{
  "schema_version": 1,
  "date": "2026-10-18",
  "specimen_serial": "XXXXXXXXXXXXXXXX",
  "firmware_evidence": "AudioFormats-2026-10-18.json",
  "firmware_reported_revision": "74c1c8ab-dirty",
  "implementation_commit": "20d9d368900080b51a592f77abf4caf9b69ff034",
  "method": "Explicit-device native HAL PCM24 at 48 kHz with 1 kHz, amplitude-0.125 stereo input; serial-scoped canonical HID requests while the stream runs.",
  "maximum_configuration": {
    "muted": true,
    "high_pass_enabled": true,
    "high_pass_hz": 5000,
    "attenuation_db": 0,
    "eq_frequency_hz": [
      20,
      100,
      1000,
      10000,
      20000
    ],
    "all_five_eq_bands_enabled": true,
    "eq_gain_db": 12,
    "eq_quality": 10,
    "limiter_threshold_db": -36,
    "limiter_release_ms": 2000
  },
  "audio": {
    "kind": "audio_run_complete",
    "bits": 24,
    "frames": 588800,
    "default_uids_unchanged": true
  },
  "status_samples": [
    {
      "kind": "status",
      "persisted_generation": 3,
      "storage_available": 1,
      "streaming": 0,
      "input_peak": 0,
      "output_peak": 0,
      "underruns": 0,
      "overruns": 0,
      "max_processing_us": 919,
      "deadline_us": 1000
    },
    {
      "kind": "status",
      "persisted_generation": 3,
      "storage_available": 1,
      "streaming": 1,
      "input_peak": 0.125,
      "output_peak": 0,
      "underruns": 0,
      "overruns": 0,
      "max_processing_us": 919,
      "deadline_us": 1000
    },
    {
      "kind": "status",
      "persisted_generation": 3,
      "storage_available": 1,
      "streaming": 1,
      "input_peak": 0.125,
      "output_peak": 0,
      "underruns": 0,
      "overruns": 0,
      "max_processing_us": 919,
      "deadline_us": 1000
    },
    {
      "kind": "status",
      "persisted_generation": 4,
      "storage_available": 1,
      "streaming": 1,
      "input_peak": 0,
      "output_peak": 0,
      "underruns": 0,
      "overruns": 8,
      "max_processing_us": 919,
      "deadline_us": 1000
    },
    {
      "kind": "status",
      "persisted_generation": 4,
      "storage_available": 1,
      "streaming": 1,
      "input_peak": 0.125,
      "output_peak": 0,
      "underruns": 0,
      "overruns": 8,
      "max_processing_us": 919,
      "deadline_us": 1000
    },
    {
      "kind": "status",
      "persisted_generation": 4,
      "storage_available": 1,
      "streaming": 1,
      "input_peak": 0.125,
      "output_peak": 0,
      "underruns": 0,
      "overruns": 8,
      "max_processing_us": 919,
      "deadline_us": 1000
    },
    {
      "kind": "status",
      "persisted_generation": 4,
      "storage_available": 1,
      "streaming": 1,
      "input_peak": 0.125,
      "output_peak": 0,
      "underruns": 0,
      "overruns": 8,
      "max_processing_us": 919,
      "deadline_us": 1000
    },
    {
      "kind": "status",
      "persisted_generation": 4,
      "storage_available": 1,
      "streaming": 1,
      "input_peak": 0.125,
      "output_peak": 0,
      "underruns": 0,
      "overruns": 8,
      "max_processing_us": 919,
      "deadline_us": 1000
    },
    {
      "kind": "status",
      "persisted_generation": 4,
      "storage_available": 1,
      "streaming": 1,
      "input_peak": 0.125,
      "output_peak": 0,
      "underruns": 0,
      "overruns": 8,
      "max_processing_us": 919,
      "deadline_us": 1000
    },
    {
      "kind": "status",
      "persisted_generation": 4,
      "storage_available": 1,
      "streaming": 1,
      "input_peak": 0.125,
      "output_peak": 0,
      "underruns": 0,
      "overruns": 8,
      "max_processing_us": 919,
      "deadline_us": 1000
    },
    {
      "kind": "status",
      "persisted_generation": 4,
      "storage_available": 1,
      "streaming": 1,
      "input_peak": 0.125,
      "output_peak": 0,
      "underruns": 0,
      "overruns": 8,
      "max_processing_us": 919,
