{
  "schema": "raw-envelope-fixed-metrics-public-addendum-v1",
  "experiment_label": "2026-10-19",
  "role": "Append-only follow-up to the saved acoustic checkpoint; the earlier missing-value snapshot remains unchanged.",
  "state": "completed_with_missing_observations",
  "completed_rows": 90,
  "measurement_started_utc": "2026-10-18T17:45:53.038363+00:00",
  "measurement_completed_utc": "2026-10-18T17:55:30.475506+00:00",
  "scientific_units": {
    "recordings": 5,
    "speakers": 4,
    "conditions": 90,
    "conditions_per_variant": 30,
    "seeds_are_paired_repeats_not_independent_recordings": true,
    "repeat_executions_not_pooled": true,
    "inferential_statistics_performed": false
  },
  "metric_units": {
    "row_relative_f0_mae_cents": "cent",
    "row_unvoiced_miss_rate": "fraction",
    "row_recognition": "CER rate difference from original, fraction; full CER and WER counts and rates are retained in detail",
    "comparison_automatic_mos": "predicted MOS difference to same-pitch same-seed PML",
    "comparison_relative_f0_mae_cents": "cent difference to same-pitch same-seed PML",
    "comparison_unvoiced_miss_rate": "percentage-point difference to same-pitch same-seed PML",
    "aggregate_asr_cer_delta_pp": "percentage-point difference to same-pitch same-seed PML",
    "aggregate_asr_wer_delta_pp": "percentage-point difference to same-pitch same-seed PML"
  },
  "pitch_reference": "same variant, same seed, saved native output; not absolute natural F0 truth",
  "native_pitch_metric": "not_applicable/native_no_edit; no self-identity metric executed",
  "aggregation": {
    "aggregation": "Average over the fixed pitches and both seeds within each recording, then equal-weight mean over 5 recordings; balanced condition mean is numerically identical. Descriptive only.",
    "metric_status_counts": {
      "automatic_mos": {
        "available": 90
      },
      "relative_f0_mae_cents": {
        "not_applicable": 30,
        "available": 60
      },
      "unvoiced_miss_rate": {
        "not_applicable": 30,
        "available": 60
      },
      "recognition": {
        "unavailable": 54,
        "available": 36
      }
    },
    "metric_reason_counts": {
      "automatic_mos": {},
      "relative_f0_mae_cents": {
        "native_no_edit": 30
      },
      "unvoiced_miss_rate": {
        "native_no_edit": 30
      },
      "recognition": {
        "official_excerpt_ground_truth_not_prepared": 54
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    },
    "raw_mos_recording_macro_means": {
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      "RAW_SHAPE": 3.397873361905416,
      "RAW_FULL": 3.4325957934061684
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    "fixed_harm_thresholds": {
      "automatic_mos": {
        "direction": "drop",
        "strict_threshold": 0.15,
        "unit": "predicted MOS"
      },
      "relative_f0_mae_cents": {
        "direction": "increase",
        "strict_threshold": 10,
        "unit": "cent"
      },
      "unvoiced_miss_rate": {
        "direction": "increase",
        "strict_threshold": 2,
        "unit": "percentage points"
      }
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    "recognition_harm_threshold": null,
    "global_by_variant": [
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    "YIN measures relative edit tracking against the same variant and seed native synthesis. Native absolute F0 error is unmeasured; cross-variant support sets and voiced-frame denominators may differ.",
    "Recognition is available for only two of the five recordings. The remaining three have no prepared official excerpt-specific transcript; no ASR output was substituted as ground truth.",
    "Matching CER/WER does not establish waveform, transcript, phoneme-onset or perceptual-quality identity.",
    "An absent threshold violation is not proof of no harm. The original acoustic warnings are preserved.",
    "All observations share five recordings and four speakers. Repeated seeds and executions are not independent samples; the means are descriptive.",
    "Source-periodic AM was not separated. No adoption or formal 120-recording evaluation follows from this addendum."
  ],
  "decision": {
    "baseline": "PML",
    "RAW_FULL_adopted": false,
    "RAW_SHAPE_adopted": false,
    "source_periodic_AM_separation": "not_attempted",
    "formal_120_evaluation": "not_run",
    "expansion": "on_hold",
    "necessary_observations_missing": true
  },
  "public_projection": {
    "included": "All 90 quality scalar records with their missing-value reasons and support counts, all 60 saved paired comparisons, fixed model and source hashes, and descriptive aggregates.",
    "omitted": [
      "framewise F0/time arrays",
      "ASR transcript text",
      "implementation code",
      "audio",
      "model weights"
    ],
    "array_omission": "Each full per-condition metric JSON is identified by SHA-256. The three F0 frame arrays are omitted from the public scalar projection; all their saved scalar summaries and support counts remain.",
    "attribution": "The LibriSpeech attribution and source modifications are documented in README-ja.md and reproducibility.json."
  }
}
