{
  "title": "Coastal Steel",
  "composer": "Original authored composition for RustRaptor Iron Coast",
  "format": "MUS with explicit note velocities and standard GM programs",
  "service_clock_hz": 70,
  "tempo_bpm": 140,
  "meter": "4/4",
  "bars": 56,
  "duration_ticks": 6720,
  "duration_seconds": 96.0,
  "tonality": "E minor with G-major contrast and B-major turnaround",
  "sections": [
    {
      "name": "Approach",
      "first_bar": 0,
      "bars": 4
    },
    {
      "name": "Breakwater riff",
      "first_bar": 4,
      "bars": 12
    },
    {
      "name": "Offshore pursuit",
      "first_bar": 16,
      "bars": 12
    },
    {
      "name": "Stormwall bridge",
      "first_bar": 28,
      "bars": 8
    },
    {
      "name": "Citadel assault",
      "first_bar": 36,
      "bars": 16
    },
    {
      "name": "Return to coast",
      "first_bar": 52,
      "bars": 4
    }
  ],
  "channels": {
    "0": 33,
    "1": 30,
    "2": 29,
    "3": 81,
    "4": 48,
    "15": "standard percussion"
  },
  "instrument_preload_table": [
    29,
    30,
    33,
    48,
    81,
    136,
    138,
    142,
    143,
    145,
    146,
    147,
    149
  ],
  "percussion_preload_encoding": "100 + MIDI percussion key (MUS convention)",
  "events": 5520,
  "notes": 2748,
  "groups": 2855,
  "max_events_per_tick": 24,
  "file": "music/iron-coast.mus",
  "bytes": 16700,
  "sha256": "c0b5557877585d072e431b220531663de34f8364abc4f93dc17cc025c9801057",
  "recipe": "build_music.py",
  "sources": "Authored note sequences and deterministic arrangement; no original-game score or recording used",
  "rendering": "Existing Rust MUS decoder and GENMIDI/OPL3 synthesizer; original instrument bank remains external"
}