      "deadline_us": 1000
    },
    {
      "kind": "status",
      "persisted_generation": 4,
      "storage_available": 1,
      "streaming": 1,
      "input_peak": 0.125,
      "output_peak": 0,
      "underruns": 0,
      "overruns": 8,
      "max_processing_us": 919,
      "deadline_us": 1000
    },
    {
      "kind": "status",
      "persisted_generation": 4,
      "storage_available": 1,
      "streaming": 1,
      "input_peak": 0.125,
      "output_peak": 0,
      "underruns": 0,
      "overruns": 8,
      "max_processing_us": 919,
      "deadline_us": 1000
    },
    {
      "kind": "status",
      "persisted_generation": 4,
      "storage_available": 1,
      "streaming": 1,
      "input_peak": 0.125,
      "output_peak": 0,
      "underruns": 0,
      "overruns": 8,
      "max_processing_us": 919,
      "deadline_us": 1000
    },
    {
      "kind": "status",
      "persisted_generation": 5,
      "storage_available": 1,
      "streaming": 1,
      "input_peak": 0.125,
      "output_peak": 0,
      "underruns": 0,
      "overruns": 17,
      "max_processing_us": 919,
      "deadline_us": 1000
    },
    {
      "kind": "status",
      "persisted_generation": 5,
      "storage_available": 1,
      "streaming": 1,
      "input_peak": 0.125,
      "output_peak": 0,
      "underruns": 0,
      "overruns": 17,
      "max_processing_us": 919,
      "deadline_us": 1000
    },
    {
      "kind": "status",
      "persisted_generation": 5,
      "storage_available": 1,
      "streaming": 1,
      "input_peak": 0.125,
      "output_peak": 0,
      "underruns": 0,
      "overruns": 17,
      "max_processing_us": 919,
      "deadline_us": 1000
    }
  ],
  "persistence": {
    "saved_generations": [
      4,
      5
    ],
    "exact_apply_and_persist_retries_verified": true,
    "stale_generation_rejected": true,
    "baseline_snapshot_restored_byte_identically": true,
    "baseline_snapshot_sha256": "c9a6a3babe383f1c7eedd5669d4fe68d33593d645dec82597790fd8ab3ac6ff6",
    "final_generation": 5,
    "final_persisted_generation": 5,
    "final_attenuation_db": -24,
    "final_muted": true
  },
  "counter_observations": {
    "before_saves_overruns": 0,
    "after_first_save_overruns": 8,
    "after_second_save_overruns": 17,
    "stable_streaming_counters_unchanged_between_saves": true,
    "after_stop_underruns": 1,
    "maximum_processing_us_before_and_during_run": 919,
    "block_deadline_us": 1000,
    "interpretation": "The aggregate overrun counter increased at saves, consistent with the intentional maintenance producer gate. It combines rejected packets, DSP failures, and deadline misses; these samples do not classify each increment independently."
  },
  "suspend_attempt": {
    "method": "Serial/VID/PID-matched IOUSBDeviceInterface500, USBDeviceOpen without seize, then USBDeviceSuspend(true).",
    "open_returned_success": true,
    "suspend_returned_success": true,
    "suspended_port_bit_after_one_second": false,
    "cleanup_resume_returned_success": true,
    "post_attempt_hid_reachable": true,
    "default_output_uids_unchanged": true,
    "accepted": false
  },
  "limits": [
    "Digitally muted profile throughout; all six filters and limiter state execute before the profile-mute return. The final unmuted clamp path was not exercised.",
    "Maximum processing is a boot-session high-water value, already 919 us before this run, not a configuration-specific histogram.",
    "The measured interval excludes DMA wait/submission. This is not a universal real-time or electrical headroom claim.",
    "The host generated 588800 frames; this is not a measurement of frames at the speaker or I2S pins.",
    "The post-stop underrun source and confirmed physical suspend/resume still require investigation.",
    "No electrical measurements, audible qualification, physical power-loss test, or runtime stack high-water measurement."
  ]
}