{
  "ruling": "D-20260831-03 — the telephone-rate exclusions",
  "kind": "CONTAINER-RATE exclusion",
  "kind_note": "The file's own sample rate puts Nyquist at or below 8 kHz, so the genre's top octave — hi-hats, rides, the transient edge of every percussive hit — is physically ABSENT from the container, not merely quiet. This is distinct from the content-bandwidth thresholding that lesson 3 forbids: nothing here is judged on how much energy the CONTENT carries near its own Nyquist. The test is the container's rate, read off ffprobe, and it is decided per ITEM so no EP straddles. A lossy-dulled but 44.1 kHz file stays in the corpus.",
  "excluded_from": [
    "training",
    "holdout"
  ],
  "items": [
    "TFN223",
    "TFN247"
  ],
  "tracks_excluded": 8,
  "tracks": [
    {
      "work_key": "TFN223__01GraffitiMechanism-DaybreaknumbfortablyCumbMix.flac",
      "identifier": "TFN223",
      "filename": "01GraffitiMechanism-DaybreaknumbfortablyCumbMix.flac",
      "tier": "BY-SA",
      "licenseurl": "http://creativecommons.org/licenses/by-sa/3.0/us/",
      "measured_sample_rate_hz": 16000,
      "nyquist_khz": 8.0,
      "measured_ceiling_khz": 0.92,
      "codec": "flac",
      "duration_s": 138.411,
      "reason": "container sample rate 16000 Hz -> Nyquist 8.0 kHz; the genre's top octave cannot be present in this file at any playback. Excluded from BOTH training and holdout so it neither teaches nor scores the adapter."
    },
    {
      "work_key": "TFN223__02GraffitiMechanism-AftermarketWarheadspeaceheadsMixdown.flac",
      "identifier": "TFN223",
      "filename": "02GraffitiMechanism-AftermarketWarheadspeaceheadsMixdown.flac",
      "tier": "BY-SA",
      "licenseurl": "http://creativecommons.org/licenses/by-sa/3.0/us/",
      "measured_sample_rate_hz": 16000,
      "nyquist_khz": 8.0,
      "measured_ceiling_khz": 0.78,
      "codec": "flac",
      "duration_s": 438.174,
      "reason": "container sample rate 16000 Hz -> Nyquist 8.0 kHz; the genre's top octave cannot be present in this file at any playback. Excluded from BOTH training and holdout so it neither teaches nor scores the adapter."
    },
    {
      "work_key": "TFN223__03GraffitiMechanism-AlreadyDeadzombieMixdownVersion.flac",
      "identifier": "TFN223",
      "filename": "03GraffitiMechanism-AlreadyDeadzombieMixdownVersion.flac",
      "tier": "BY-SA",
      "licenseurl": "http://creativecommons.org/licenses/by-sa/3.0/us/",
      "measured_sample_rate_hz": 16000,
      "nyquist_khz": 8.0,
      "measured_ceiling_khz": 3.13,
      "codec": "flac",
      "duration_s": 137.036,
      "reason": "container sample rate 16000 Hz -> Nyquist 8.0 kHz; the genre's top octave cannot be present in this file at any playback. Excluded from BOTH training and holdout so it neither teaches nor scores the adapter."
    },
    {
      "work_key": "TFN223__04GraffitiMechanism-AftermathatomicNrgFalloutMix.flac",
      "identifier": "TFN223",
      "filename": "04GraffitiMechanism-AftermathatomicNrgFalloutMix.flac",
      "tier": "BY-SA",
      "licenseurl": "http://creativecommons.org/licenses/by-sa/3.0/us/",
      "measured_sample_rate_hz": 16000,
      "nyquist_khz": 8.0,
      "measured_ceiling_khz": 0.38,
      "codec": "flac",
      "duration_s": 254.973,
      "reason": "container sample rate 16000 Hz -> Nyquist 8.0 kHz; the genre's top octave cannot be present in this file at any playback. Excluded from BOTH training and holdout so it neither teaches nor scores the adapter."
    },
    {
      "work_key": "TFN247__01GraffitiMechanism-DaybreakdaybrokeMix.wav",
      "identifier": "TFN247",
      "filename": "01GraffitiMechanism-DaybreakdaybrokeMix.wav",
      "tier": "BY-SA",
      "licenseurl": "http://creativecommons.org/licenses/by-sa/3.0/us/",
      "measured_sample_rate_hz": 16000,
      "nyquist_khz": 8.0,
      "measured_ceiling_khz": 8.0,
      "codec": "pcm_s16le",
      "duration_s": 156.944,
      "reason": "container sample rate 16000 Hz -> Nyquist 8.0 kHz; the genre's top octave cannot be present in this file at any playback. Excluded from BOTH training and holdout so it neither teaches nor scores the adapter."
    },
    {
      "work_key": "TFN247__02GraffitiMechanism-AftermarketWarheadsstickyMixwaydown.wav",
      "identifier": "TFN247",
      "filename": "02GraffitiMechanism-AftermarketWarheadsstickyMixwaydown.wav",
      "tier": "BY-SA",
      "licenseurl": "http://creativecommons.org/licenses/by-sa/3.0/us/",
      "measured_sample_rate_hz": 8000,
      "nyquist_khz": 4.0,
      "measured_ceiling_khz": 4.0,
      "codec": "pcm_s16le",
      "duration_s": 369.334,
      "reason": "container sample rate 8000 Hz -> Nyquist 4.0 kHz; the genre's top octave cannot be present in this file at any playback. Excluded from BOTH training and holdout so it neither teaches nor scores the adapter."
    },
    {
      "work_key": "TFN247__03GraffitiMechanism-AlreadyDeaduntitledEditionMix3.2.wav",
      "identifier": "TFN247",
      "filename": "03GraffitiMechanism-AlreadyDeaduntitledEditionMix3.2.wav",
      "tier": "BY-SA",
      "licenseurl": "http://creativecommons.org/licenses/by-sa/3.0/us/",
      "measured_sample_rate_hz": 16000,
      "nyquist_khz": 8.0,
      "measured_ceiling_khz": 1.5,
      "codec": "pcm_s16le",
      "duration_s": 455.094,
      "reason": "container sample rate 16000 Hz -> Nyquist 8.0 kHz; the genre's top octave cannot be present in this file at any playback. Excluded from BOTH training and holdout so it neither teaches nor scores the adapter."
    },
    {
      "work_key": "TFN247__04GraffitiMechanism-Aftermathm.i.x.Mix.wav",
      "identifier": "TFN247",
      "filename": "04GraffitiMechanism-Aftermathm.i.x.Mix.wav",
      "tier": "BY-SA",
      "licenseurl": "http://creativecommons.org/licenses/by-sa/3.0/us/",
      "measured_sample_rate_hz": 16000,
      "nyquist_khz": 8.0,
      "measured_ceiling_khz": 7.83,
      "codec": "pcm_s16le",
      "duration_s": 320.8,
      "reason": "container sample rate 16000 Hz -> Nyquist 8.0 kHz; the genre's top octave cannot be present in this file at any playback. Excluded from BOTH training and holdout so it neither teaches nor scores the adapter."
    }
  ],
  "retained_on_disk": true,
  "retained_note": "The files stay in audio/ and in manifest.sha256 — the decision is visible and reversible, exactly as the intake receipt left it."
}