        "abs_error_cents_p95": 0.19839938546532165,
        "voiced_detection_rate": 1.0,
        "unvoiced_false_positive_rate": null,
        "score_status": "ok",
        "uncovered_tail_samples": 0
      }
    }
  ],
  "calibration": [
    {
      "case": "sine_120_16000",
      "measurement": {
        "status": "ok",
        "reference_samples": 19200,
        "output_samples": 19200,
        "length_delta_samples": 0,
        "sample_rate": 16000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 80,
            "hop_samples": 20,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 3.941806022385313e-06
          },
          {
            "window_ms": 20,
            "window_samples": 320,
            "hop_samples": 80,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 2.26182902261729e-06
          },
          {
            "window_ms": 80,
            "window_samples": 1280,
            "hop_samples": 320,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 2.2525420327375667e-06
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.1223989132529024,
              "output_power": 0.1223989132529024,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 4.3525748203288054e-08,
              "output_power": 4.3525748203288054e-08,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 1.2759237148214641e-11,
              "output_power": 1.2759237148214641e-11,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 2.003048030212706e-13,
              "output_power": 2.003048030212706e-13,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 5.051440946447032e-15,
              "output_power": 5.051440946447032e-15,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 1.2503175028988497e-16,
              "output_power": 1.2503175028988497e-16,
              "delta_db": 0.0,
              "reference_active": false
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 1,
          "band_count": 6,
          "active_band_mae_db": 0.0,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.0,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1280
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 113,
          "expected_voiced_frames": 113,
          "expected_unvoiced_frames": 0,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 113,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": 0.030131128750209936,
          "abs_error_cents_p95": 0.03237711093418589,
          "voiced_detection_rate": 1.0,
          "unvoiced_false_positive_rate": null,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -9.122222836739189,
        "output_peak": 0.5,
        "reference_rms_dbfs": -9.122222836739189,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 0.0
      }
    },
    {
      "case": "harmonic_110_16000",
      "measurement": {
        "status": "ok",
        "reference_samples": 19200,
        "output_samples": 19200,
        "length_delta_samples": 0,
        "sample_rate": 16000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 80,
            "hop_samples": 20,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 2.976044629480609e-06
          },
          {
            "window_ms": 20,
            "window_samples": 320,
            "hop_samples": 80,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.5995360552283572e-06
          },
          {
            "window_ms": 80,
            "window_samples": 1280,
            "hop_samples": 320,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.5800497103667606e-06
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.05147918597288733,
              "output_power": 0.05147918597288733,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.012842494613159137,
              "output_power": 0.012842494613159137,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.00199891954710928,
              "output_power": 0.00199891954710928,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.0005740401624226474,
              "output_power": 0.0005740401624226474,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.0002000693024622835,
              "output_power": 0.0002000693024622835,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 4.8188345938719944e-05,
              "output_power": 4.8188345938719944e-05,
              "delta_db": 0.0,
              "reference_active": true
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 6,
          "band_count": 6,
          "active_band_mae_db": 0.0,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.0,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1280
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 113,
          "expected_voiced_frames": 113,
          "expected_unvoiced_frames": 0,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 113,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": 0.024150079212343203,
          "abs_error_cents_p95": 0.02530063271103916,
          "voiced_detection_rate": 1.0,
          "unvoiced_false_positive_rate": null,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -11.729999181681606,
        "output_peak": 0.6,
        "reference_rms_dbfs": -11.729999181681606,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 0.0
      }
    },
    {
      "case": "harmonic_220_16000",
      "measurement": {
        "status": "ok",
        "reference_samples": 19200,
        "output_samples": 19200,
        "length_delta_samples": 0,
        "sample_rate": 16000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 80,
            "hop_samples": 20,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.8831011704983265e-06
          },
          {
            "window_ms": 20,
            "window_samples": 320,
            "hop_samples": 80,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.4861423760000773e-06
          },
          {
            "window_ms": 80,
            "window_samples": 1280,
            "hop_samples": 320,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.4842442020779748e-06
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 5.49916784158012e-05,
              "output_power": 5.49916784158012e-05,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.061855119859678724,
              "output_power": 0.061855119859678724,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.004500346924411444,
              "output_power": 0.004500346924411444,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.0020644179058127428,
              "output_power": 0.0020644179058127428,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.0005925150620932784,
              "output_power": 0.0005925150620932784,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 0.00014632183659341974,
              "output_power": 0.00014632183659341974,
              "delta_db": 0.0,
              "reference_active": true
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 6,
          "band_count": 6,
          "active_band_mae_db": 0.0,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.0,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1280
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 113,
          "expected_voiced_frames": 113,
          "expected_unvoiced_frames": 0,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 113,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": 0.06874692594848918,
          "abs_error_cents_p95": 0.07365278710174623,
          "voiced_detection_rate": 1.0,
          "unvoiced_false_positive_rate": null,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -11.598078505409127,
        "output_peak": 0.6,
        "reference_rms_dbfs": -11.598078505409127,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 0.0
      }
    },
    {
      "case": "missing_fundamental_150_16000",
      "measurement": {
        "status": "ok",
        "reference_samples": 19200,
        "output_samples": 19200,
        "length_delta_samples": 0,
        "sample_rate": 16000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 80,
            "hop_samples": 20,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.6784924591140252e-06
          },
          {
            "window_ms": 20,
            "window_samples": 320,
            "hop_samples": 80,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 9.594546200812243e-07
          },
          {
            "window_ms": 80,
            "window_samples": 1280,
            "hop_samples": 320,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 9.594546200811852e-07
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 2.061915115378003e-09,
              "output_power": 2.061915115378003e-09,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.026039993468199775,
              "output_power": 0.026039993468199775,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.009394429724971783,
              "output_power": 0.009394429724971783,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.005733143649652568,
              "output_power": 0.005733143649652568,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.0006884043848610362,
              "output_power": 0.0006884043848610362,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 1.7542304123327258e-15,
              "output_power": 1.7542304123327258e-15,
              "delta_db": 0.0,
              "reference_active": false
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 4,
          "band_count": 6,
          "active_band_mae_db": 0.0,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.0,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1280
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 113,
          "expected_voiced_frames": 113,
          "expected_unvoiced_frames": 0,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 113,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": 0.04531963559402408,
          "abs_error_cents_p95": 0.1094055094280233,
          "voiced_detection_rate": 1.0,
          "unvoiced_false_positive_rate": null,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -13.7824255483687,
        "output_peak": 0.6,
        "reference_rms_dbfs": -13.7824255483687,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 0.0
      }
    },
    {
      "case": "harmonic_sweep_90_240_16000",
      "measurement": {
        "status": "ok",
        "reference_samples": 24000,
        "output_samples": 24000,
        "length_delta_samples": 0,
        "sample_rate": 16000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 80,
            "hop_samples": 20,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 3.554055357778171e-06
          },
          {
            "window_ms": 20,
            "window_samples": 320,
            "hop_samples": 80,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.813555167305629e-06
          },
          {
            "window_ms": 80,
            "window_samples": 1280,
            "hop_samples": 320,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.781870414968393e-06
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.04239313445922007,
              "output_power": 0.04239313445922007,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.031065774522381732,
              "output_power": 0.031065774522381732,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.003072858618483715,
              "output_power": 0.003072858618483715,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.000991118137064746,
