music/records/exemplars/UNMATCHED__09_Impure_Spectrum.acquisition.json
{
"schema": "exemplar-acquisition-proof/v1",
"verdict": "REJECT_UNMATCHED",
"track_id": "UNMATCHED__09_Impure_Spectrum",
"source_path": "D:\\audio\\exemplars\\iTunes_Sweep\\Mick Gordon\\DOOM (Original Game Soundtrack)\\09 Impure Spectrum.m4a",
"sha256": "bb28fbcc28ebeb3d0b94ae838fdef8889ddc71e660eb1c8274c1de37d7f227e3",
"bytes": 3907007,
"source_format": "mov,mp4,m4a,3gp,3g2,mj2",
"source_codec": "aac",
"source_sample_rate_hz": 44100,
"lossless_source": false,
"decoder": "ffmpeg.exe :: ffmpeg version 9.0-full_build-www.gyan.dev Copyright (c) 2000-2026 the FFmpeg developers",
"measured_at": "2026-08-07T04:54:15+00:00",
"measurements_summary": {
"duration_s": 104.544,
"sections": 7,
"baseline_bpm": 152.0,
"key": "D",
"mode": "minor",
"max_lanes": 9,
"melodic_salience": 0.9017,
"note_count": 131,
"events": {
"drops": 13,
"raises": 20,
"breaks": 2,
"tuttis": 1
},
"silence_budget": 0.0424,
"dynamic_range_db": 25.51,
"onset_type": "silence_then_hit",
"time_to_hook_s": 21.304,
"complexity_boundary_step_share": 0.263
},
"formula_card": "build/audio/exemplars/formula_cards/UNMATCHED__09_Impure_Spectrum.json",
"formula_card_page": "build/audio/exemplars/formula_cards/UNMATCHED__09_Impure_Spectrum.md",
"corpus_match": {
"matched": false,
"reason": "no corpus row scored above the 0.62 bar on title AND total",
"candidates": [
{
"id": "EX_040",
"t": "File Select Theme",
"g": "Super Mario 64",
"score": 0.302,
"title_score": 0.3338
},
{
"id": "EX_046",
"t": "BFG Division",
"g": "Doom",
"score": 0.3011,
"title_score": 0.124
},
{
"id": "EX_104",
"t": "Motor Species",
"g": "Ridge Racer Type 4",
"score": 0.2767,
"title_score": 0.31
},
{
"id": "EX_144",
"t": "Mute City",
"g": "F-Zero",
"score": 0.2583,
"title_score": 0.31
},
{
"id": "EX_047",
"t": "The Only Thing They Fear Is You",
"g": "Doom Eternal",
"score": 0.2541,
"title_score": 0.0827
}
],
"evidence": {
"tag_title": "Impure Spectrum",
"tag_album": "DOOM (Original Game Soundtrack)",
"tag_artist": "Mick Gordon",
"filename_stem": "09 Impure Spectrum"
}
},
"corpus_row": null,
"corpus_flip": {
"flipped": false,
"reason": "not attempted"
},
"control": {
"controls_passed": 24,
"controls_total": 24,
"ran_at": "2026-08-06T20:41:42+00:00",
"ffmpeg_version": "ffmpeg version 9.0-full_build-www.gyan.dev Copyright (c) 2000-2026 the FFmpeg developers",
"note": "This measurement is admissible only because the positive control recovered its planted answers in the same process, immediately before it."
},
"legal_posture": "ANALYSIS FOR UNDERSTANDING ONLY. Audio lawfully obtained by Josh, read from disk, measured, and never copied, redistributed, or used as model input of any kind."
}