{
  "format": "database-song-experiment/v1",
  "title": "Side Channel",
  "sample_rate_hz": 48000,
  "channels": 2,
  "duration_seconds": 40.0,
  "tempo_bpm": 96,
  "database_bytes": 3584,
  "database_sha256": "a59777299e13c94b65532986ac786ca93e8b1ffd73bfb45e1c8a849eb71a2f22",
  "compressed_bytes": 867,
  "packet_bytes": 918,
  "frame_bits": 22320,
  "fec": "repetition-3 majority vote",
  "carrier": {
    "modulation": "binary frequency-shift keying",
    "channel": "(left - right) / 2",
    "zero_hz": 18000,
    "one_hz": 20000,
    "baud": 1000,
    "amplitude_peak": 0.018,
    "start_seconds": 2.5,
    "duration_seconds": 22.32,
    "rms_db_below_music": -19.322938391363774
  },
  "audio": {
    "peak": 0.7832326700358253,
    "rms": 0.11811798215246334,
    "wav_bytes": 7680044
  },
  "clean_recovery": {
    "prefix_bit_errors": 0,
    "decoded": true,
    "sha256_match": true,
    "integrity_check": "ok",
    "database_bytes": 3584,
    "sha256": "a59777299e13c94b65532986ac786ca93e8b1ffd73bfb45e1c8a849eb71a2f22",
    "recovered_title": "Side Channel",
    "liner_note_count": 4
  },
  "benchmark_cases": 12,
  "benchmark_exact_recoveries": 9,
  "limitations": [
    "The decoder uses a known carrier start time and symbol rate.",
    "The benchmark applies deterministic digital transformations, not a speaker-to-microphone loopback.",
    "Mono conversion and low-pass filtering below the carrier intentionally destroy the payload.",
    "Listenability is a human judgment; the manifest records signal levels rather than claiming a perceptual score."
  ]
}