              "output_power": 0.000991118137064746,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.00024487906219671575,
              "output_power": 0.00024487906219671575,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 1.1357525507446691e-05,
              "output_power": 1.1357525507446691e-05,
              "delta_db": 0.0,
              "reference_active": true
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 6,
          "band_count": 6,
          "active_band_mae_db": 0.0,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.0,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1280
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 143,
          "expected_voiced_frames": 143,
          "expected_unvoiced_frames": 0,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 143,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": 0.7523859558975469,
          "abs_error_cents_p95": 3.117145006558854,
          "voiced_detection_rate": 1.0,
          "unvoiced_false_positive_rate": null,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -11.091369618265535,
        "output_peak": 0.6,
        "reference_rms_dbfs": -11.091369618265535,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 0.0
      }
    },
    {
      "case": "pulse_iir_vowel_90_16000",
      "measurement": {
        "status": "ok",
        "reference_samples": 19200,
        "output_samples": 19200,
        "length_delta_samples": 0,
        "sample_rate": 16000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 80,
            "hop_samples": 20,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.5440384220059523e-06
          },
          {
            "window_ms": 20,
            "window_samples": 320,
            "hop_samples": 80,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 7.568043564410838e-07
          },
          {
            "window_ms": 80,
            "window_samples": 1280,
            "hop_samples": 320,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 6.608045419880063e-07
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.0002523438933289186,
              "output_power": 0.0002523438933289186,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.0008649859170864208,
              "output_power": 0.0008649859170864208,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.01922676647982728,
              "output_power": 0.01922676647982728,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.0054264652782323,
              "output_power": 0.0054264652782323,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 2.7309008718690025e-05,
              "output_power": 2.7309008718690025e-05,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 7.940988985707968e-10,
              "output_power": 7.940988985707968e-10,
              "delta_db": 0.0,
              "reference_active": false
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 5,
          "band_count": 6,
          "active_band_mae_db": 0.0,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.0,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1280
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 113,
          "expected_voiced_frames": 113,
          "expected_unvoiced_frames": 0,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 113,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": 0.1281628933713823,
          "abs_error_cents_p95": 0.27157533602911393,
          "voiced_detection_rate": 1.0,
          "unvoiced_false_positive_rate": null,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -15.88416126976294,
        "output_peak": 0.5996924672494939,
        "reference_rms_dbfs": -15.88416126976294,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 0.0
      }
    },
    {
      "case": "am_noise_6hz_16000",
      "measurement": {
        "status": "ok",
        "reference_samples": 24000,
        "output_samples": 24000,
        "length_delta_samples": 0,
        "sample_rate": 16000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 80,
            "hop_samples": 20,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 7.196453952249548e-07
          },
          {
            "window_ms": 20,
            "window_samples": 320,
            "hop_samples": 80,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 3.3844778753114973e-07
          },
          {
            "window_ms": 80,
            "window_samples": 1280,
            "hop_samples": 320,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.660282693918681e-07
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 1.7660251205809936e-06,
              "output_power": 1.7660251205809936e-06,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.00033661167637180005,
              "output_power": 0.00033661167637180005,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.0009012477313791158,
              "output_power": 0.0009012477313791158,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.001683090652131809,
              "output_power": 0.001683090652131809,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.0034291918023174467,
              "output_power": 0.0034291918023174467,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 0.0034051290715845775,
              "output_power": 0.0034051290715845775,
              "delta_db": 0.0,
              "reference_active": true
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 6,
          "band_count": 6,
          "active_band_mae_db": 0.0,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.0,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1280
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 143,
          "expected_voiced_frames": 0,
          "expected_unvoiced_frames": 143,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 0,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": null,
          "abs_error_cents_p95": null,
          "voiced_detection_rate": null,
          "unvoiced_false_positive_rate": 0.0,
          "score_status": "no_valid_voiced_frames",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -20.10682049932848,
        "output_peak": 0.6,
        "reference_rms_dbfs": -20.10682049932848,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 0.0
      }
    },
    {
      "case": "voiced_unvoiced_boundaries_16000",
      "measurement": {
        "status": "ok",
        "reference_samples": 25600,
        "output_samples": 25600,
        "length_delta_samples": 0,
        "sample_rate": 16000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 80,
            "hop_samples": 20,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.1356494948447747e-06
          },
          {
            "window_ms": 20,
            "window_samples": 320,
            "hop_samples": 80,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 8.004148315506265e-07
          },
          {
            "window_ms": 80,
            "window_samples": 1280,
            "hop_samples": 320,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 7.980781269652513e-07
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.010527047873563372,
              "output_power": 0.010527047873563372,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.001819280533181824,
              "output_power": 0.001819280533181824,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.0015803116136899817,
              "output_power": 0.0015803116136899817,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.0016111355972958136,
              "output_power": 0.0016111355972958136,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.002553265304867968,
              "output_power": 0.002553265304867968,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 0.0022722881628369244,
              "output_power": 0.0022722881628369244,
              "delta_db": 0.0,
              "reference_active": true
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 6,
          "band_count": 6,
          "active_band_mae_db": 0.0,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.0,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1280
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 153,
          "expected_voiced_frames": 96,
          "expected_unvoiced_frames": 43,
          "boundary_frames": 14,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 96,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": 0.11526563854894027,
          "abs_error_cents_p95": 0.11667414067294324,
          "voiced_detection_rate": 1.0,
          "unvoiced_false_positive_rate": 0.0,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -16.911512201837546,
        "output_peak": 0.6,
        "reference_rms_dbfs": -16.911512201837546,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 0.0
      }
    },
    {
      "case": "silence_16000",
      "measurement": {
        "status": "ok",
        "reference_samples": 12800,
        "output_samples": 12800,
        "length_delta_samples": 0,
        "sample_rate": 16000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 80,
            "hop_samples": 20,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": null,
            "spectral_convergence_status": "zero_reference_energy",
            "amplitude_floor": 1e-10
          },
          {
            "window_ms": 20,
            "window_samples": 320,
            "hop_samples": 80,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": null,
            "spectral_convergence_status": "zero_reference_energy",
            "amplitude_floor": 1e-10
          },
          {
            "window_ms": 80,
            "window_samples": 1280,
            "hop_samples": 320,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": null,
            "spectral_convergence_status": "zero_reference_energy",
            "amplitude_floor": 1e-10
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.0,
              "output_power": 0.0,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.0,
              "output_power": 0.0,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.0,
              "output_power": 0.0,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.0,
              "output_power": 0.0,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.0,
              "output_power": 0.0,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 0.0,
              "output_power": 0.0,
              "delta_db": 0.0,
              "reference_active": false
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 0,
          "band_count": 6,
          "active_band_mae_db": null,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "no_active_reference_bands"
        },
        "rms_gain_error_db": null,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1280
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 73,
          "expected_voiced_frames": 0,
          "expected_unvoiced_frames": 73,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 0,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": null,
          "abs_error_cents_p95": null,
          "voiced_detection_rate": null,
          "unvoiced_false_positive_rate": 0.0,
          "score_status": "no_valid_voiced_frames",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -120.0,
        "output_peak": 0.0,
        "reference_rms_dbfs": -120.0,
        "rms_gain_status": "zero_reference_energy",
        "mr_stft_log_magnitude_mae_db": 0.0
      }
    },
    {
      "case": "impulse_16000",
      "measurement": {
        "status": "ok",
