{
  "discovery": "hardware-audio",
  "ledger_ids": [
    "AUDIT-001",
    "SAGSIG-001",
    "SAGSIG-002",
    "SAGSIG-003",
    "TADTID-005"
  ],
  "confidence": "Confirmed",
  "claims": [
    {
      "id": "AUDIT-001",
      "claim": "The game ships a second, lower-quality soundtrack that only plays on low-spec machines (low RAM or a slow CD drive). On a normal setup these versions never play.",
      "tier": "Confirmed",
      "limit": "The music relationship checks do not reproduce live playback or mixing.",
      "type": "Static executable trace; RadeonChan recognition record prompted the investigation.",
      "method": "Trace the game’s RAM and CD-speed checks and the audio filenames they select. Decode the retail music and check the decoder against isolated execution of the game’s own routine."
    },
    {
      "id": "SAGSIG-001",
      "claim": "The music files use a SLAG-tagged container around ADPCM sample data.",
      "tier": "Confirmed",
      "limit": "",
      "type": "Static container/hash evidence; original-code emulation validates the corrected decode path on three inputs.",
      "method": "Trace the game’s RAM and CD-speed checks and the audio filenames they select. Decode the retail music and check the decoder against isolated execution of the game’s own routine."
    },
    {
      "id": "SAGSIG-002",
      "claim": "The twelve SAG files declare 22,050 Hz mono audio; the eleven SIG files declare 11,025 Hz mono.",
      "tier": "Confirmed",
      "limit": "",
      "type": "Static container/hash evidence; original-code emulation validates the corrected decode path on three inputs.",
      "method": "Trace the game’s RAM and CD-speed checks and the audio filenames they select. Decode the retail music and check the decoder against isolated execution of the game’s own routine."
    },
    {
      "id": "SAGSIG-003",
      "claim": "The compressed music payload occupies one quarter of the declared decoded PCM size, subject to the loader’s truncation.",
      "tier": "Confirmed",
      "limit": "",
      "type": "Static container/hash evidence; original-code emulation validates the corrected decode path on three inputs.",
      "method": "Trace the game’s RAM and CD-speed checks and the audio filenames they select. Decode the retail music and check the decoder against isolated execution of the game’s own routine."
    },
    {
      "id": "TADTID-005",
      "claim": "The other twenty TID banks contain 11,025 Hz, 8-bit audio, while garg.tid retains its mixed formats.",
      "tier": "Confirmed",
      "limit": "The distinction is measured from format fields, not assumed from extensions.",
      "type": "Static evidence.",
      "method": "Trace the game’s RAM and CD-speed checks and the audio filenames they select. Decode the retail music and check the decoder against isolated execution of the game’s own routine."
    }
  ],
  "examined_inputs": [
    {
      "name": "Hot Wheels - Stunt Track Driver.iso",
      "sha256": "82707d3f37ed08c4ce2c39bc28b29942cf7ee746ce67d8d957efea024cd56b80"
    },
    {
      "name": "stunt.exe",
      "sha256": "a938949d705e2e06af80c22bdd76b10b52df811342e5a5b28bc23ba716903850"
    }
  ],
  "method": "Trace the game’s RAM and CD-speed checks and the audio filenames they select. Decode the retail music and check the decoder against isolated execution of the game’s own routine.",
  "verification": "Historical research and audit records support the statements above. This assembly verifies mapping and media hashes; it does not rerun the excavation or establish a new gameplay observation.",
  "scope": "Reviewed publication summary. Private research notes, personal review records and raw game files are not included. Input hashes identify the 1998 source; they are not independent proof of each conclusion."
}