        "reference_samples": 12800,
        "output_samples": 12800,
        "length_delta_samples": 0,
        "sample_rate": 16000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 80,
            "hop_samples": 20,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.2500000000000002e-07
          },
          {
            "window_ms": 20,
            "window_samples": 320,
            "hop_samples": 80,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 3.1250000000000005e-08
          },
          {
            "window_ms": 80,
            "window_samples": 1280,
            "hop_samples": 320,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 7.812500000000001e-09
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 4.8675537109375e-07,
              "output_power": 4.8675537109375e-07,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 7.324218750000001e-07,
              "output_power": 7.324218750000001e-07,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 1.2207031250000002e-06,
              "output_power": 1.2207031250000002e-06,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 2.4414062500000005e-06,
              "output_power": 2.4414062500000005e-06,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 4.882812500000001e-06,
              "output_power": 4.882812500000001e-06,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 9.767150878906252e-06,
              "output_power": 9.767150878906252e-06,
              "delta_db": 0.0,
              "reference_active": true
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 6,
          "band_count": 6,
          "active_band_mae_db": 0.0,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.0,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1280
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 73,
          "expected_voiced_frames": 0,
          "expected_unvoiced_frames": 73,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 0,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": null,
          "abs_error_cents_p95": null,
          "voiced_detection_rate": null,
          "unvoiced_false_positive_rate": 0.0,
          "score_status": "no_valid_voiced_frames",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -47.092699609758306,
        "output_peak": 0.5,
        "reference_rms_dbfs": -47.092699609758306,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 0.0
      }
    },
    {
      "case": "sine_120_24000",
      "measurement": {
        "status": "ok",
        "reference_samples": 28800,
        "output_samples": 28800,
        "length_delta_samples": 0,
        "sample_rate": 24000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 120,
            "hop_samples": 30,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 3.941805906784142e-06
          },
          {
            "window_ms": 20,
            "window_samples": 480,
            "hop_samples": 120,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 2.261829024122929e-06
          },
          {
            "window_ms": 80,
            "window_samples": 1920,
            "hop_samples": 480,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 2.2525420327602955e-06
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.1223983612665257,
              "output_power": 0.1223983612665257,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 4.368160051241552e-08,
              "output_power": 4.368160051241552e-08,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 1.2623987216046109e-11,
              "output_power": 1.2623987216046109e-11,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 1.9568859245163652e-13,
              "output_power": 1.9568859245163652e-13,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 4.937000892258482e-15,
              "output_power": 4.937000892258482e-15,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 1.415789296131094e-16,
              "output_power": 1.415789296131094e-16,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 8000.0,
              "high_hz": 12000.0,
              "reference_power": 2.279383746168836e-18,
              "output_power": 2.279383746168836e-18,
              "delta_db": 0.0,
              "reference_active": false
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 1,
          "band_count": 7,
          "active_band_mae_db": 0.0,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.0,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1920
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 113,
          "expected_voiced_frames": 113,
          "expected_unvoiced_frames": 0,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 113,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": 0.019681260388214012,
          "abs_error_cents_p95": 0.02114872971441477,
          "voiced_detection_rate": 1.0,
          "unvoiced_false_positive_rate": null,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -9.122242416771481,
        "output_peak": 0.5,
        "reference_rms_dbfs": -9.122242416771481,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 0.0
      }
    },
    {
      "case": "harmonic_110_24000",
      "measurement": {
        "status": "ok",
        "reference_samples": 28800,
        "output_samples": 28800,
        "length_delta_samples": 0,
        "sample_rate": 24000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 120,
            "hop_samples": 30,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 2.9760446201103816e-06
          },
          {
            "window_ms": 20,
            "window_samples": 480,
            "hop_samples": 120,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.5995360553994829e-06
          },
          {
            "window_ms": 80,
            "window_samples": 1920,
            "hop_samples": 480,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.5800497103829576e-06
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.05147895748194521,
              "output_power": 0.05147895748194521,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.012842424267491583,
              "output_power": 0.012842424267491583,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.0019989077283542756,
              "output_power": 0.0019989077283542756,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.0005740371316749717,
              "output_power": 0.0005740371316749717,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.00020006846273392878,
              "output_power": 0.00020006846273392878,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 4.818816215187489e-05,
              "output_power": 4.818816215187489e-05,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 8000.0,
              "high_hz": 12000.0,
              "reference_power": 6.9343892095099854e-18,
              "output_power": 6.9343892095099854e-18,
              "delta_db": 0.0,
              "reference_active": false
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 6,
          "band_count": 7,
          "active_band_mae_db": 0.0,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.0,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1920
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 113,
          "expected_voiced_frames": 113,
          "expected_unvoiced_frames": 0,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 113,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": 0.02097575259089096,
          "abs_error_cents_p95": 0.02194761027132793,
          "voiced_detection_rate": 1.0,
          "unvoiced_false_positive_rate": null,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -11.730019537814442,
        "output_peak": 0.6,
        "reference_rms_dbfs": -11.730019537814442,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 0.0
      }
    },
    {
      "case": "harmonic_220_24000",
      "measurement": {
        "status": "ok",
        "reference_samples": 28800,
        "output_samples": 28800,
        "length_delta_samples": 0,
        "sample_rate": 24000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 120,
            "hop_samples": 30,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.8829075025078097e-06
          },
          {
            "window_ms": 20,
            "window_samples": 480,
            "hop_samples": 120,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.4859895249142301e-06
          },
          {
            "window_ms": 80,
            "window_samples": 1920,
            "hop_samples": 480,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.4840915451321505e-06
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 5.491151368241255e-05,
              "output_power": 5.491151368241255e-05,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.061842179029333574,
              "output_power": 0.061842179029333574,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.0044993993032403385,
              "output_power": 0.0044993993032403385,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.0020639838015985745,
              "output_power": 0.0020639838015985745,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.0005923905147946086,
              "output_power": 0.0005923905147946086,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 0.00014629106162114991,
              "output_power": 0.00014629106162114991,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 8000.0,
              "high_hz": 12000.0,
              "reference_power": 2.135938879727136e-18,
              "output_power": 2.135938879727136e-18,
              "delta_db": 0.0,
              "reference_active": false
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 6,
          "band_count": 7,
          "active_band_mae_db": 0.0,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.0,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1920
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 113,
          "expected_voiced_frames": 113,
          "expected_unvoiced_frames": 0,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 113,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": 0.0755472727480109,
          "abs_error_cents_p95": 0.07789108206093558,
          "voiced_detection_rate": 1.0,
          "unvoiced_false_positive_rate": null,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -11.598992073304835,
        "output_peak": 0.6,
        "reference_rms_dbfs": -11.598992073304835,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 0.0
      }
    },
    {
      "case": "missing_fundamental_150_24000",
      "measurement": {
        "status": "ok",
        "reference_samples": 28800,
        "output_samples": 28800,
        "length_delta_samples": 0,
        "sample_rate": 24000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 120,
            "hop_samples": 30,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.6789106478412106e-06
          },
          {
            "window_ms": 20,
            "window_samples": 480,
            "hop_samples": 120,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 9.59693716728409e-07
          },
          {
            "window_ms": 80,
            "window_samples": 1920,
            "hop_samples": 480,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 9.59693716728388e-07
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 2.0390810256231928e-09,
              "output_power": 2.0390810256231928e-09,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.026052876569692504,
              "output_power": 0.026052876569692504,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.00939908553778103,
              "output_power": 0.00939908553778103,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.005735985755836545,
              "output_power": 0.005735985755836545,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.0006887453396994243,
              "output_power": 0.0006887453396994243,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 1.42139458684016e-15,
              "output_power": 1.42139458684016e-15,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 8000.0,
              "high_hz": 12000.0,
              "reference_power": 1.550662980281035e-17,
              "output_power": 1.550662980281035e-17,
              "delta_db": 0.0,
              "reference_active": false
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 4,
          "band_count": 7,
          "active_band_mae_db": 0.0,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.0,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1920
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 113,
          "expected_voiced_frames": 113,
          "expected_unvoiced_frames": 0,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 113,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": 0.03345571045785979,
          "abs_error_cents_p95": 0.03345571045978181,
          "voiced_detection_rate": 1.0,
          "unvoiced_false_positive_rate": null,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -13.78027598596679,
        "output_peak": 0.6,
        "reference_rms_dbfs": -13.78027598596679,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 0.0
      }
    },
    {
      "case": "harmonic_sweep_90_240_24000",
      "measurement": {
        "status": "ok",
        "reference_samples": 36000,
        "output_samples": 36000,
        "length_delta_samples": 0,
        "sample_rate": 24000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 120,
            "hop_samples": 30,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 3.55320470668471e-06
          },
          {
            "window_ms": 20,
            "window_samples": 480,
            "hop_samples": 120,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.8136621563529383e-06
          },
          {
            "window_ms": 80,
            "window_samples": 1920,
            "hop_samples": 480,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.7818710827781096e-06
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.04239361340416796,
              "output_power": 0.04239361340416796,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.03106500151487297,
              "output_power": 0.03106500151487297,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.0030728431524343755,
              "output_power": 0.0030728431524343755,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.000991105398187423,
              "output_power": 0.000991105398187423,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.00024487204538874196,
              "output_power": 0.00024487204538874196,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 1.135676467453045e-05,
              "output_power": 1.135676467453045e-05,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 8000.0,
              "high_hz": 12000.0,
              "reference_power": 3.2406827864853453e-18,
              "output_power": 3.2406827864853453e-18,
              "delta_db": 0.0,
              "reference_active": false
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 6,
          "band_count": 7,
          "active_band_mae_db": 0.0,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.0,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1920
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 143,
          "expected_voiced_frames": 143,
          "expected_unvoiced_frames": 0,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 143,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": 0.7517397795693007,
          "abs_error_cents_p95": 3.078310669659668,
          "voiced_detection_rate": 1.0,
          "unvoiced_false_positive_rate": null,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -11.091388047000379,
        "output_peak": 0.6,
        "reference_rms_dbfs": -11.091388047000379,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 0.0
      }
    },
    {
      "case": "pulse_iir_vowel_90_24000",
      "measurement": {
        "status": "ok",
        "reference_samples": 28800,
        "output_samples": 28800,
        "length_delta_samples": 0,
        "sample_rate": 24000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 120,
            "hop_samples": 30,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.5469380564580222e-06
          },
          {
            "window_ms": 20,
            "window_samples": 480,
            "hop_samples": 120,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 7.554453537804852e-07
          },
          {
            "window_ms": 80,
            "window_samples": 1920,
            "hop_samples": 480,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 6.593378972549988e-07
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.000253091636230152,
              "output_power": 0.000253091636230152,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.0008666933732315855,
              "output_power": 0.0008666933732315855,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.01924727343304346,
              "output_power": 0.01924727343304346,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.005429834188185286,
              "output_power": 0.005429834188185286,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 2.6911704595528546e-05,
              "output_power": 2.6911704595528546e-05,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 7.567305096100016e-10,
              "output_power": 7.567305096100016e-10,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 8000.0,
              "high_hz": 12000.0,
              "reference_power": 1.9946245986022405e-13,
              "output_power": 1.9946245986022405e-13,
              "delta_db": 0.0,
              "reference_active": false
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 5,
          "band_count": 7,
          "active_band_mae_db": 0.0,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.0,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1920
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 113,
          "expected_voiced_frames": 113,
          "expected_unvoiced_frames": 0,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 113,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": 0.01313539760686003,
          "abs_error_cents_p95": 0.08804423520154184,
          "voiced_detection_rate": 1.0,
          "unvoiced_false_positive_rate": null,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -15.879797648272351,
        "output_peak": 0.6,
        "reference_rms_dbfs": -15.879797648272351,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 0.0
      }
    },
    {
      "case": "am_noise_6hz_24000",
      "measurement": {
        "status": "ok",
        "reference_samples": 36000,
        "output_samples": 36000,
        "length_delta_samples": 0,
        "sample_rate": 24000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 120,
            "hop_samples": 30,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 7.631656165540323e-07
          },
          {
            "window_ms": 20,
            "window_samples": 480,
            "hop_samples": 120,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 3.5855187109493593e-07
          },
          {
            "window_ms": 80,
            "window_samples": 1920,
            "hop_samples": 480,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 2.0674113225451663e-07
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 1.1631862164563455e-06,
              "output_power": 1.1631862164563455e-06,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.0003336513722501128,
              "output_power": 0.0003336513722501128,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.000950264796862024,
              "output_power": 0.000950264796862024,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.0018267199561446922,
              "output_power": 0.0018267199561446922,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.003672192455577471,
              "output_power": 0.003672192455577471,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 0.0038056228070004667,
              "output_power": 0.0038056228070004667,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 8000.0,
              "high_hz": 12000.0,
              "reference_power": 6.833598729632565e-06,
              "output_power": 6.833598729632565e-06,
              "delta_db": 0.0,
              "reference_active": true
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 7,
          "band_count": 7,
          "active_band_mae_db": 0.0,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.0,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1920
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 143,
          "expected_voiced_frames": 0,
          "expected_unvoiced_frames": 143,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 0,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": null,
          "abs_error_cents_p95": null,
          "voiced_detection_rate": null,
          "unvoiced_false_positive_rate": 0.0,
          "score_status": "no_valid_voiced_frames",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -19.748396816649617,
        "output_peak": 0.6,
        "reference_rms_dbfs": -19.748396816649617,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 0.0
      }
    },
    {
      "case": "voiced_unvoiced_boundaries_24000",
      "measurement": {
        "status": "ok",
        "reference_samples": 38400,
        "output_samples": 38400,
        "length_delta_samples": 0,
        "sample_rate": 24000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 120,
            "hop_samples": 30,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.4829081495669723e-06
          },
          {
            "window_ms": 20,
            "window_samples": 480,
            "hop_samples": 120,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.0451655225896614e-06
          },
          {
            "window_ms": 80,
            "window_samples": 1920,
            "hop_samples": 480,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.0421143003023435e-06
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.017949668611672003,
              "output_power": 0.017949668611672003,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.00305335715464887,
              "output_power": 0.00305335715464887,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.0023364217946556785,
              "output_power": 0.0023364217946556785,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.0018669016013489377,
              "output_power": 0.0018669016013489377,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.0027969227390688516,
              "output_power": 0.0027969227390688516,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 0.0029185612082491936,
              "output_power": 0.0029185612082491936,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 8000.0,
              "high_hz": 12000.0,
              "reference_power": 1.956235821234014e-05,
              "output_power": 1.956235821234014e-05,
              "delta_db": 0.0,
              "reference_active": true
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 7,
          "band_count": 7,
          "active_band_mae_db": 0.0,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.0,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1920
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 153,
          "expected_voiced_frames": 96,
          "expected_unvoiced_frames": 43,
          "boundary_frames": 14,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 96,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": 0.04836619574829707,
          "abs_error_cents_p95": 0.048414803844663595,
          "voiced_detection_rate": 1.0,
          "unvoiced_false_positive_rate": 0.0,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -15.094601033605402,
        "output_peak": 0.6,
        "reference_rms_dbfs": -15.094601033605402,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 0.0
      }
    },
    {
      "case": "silence_24000",
      "measurement": {
        "status": "ok",
        "reference_samples": 19200,
        "output_samples": 19200,
        "length_delta_samples": 0,
        "sample_rate": 24000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 120,
            "hop_samples": 30,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": null,
            "spectral_convergence_status": "zero_reference_energy",
            "amplitude_floor": 1e-10
          },
          {
            "window_ms": 20,
            "window_samples": 480,
            "hop_samples": 120,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": null,
            "spectral_convergence_status": "zero_reference_energy",
            "amplitude_floor": 1e-10
          },
          {
            "window_ms": 80,
            "window_samples": 1920,
            "hop_samples": 480,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": null,
            "spectral_convergence_status": "zero_reference_energy",
            "amplitude_floor": 1e-10
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.0,
              "output_power": 0.0,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.0,
              "output_power": 0.0,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.0,
              "output_power": 0.0,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.0,
              "output_power": 0.0,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.0,
              "output_power": 0.0,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 0.0,
              "output_power": 0.0,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 8000.0,
              "high_hz": 12000.0,
              "reference_power": 0.0,
              "output_power": 0.0,
              "delta_db": 0.0,
              "reference_active": false
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 0,
          "band_count": 7,
          "active_band_mae_db": null,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "no_active_reference_bands"
        },
        "rms_gain_error_db": null,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1920
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 73,
          "expected_voiced_frames": 0,
          "expected_unvoiced_frames": 73,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 0,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": null,
          "abs_error_cents_p95": null,
          "voiced_detection_rate": null,
          "unvoiced_false_positive_rate": 0.0,
          "score_status": "no_valid_voiced_frames",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -120.0,
        "output_peak": 0.0,
        "reference_rms_dbfs": -120.0,
        "rms_gain_status": "zero_reference_energy",
        "mr_stft_log_magnitude_mae_db": 0.0
      }
    },
    {
      "case": "impulse_24000",
      "measurement": {
        "status": "ok",
        "reference_samples": 19200,
        "output_samples": 19200,
        "length_delta_samples": 0,
        "sample_rate": 24000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 120,
            "hop_samples": 30,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 8.333333333333335e-08
          },
          {
            "window_ms": 20,
            "window_samples": 480,
            "hop_samples": 120,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 2.0833333333333338e-08
          },
          {
            "window_ms": 80,
            "window_samples": 1920,
            "hop_samples": 480,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 5.2083333333333345e-09
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 2.1633572048611113e-07,
              "output_power": 2.1633572048611113e-07,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 3.2552083333333327e-07,
              "output_power": 3.2552083333333327e-07,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 5.425347222222223e-07,
              "output_power": 5.425347222222223e-07,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 1.0850694444444447e-06,
              "output_power": 1.0850694444444447e-06,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 2.1701388888888893e-06,
              "output_power": 2.1701388888888893e-06,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 4.340277777777779e-06,
              "output_power": 4.340277777777779e-06,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 8000.0,
              "high_hz": 12000.0,
              "reference_power": 4.340955946180557e-06,
              "output_power": 4.340955946180557e-06,
              "delta_db": 0.0,
              "reference_active": true
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 7,
          "band_count": 7,
          "active_band_mae_db": 0.0,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.0,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 1920
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 73,
          "expected_voiced_frames": 0,
          "expected_unvoiced_frames": 73,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 0,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": null,
          "abs_error_cents_p95": null,
          "voiced_detection_rate": null,
          "unvoiced_false_positive_rate": 0.0,
          "score_status": "no_valid_voiced_frames",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -48.85361220031512,
        "output_peak": 0.5,
        "reference_rms_dbfs": -48.85361220031512,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 0.0
      }
    },
    {
      "case": "sine_120_48000",
      "measurement": {
        "status": "ok",
        "reference_samples": 57600,
        "output_samples": 57600,
        "length_delta_samples": 0,
        "sample_rate": 48000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 240,
            "hop_samples": 60,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 3.941805880114473e-06
          },
          {
            "window_ms": 20,
            "window_samples": 960,
            "hop_samples": 240,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 2.2618290244702303e-06
          },
          {
            "window_ms": 80,
            "window_samples": 3840,
            "hop_samples": 960,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 2.252542032765538e-06
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.12239780857734177,
              "output_power": 0.12239780857734177,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 4.3839185584805135e-08,
              "output_power": 4.3839185584805135e-08,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 1.2501389969226049e-11,
              "output_power": 1.2501389969226049e-11,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 1.9138815548273091e-13,
              "output_power": 1.9138815548273091e-13,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 4.8072606896262115e-15,
              "output_power": 4.8072606896262115e-15,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 1.413952508919099e-16,
              "output_power": 1.413952508919099e-16,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 8000.0,
              "high_hz": 16000.0,
              "reference_power": 4.225800834967686e-18,
              "output_power": 4.225800834967686e-18,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 16000.0,
              "high_hz": 24000.0,
              "reference_power": 6.810009625368615e-20,
              "output_power": 6.810009625368615e-20,
              "delta_db": 0.0,
              "reference_active": false
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 1,
          "band_count": 8,
          "active_band_mae_db": 0.0,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.0,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 3840
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 113,
          "expected_voiced_frames": 113,
          "expected_unvoiced_frames": 0,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 113,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": 0.0049288302617261194,
          "abs_error_cents_p95": 0.005288276413549499,
          "voiced_detection_rate": 1.0,
          "unvoiced_false_positive_rate": null,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -9.122262021767263,
        "output_peak": 0.5,
        "reference_rms_dbfs": -9.122262021767263,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 0.0
      }
    },
    {
      "case": "harmonic_110_48000",
      "measurement": {
        "status": "ok",
        "reference_samples": 57600,
        "output_samples": 57600,
        "length_delta_samples": 0,
        "sample_rate": 48000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 240,
            "hop_samples": 60,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 2.976031976226823e-06
          },
          {
            "window_ms": 20,
            "window_samples": 960,
            "hop_samples": 240,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.5995292608606799e-06
          },
          {
            "window_ms": 80,
            "window_samples": 3840,
            "hop_samples": 960,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.5800429985876247e-06
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.051478291260778665,
              "output_power": 0.051478291260778665,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.01284224448528195,
              "output_power": 0.01284224448528195,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.0019988789077755287,
              "output_power": 0.0019988789077755287,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.000574029237132317,
              "output_power": 0.000574029237132317,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.00020006592032709576,
              "output_power": 0.00020006592032709576,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 4.818756876905675e-05,
              "output_power": 4.818756876905675e-05,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 8000.0,
              "high_hz": 16000.0,
              "reference_power": 1.18414332675984e-17,
              "output_power": 1.18414332675984e-17,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 16000.0,
              "high_hz": 24000.0,
              "reference_power": 1.9747985191787345e-19,
              "output_power": 1.9747985191787345e-19,
              "delta_db": 0.0,
              "reference_active": false
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 6,
          "band_count": 8,
          "active_band_mae_db": 0.0,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.0,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 3840
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 113,
          "expected_voiced_frames": 113,
          "expected_unvoiced_frames": 0,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 113,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": 0.0033589365806560682,
          "abs_error_cents_p95": 0.0035056793480827135,
          "voiced_detection_rate": 1.0,
          "unvoiced_false_positive_rate": null,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -11.730076837392167,
        "output_peak": 0.6,
        "reference_rms_dbfs": -11.730076837392167,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 0.0
      }
    },
    {
      "case": "harmonic_220_48000",
      "measurement": {
        "status": "ok",
        "reference_samples": 57600,
        "output_samples": 57600,
        "length_delta_samples": 0,
        "sample_rate": 48000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 240,
            "hop_samples": 60,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.8828945713001331e-06
          },
          {
            "window_ms": 20,
            "window_samples": 960,
            "hop_samples": 240,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.4859793167314665e-06
          },
          {
            "window_ms": 80,
            "window_samples": 3840,
            "hop_samples": 960,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.4840813497420889e-06
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 5.4841924970992106e-05,
              "output_power": 5.4841924970992106e-05,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.061841111531313796,
              "output_power": 0.061841111531313796,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.004499315567952621,
              "output_power": 0.004499315567952621,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.002063945986683421,
              "output_power": 0.002063945986683421,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.0005923797075262987,
              "output_power": 0.0005923797075262987,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 0.00014628837300187047,
              "output_power": 0.00014628837300187047,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 8000.0,
              "high_hz": 16000.0,
              "reference_power": 1.4627755375778767e-18,
              "output_power": 1.4627755375778767e-18,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 16000.0,
              "high_hz": 24000.0,
              "reference_power": 5.18330972539492e-20,
              "output_power": 5.18330972539492e-20,
              "delta_db": 0.0,
              "reference_active": false
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 6,
          "band_count": 8,
          "active_band_mae_db": 0.0,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.0,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 3840
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 113,
          "expected_voiced_frames": 113,
          "expected_unvoiced_frames": 0,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 113,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": 0.017461330431862,
          "abs_error_cents_p95": 0.017960775383457236,
          "voiced_detection_rate": 1.0,
          "unvoiced_false_positive_rate": null,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -11.599071913201911,
        "output_peak": 0.6,
        "reference_rms_dbfs": -11.599071913201911,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 0.0
      }
    },
    {
      "case": "missing_fundamental_150_48000",
      "measurement": {
        "status": "ok",
        "reference_samples": 57600,
        "output_samples": 57600,
        "length_delta_samples": 0,
        "sample_rate": 48000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 240,
            "hop_samples": 60,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.6784923452864682e-06
          },
          {
            "window_ms": 20,
            "window_samples": 960,
            "hop_samples": 240,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 9.594546200811072e-07
          },
          {
            "window_ms": 80,
            "window_samples": 3840,
            "hop_samples": 960,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 9.594546200810943e-07
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 2.013947075921961e-09,
              "output_power": 2.013947075921961e-09,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.026039799719722992,
              "output_power": 0.026039799719722992,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.009394375763728136,
              "output_power": 0.009394375763728136,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.005733112306803246,
              "output_power": 0.005733112306803246,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.0006884000038671073,
              "output_power": 0.0006884000038671073,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 1.2347614644895594e-15,
              "output_power": 1.2347614644895594e-15,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 8000.0,
              "high_hz": 16000.0,
              "reference_power": 1.3212581182706175e-17,
              "output_power": 1.3212581182706175e-17,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 16000.0,
              "high_hz": 24000.0,
              "reference_power": 2.673896070224589e-19,
              "output_power": 2.673896070224589e-19,
              "delta_db": 0.0,
              "reference_active": false
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 4,
          "band_count": 8,
          "active_band_mae_db": 0.0,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.0,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 3840
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 113,
          "expected_voiced_frames": 113,
          "expected_unvoiced_frames": 0,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 113,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": 0.008408297691095995,
          "abs_error_cents_p95": 0.008408297692249224,
          "voiced_detection_rate": 1.0,
          "unvoiced_false_positive_rate": null,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -13.782454962302342,
        "output_peak": 0.6,
        "reference_rms_dbfs": -13.782454962302342,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 0.0
      }
    },
    {
      "case": "harmonic_sweep_90_240_48000",
      "measurement": {
        "status": "ok",
        "reference_samples": 72000,
        "output_samples": 72000,
        "length_delta_samples": 0,
        "sample_rate": 48000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 240,
            "hop_samples": 60,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 3.55150508956732e-06
          },
          {
            "window_ms": 20,
            "window_samples": 960,
            "hop_samples": 240,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.8137636805643976e-06
          },
          {
            "window_ms": 80,
            "window_samples": 3840,
            "hop_samples": 960,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.7818726325739977e-06
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.04239413506753674,
              "output_power": 0.04239413506753674,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.031064259628998756,
              "output_power": 0.031064259628998756,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.003072830805318983,
              "output_power": 0.003072830805318983,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.0009910936221402817,
              "output_power": 0.0009910936221402817,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.00024486526471175564,
              "output_power": 0.00024486526471175564,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 1.1356011487650316e-05,
              "output_power": 1.1356011487650316e-05,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 8000.0,
              "high_hz": 16000.0,
              "reference_power": 6.167684438722045e-18,
              "output_power": 6.167684438722045e-18,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 16000.0,
              "high_hz": 24000.0,
              "reference_power": 7.92407301634303e-20,
              "output_power": 7.92407301634303e-20,
              "delta_db": 0.0,
              "reference_active": false
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 6,
          "band_count": 8,
          "active_band_mae_db": 0.0,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.0,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 3840
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 143,
          "expected_voiced_frames": 143,
          "expected_unvoiced_frames": 0,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 143,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": 0.7520633299271753,
          "abs_error_cents_p95": 3.0660937295776733,
          "voiced_detection_rate": 1.0,
          "unvoiced_false_positive_rate": null,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -11.091402111254231,
        "output_peak": 0.6,
        "reference_rms_dbfs": -11.091402111254231,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 0.0
      }
    },
    {
      "case": "pulse_iir_vowel_90_48000",
      "measurement": {
        "status": "ok",
        "reference_samples": 57600,
        "output_samples": 57600,
        "length_delta_samples": 0,
        "sample_rate": 48000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 240,
            "hop_samples": 60,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.544388643952995e-06
          },
          {
            "window_ms": 20,
            "window_samples": 960,
            "hop_samples": 240,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 7.568597472259627e-07
          },
          {
            "window_ms": 80,
            "window_samples": 3840,
            "hop_samples": 960,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 6.58148002312151e-07
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.00025319912849527503,
              "output_power": 0.00025319912849527503,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.0008665060581519603,
              "output_power": 0.0008665060581519603,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.01922144503644029,
              "output_power": 0.01922144503644029,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.005413878634268725,
              "output_power": 0.005413878634268725,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 2.673915483767176e-05,
              "output_power": 2.673915483767176e-05,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 7.338857218233313e-10,
              "output_power": 7.338857218233313e-10,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 8000.0,
              "high_hz": 16000.0,
              "reference_power": 1.797749457826996e-13,
              "output_power": 1.797749457826996e-13,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 16000.0,
              "high_hz": 24000.0,
              "reference_power": 7.994683551270167e-17,
              "output_power": 7.994683551270167e-17,
              "delta_db": 0.0,
              "reference_active": false
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 5,
          "band_count": 8,
          "active_band_mae_db": 0.0,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.0,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 3840
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 113,
          "expected_voiced_frames": 113,
          "expected_unvoiced_frames": 0,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 113,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": 0.005687022073118816,
          "abs_error_cents_p95": 0.05414171206447127,
          "voiced_detection_rate": 1.0,
          "unvoiced_false_positive_rate": null,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -15.8868729138951,
        "output_peak": 0.5996395620462861,
        "reference_rms_dbfs": -15.8868729138951,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 0.0
      }
    },
    {
      "case": "am_noise_6hz_48000",
      "measurement": {
        "status": "ok",
        "reference_samples": 72000,
        "output_samples": 72000,
        "length_delta_samples": 0,
        "sample_rate": 48000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 240,
            "hop_samples": 60,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 6.552902439330402e-07
          },
          {
            "window_ms": 20,
            "window_samples": 960,
            "hop_samples": 240,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 3.42738569490461e-07
          },
          {
            "window_ms": 80,
            "window_samples": 3840,
            "hop_samples": 960,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.5353408899322663e-07
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 8.871501047754418e-07,
              "output_power": 8.871501047754418e-07,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.0002722044085115042,
              "output_power": 0.0002722044085115042,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.0006828458443453354,
              "output_power": 0.0006828458443453354,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.0013396582156900432,
              "output_power": 0.0013396582156900432,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.0027292042373384708,
              "output_power": 0.0027292042373384708,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 0.002855527574868151,
              "output_power": 0.002855527574868151,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 8000.0,
              "high_hz": 16000.0,
              "reference_power": 6.61838156225461e-05,
              "output_power": 6.61838156225461e-05,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 16000.0,
              "high_hz": 24000.0,
              "reference_power": 7.9884632100967e-09,
              "output_power": 7.9884632100967e-09,
              "delta_db": 0.0,
              "reference_active": true
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 8,
          "band_count": 8,
          "active_band_mae_db": 0.0,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.0,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 3840
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 143,
          "expected_voiced_frames": 0,
          "expected_unvoiced_frames": 143,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 0,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": null,
          "abs_error_cents_p95": null,
          "voiced_detection_rate": null,
          "unvoiced_false_positive_rate": 0.0,
          "score_status": "no_valid_voiced_frames",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -20.99823061039579,
        "output_peak": 0.6,
        "reference_rms_dbfs": -20.99823061039579,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 0.0
      }
    },
    {
      "case": "voiced_unvoiced_boundaries_48000",
      "measurement": {
        "status": "ok",
        "reference_samples": 76800,
        "output_samples": 76800,
        "length_delta_samples": 0,
        "sample_rate": 48000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 240,
            "hop_samples": 60,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.9324218569546794e-06
          },
          {
            "window_ms": 20,
            "window_samples": 960,
            "hop_samples": 240,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.3619863838507488e-06
          },
          {
            "window_ms": 80,
            "window_samples": 3840,
            "hop_samples": 960,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.3580102448380447e-06
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.03047380309215163,
              "output_power": 0.03047380309215163,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.005157709327867115,
              "output_power": 0.005157709327867115,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.00353875006812259,
              "output_power": 0.00353875006812259,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.002029762060050069,
              "output_power": 0.002029762060050069,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.002606577366861781,
              "output_power": 0.002606577366861781,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 0.0024034467397108395,
              "output_power": 0.0024034467397108395,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 8000.0,
              "high_hz": 16000.0,
              "reference_power": 0.00013061289319707598,
              "output_power": 0.00013061289319707598,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 16000.0,
              "high_hz": 24000.0,
              "reference_power": 1.5360693858317516e-07,
              "output_power": 1.5360693858317516e-07,
              "delta_db": 0.0,
              "reference_active": true
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 8,
          "band_count": 8,
          "active_band_mae_db": 0.0,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.0,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 3840
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 153,
          "expected_voiced_frames": 96,
          "expected_unvoiced_frames": 43,
          "boundary_frames": 14,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 96,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": 0.008094127872799416,
          "abs_error_cents_p95": 0.008103680851882001,
          "voiced_detection_rate": 1.0,
          "unvoiced_false_positive_rate": 0.0,
          "score_status": "ok",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -13.340363310518448,
        "output_peak": 0.6,
        "reference_rms_dbfs": -13.340363310518448,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 0.0
      }
    },
    {
      "case": "silence_48000",
      "measurement": {
        "status": "ok",
        "reference_samples": 38400,
        "output_samples": 38400,
        "length_delta_samples": 0,
        "sample_rate": 48000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 240,
            "hop_samples": 60,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": null,
            "spectral_convergence_status": "zero_reference_energy",
            "amplitude_floor": 1e-10
          },
          {
            "window_ms": 20,
            "window_samples": 960,
            "hop_samples": 240,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": null,
            "spectral_convergence_status": "zero_reference_energy",
            "amplitude_floor": 1e-10
          },
          {
            "window_ms": 80,
            "window_samples": 3840,
            "hop_samples": 960,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": null,
            "spectral_convergence_status": "zero_reference_energy",
            "amplitude_floor": 1e-10
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.0,
              "output_power": 0.0,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.0,
              "output_power": 0.0,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.0,
              "output_power": 0.0,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.0,
              "output_power": 0.0,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.0,
              "output_power": 0.0,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 0.0,
              "output_power": 0.0,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 8000.0,
              "high_hz": 16000.0,
              "reference_power": 0.0,
              "output_power": 0.0,
              "delta_db": 0.0,
              "reference_active": false
            },
            {
              "low_hz": 16000.0,
              "high_hz": 24000.0,
              "reference_power": 0.0,
              "output_power": 0.0,
              "delta_db": 0.0,
              "reference_active": false
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 0,
          "band_count": 8,
          "active_band_mae_db": null,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "no_active_reference_bands"
        },
        "rms_gain_error_db": null,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 3840
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 73,
          "expected_voiced_frames": 0,
          "expected_unvoiced_frames": 73,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 0,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": null,
          "abs_error_cents_p95": null,
          "voiced_detection_rate": null,
          "unvoiced_false_positive_rate": 0.0,
          "score_status": "no_valid_voiced_frames",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -120.0,
        "output_peak": 0.0,
        "reference_rms_dbfs": -120.0,
        "rms_gain_status": "zero_reference_energy",
        "mr_stft_log_magnitude_mae_db": 0.0
      }
    },
    {
      "case": "impulse_48000",
      "measurement": {
        "status": "ok",
        "reference_samples": 38400,
        "output_samples": 38400,
        "length_delta_samples": 0,
        "sample_rate": 48000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 240,
            "hop_samples": 60,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 4.1666666666666676e-08
          },
          {
            "window_ms": 20,
            "window_samples": 960,
            "hop_samples": 240,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.0416666666666669e-08
          },
          {
            "window_ms": 80,
            "window_samples": 3840,
            "hop_samples": 960,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 2.6041666666666672e-09
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 5.408393012152778e-08,
              "output_power": 5.408393012152778e-08,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 8.138020833333332e-08,
              "output_power": 8.138020833333332e-08,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 1.3563368055555558e-07,
              "output_power": 1.3563368055555558e-07,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 2.7126736111111116e-07,
              "output_power": 2.7126736111111116e-07,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 5.425347222222223e-07,
              "output_power": 5.425347222222223e-07,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 1.0850694444444447e-06,
              "output_power": 1.0850694444444447e-06,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 8000.0,
              "high_hz": 16000.0,
              "reference_power": 2.1701388888888893e-06,
              "output_power": 2.1701388888888893e-06,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 16000.0,
              "high_hz": 24000.0,
              "reference_power": 2.170308430989584e-06,
              "output_power": 2.170308430989584e-06,
              "delta_db": 0.0,
              "reference_active": true
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 8,
          "band_count": 8,
          "active_band_mae_db": 0.0,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.0,
        "pitch": {
          "estimator": "independent-yin-difference-v2-prefiltered",
          "frame_ms": 80.0,
          "hop_ms": 10.0,
          "prefilter": {
            "kind": "butterworth-forward-backward",
            "order_per_pass": 6,
            "cutoff_hz": 2000.0,
            "pad_type": "even",
            "max_pad_samples": 3840
          },
          "validated_scope": "independent synthetic calibration; requires sufficient periodic energy below 2 kHz; not validated for natural speech",
          "fmin_hz": 65.0,
          "fmax_hz": 700.0,
          "total_frames": 73,
          "expected_voiced_frames": 0,
          "expected_unvoiced_frames": 73,
          "boundary_frames": 0,
          "boundary_policy": "mixed-truth windows counted but excluded from cent and UV summaries",
          "valid_voiced_frames": 0,
          "missing_voiced_frames": 0,
          "false_voiced_frames": 0,
          "gross_pitch_error_frames": 0,
          "abs_error_cents_median": null,
          "abs_error_cents_p95": null,
          "voiced_detection_rate": null,
          "unvoiced_false_positive_rate": 0.0,
          "score_status": "no_valid_voiced_frames",
          "uncovered_tail_samples": 0
        },
        "output_rms_dbfs": -51.86391215695493,
        "output_peak": 0.5,
        "reference_rms_dbfs": -51.86391215695493,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 0.0
      }
    },
    {
      "case": "librispeech_5142-36586_first6s",
      "measurement": {
        "status": "ok",
        "reference_samples": 96000,
        "output_samples": 96000,
        "length_delta_samples": 0,
        "sample_rate": 16000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 80,
            "hop_samples": 20,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 9.142335289882602e-07
          },
          {
            "window_ms": 20,
            "window_samples": 320,
            "hop_samples": 80,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 6.848824211945687e-07
          },
          {
            "window_ms": 80,
            "window_samples": 1280,
            "hop_samples": 320,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 4.856831169332098e-07
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.0001524928320973097,
              "output_power": 0.0001524928320973097,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.000614847570631693,
              "output_power": 0.000614847570631693,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.0006546222632577629,
              "output_power": 0.0006546222632577629,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.00045735665465447865,
              "output_power": 0.00045735665465447865,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 0.0005074094182988508,
              "output_power": 0.0005074094182988508,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 0.0001454970054415293,
              "output_power": 0.0001454970054415293,
              "delta_db": 0.0,
              "reference_active": true
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 6,
          "band_count": 6,
          "active_band_mae_db": 0.0,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.0,
        "pitch": null,
        "output_rms_dbfs": -25.964975801834793,
        "output_peak": 0.3843994140625,
        "reference_rms_dbfs": -25.964975801834793,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 0.0
      }
    },
    {
      "case": "librispeech_7021-79759_first6s",
      "measurement": {
        "status": "ok",
        "reference_samples": 96000,
        "output_samples": 96000,
        "length_delta_samples": 0,
        "sample_rate": 16000,
        "reference_finite": true,
        "output_finite": true,
        "alignment": "none",
        "gain_normalization": "none",
        "mr_stft": [
          {
            "window_ms": 5,
            "window_samples": 80,
            "hop_samples": 20,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.917174240126096e-06
          },
          {
            "window_ms": 20,
            "window_samples": 320,
            "hop_samples": 80,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 1.3764120923669142e-06
          },
          {
            "window_ms": 80,
            "window_samples": 1280,
            "hop_samples": 320,
            "log_magnitude_mae_db": 0.0,
            "spectral_convergence": 0.0,
            "spectral_convergence_status": "ok",
            "amplitude_floor": 9.65726411302904e-07
          }
        ],
        "band_energy": {
          "bands": [
            {
              "low_hz": 0.0,
              "high_hz": 200.0,
              "reference_power": 0.0016535338650408523,
              "output_power": 0.0016535338650408523,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 200.0,
              "high_hz": 500.0,
              "reference_power": 0.0014061361443478543,
              "output_power": 0.0014061361443478543,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 500.0,
              "high_hz": 1000.0,
              "reference_power": 0.00023886716309266744,
              "output_power": 0.00023886716309266744,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 1000.0,
              "high_hz": 2000.0,
              "reference_power": 0.00017008225892163728,
              "output_power": 0.00017008225892163728,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 2000.0,
              "high_hz": 4000.0,
              "reference_power": 5.1305941766241635e-05,
              "output_power": 5.1305941766241635e-05,
              "delta_db": 0.0,
              "reference_active": true
            },
            {
              "low_hz": 4000.0,
              "high_hz": 8000.0,
              "reference_power": 2.4673803234657673e-05,
              "output_power": 2.4673803234657673e-05,
              "delta_db": 0.0,
              "reference_active": true
            }
          ],
          "power_floor": 1e-12,
          "active_band_count": 6,
          "band_count": 6,
          "active_band_mae_db": 0.0,
          "active_policy": "reference power > max(1e-12, total reference power * 1e-6)",
          "status": "ok"
        },
        "rms_gain_error_db": 0.0,
        "pitch": null,
        "output_rms_dbfs": -24.504328677638092,
        "output_peak": 0.61859130859375,
        "reference_rms_dbfs": -24.504328677638092,
        "rms_gain_status": "ok",
        "mr_stft_log_magnitude_mae_db": 0.0
      }
    }
  ],
  "unsupported_operations": [
    {
      "method": "llsm_world_dio",
      "operations": [
        "pitch",
        "gain",
        "time"
      ],
      "reason": "layer0 resynthesis adapter only; not implemented in this comparison"
    }
  ],
  "native_builds": {
    "world": {
      "revision": "c794856b537758a3d300757db2e5e31685a822c2",
      "lock_sha256": "44b8bc3adb62802ed060834d9e06ed7f5f3cc4d28583b8a44066c5959a42462b",
      "compiler": "g++",
      "compiler_version": "g++ (Ubuntu 13.3.0-6ubuntu2~24.04) 13.3.0",
      "flags": [
        "-std=c++11",
        "-O2",
        "-fPIC",
        "-shared"
      ],
      "library_sha256": "01aa04d0c3fec82c2bf4a00e3417e00d77caff8ac8078a4b8ec5b611b081b86d",
      "source_sha256": {
        "src/world/cheaptrick.h": "90acc1f7cbb692cccee2467ebe1c9d5499d92deaad7fd3c04416edf29f6c261d",
        "src/world/codec.h": "529736e308dd168ed60bd1dd76059ea8e04697de9d36c019dd9abccac22283a0",
        "src/world/common.h": "7a761e7d92a3dff74141f73a0bb36ea7af543f314638e4d53be21dfd3d6924d1",
        "src/world/constantnumbers.h": "ed3d3aec8d0e019db68b3845198bb2c87eedd1cd26a694a830bd57f4d26ba323",
        "src/world/d4c.h": "c736bb57d4b07ed74d8a56fb8302b6de0d5b21d4b5845fe115293aff9b71b55f",
        "src/world/dio.h": "e5a433f4454250f9e3a9c60dc40de65caea0cb26ad4073b87c739773a22d1ddd",
        "src/world/fft.h": "ac321b81dea5e8118933ecc66d2d9cbfb7721da52892a64d8a4f2e18a65829d6",
        "src/world/harvest.h": "1ab55206a28236b96e8bdd0f18ddd0ec45ad874217b876ab4a9a2699619e3de2",
        "src/world/macrodefinitions.h": "6d5417f864a4a4d95b470e72e3cb0114e8c96ba33cc189341e83a9f345e664f0",
        "src/world/matlabfunctions.h": "192a6be8cf749c147a7b5119b14ad50c5ddbddba9d6c810fbdf64f0dd7dc2af4",
        "src/world/stonemask.h": "e98a951d7443b81ed0062434a6656efd812011beb57a94c0492c13471698a7fc",
        "src/world/synthesis.h": "3905ef8d0f77a4d3081a3ec11cc81f61e0c0b8db42ce37db1d6a76d5a5096e44",
        "src/world/synthesisrealtime.h": "a0f21ec940cc6e692ef6e4cdce6e920c79ae3faff605bb5816ef19686dc60739",
        "src/cheaptrick.cpp": "6481ea68ebc3a90151852cea8a2efbf1bf6683e823b737847ce57a69f7cbe00b",
        "src/codec.cpp": "acbd6c22763d036ac338fee82c061e8526fdd2d68006fb4e73d4c58c9842b9e2",
        "src/common.cpp": "ef4a982d103bfd4c0efe6f1e6fa1192809e07ac39289f29951f3d95f1af8ca51",
        "src/d4c.cpp": "a988f6154b5c3332a17f2153a1e32afb04e798d57fa99ed08670c6a64e0ad28a",
        "src/dio.cpp": "38449de8a16c6ac6405b7289ed2e8adac9400885d53d181639ebd063366756da",
        "src/fft.cpp": "7a580cc02a0b040bf39de9a841f18b527a711093309ef408c08271abed6eec62",
        "src/harvest.cpp": "e9e80047a9d9ed3ff8521b966985c0b912ac09415565da1cc821319dc454975e",
        "src/matlabfunctions.cpp": "250d4cdc31b64cb3bda3a0c988d3853a09e66dd85f15f167161948d938662a4c",
        "src/stonemask.cpp": "de68ab826ff94176bfa89b5caf7ba46a6a0497eaaf1957e2e942245b7b663e76",
        "src/synthesis.cpp": "9888973e28f2194a0eb9807e18e36680f3d912bef3ddf174dc640fedc4e08b4c",
        "src/synthesisrealtime.cpp": "01403f641a1dce3de564335859b82815162bdee2ae7e25b5fa2288930539f5f2",
        "LICENSE.txt": "6921ef0a65a931509b4055075fd847d7257c4094609075dd0615e8e997215f7e"
      }
    },
    "llsm": {
      "dependencies": [
        {
          "name": "libllsm2",
          "url": "https://github.com/Sleepwalking/libllsm2.git",
          "commit": "d18cdf02b31819670e3bc23ead933ad9467da06d",
          "license": "GPL-3.0-or-later",
          "license_file": "LICENSE"
        },
        {
          "name": "ciglet",
          "url": "https://github.com/Sleepwalking/ciglet.git",
          "commit": "895ba9b1c0eabee83d3544208bbc82420efa3206",
          "license": "BSD-3-Clause core, see source headers for bundled dependencies",
          "license_file": "ciglet.h"
        }
      ],
      "compiler": "cc (Ubuntu 13.3.0-6ubuntu2~24.04) 13.3.0",
      "library_sha256": "a4a081cd05dcbb3a5b3a9c4b32b184acf152a99b115a82dd7058c3fe0aa9c843",
      "shim_sha256": "b895c22740dd6b34fc9ba70ca3aa80e574c34468cf488824a5f5f2745c5aa280"
    }
  }
}
