music/exemplars/formula_cards/EX_094.json
{
"schema": "formula-card/v1",
"consumer": "docs/proposals/music/MASTERPIECE_PROGRAM.md rung 2 (the archetype synthesis -> MASTERPIECE_STANDARD.md)",
"tier": "RUNG-1 MEASURED",
"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.",
"track_id": "EX_094",
"title": "Dark Creature Pursuit",
"game": "Rayman Legends",
"composer": "Christophe Heral & Billy Martin",
"purpose_class": "TENSION",
"source_path": "D:\\audio\\exemplars\\iTunes_Sweep\\Christophe Héral & Billy Martin\\Rayman Legends (Original Game Soundtrack\\35 Dark Creature Pursuit.m4a",
"sha256": "55a606f9e2773c0ddf8a0ac9f97ff375cc739feac4ccc6b77840a63dda47eea5",
"bytes": 4352375,
"source_format": "mov,mp4,m4a,3gp,3g2,mj2",
"source_codec": "aac",
"source_sample_rate_hz": 44100,
"source_channels": 2,
"lossless_source": false,
"analysis_sample_rate_hz": 22050,
"decoder": "ffmpeg.exe :: ffmpeg version 9.0-full_build-www.gyan.dev Copyright (c) 2000-2026 the FFmpeg developers",
"measured_at": "2026-08-07T19:00:45+00:00",
"format_induced_limit": "lossy source (aac); high-band timbre figures carry codec artefacts and the card declares it",
"control": {
"controls_passed": 37,
"controls_total": 37,
"ran_at": "2026-08-07T19:00:45+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."
},
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{
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},
{
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},
{
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}
],
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"rubato_depth_bpm": 95.467
},
"global_bpm": 89.1,
"octave_ambiguity_note": "Beat trackers pick a metrical level, and half/double-time readings are a real and known property, not an error -- the rig's own control plants 120 bpm and this estimator returns 60. Every bar figure on this card (time-to-hook in bars, the complexity index's bar length) inherits whichever level was picked, so compare bar counts within a card, never across cards, until rung 2 pins the metrical level per class.",
"windowed_tempo_stability": {
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"tempo_bpm_median_local": 103.36,
"tempo_iqr_bpm": 28.35,
"tempo_stability": 0.0,
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},
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"dominant_onset_period_bpm": 45.33,
"metre": {
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"note": "Bar arithmetic on this card uses 4 beats per bar at the baseline tempo. The onset period beside it is MEASURED; the signature is not."
},
"groove": {
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}
},
"tonality": {
"key": "C",
"mode": "major",
"windowed_key_agreement": 0.2414,
"modulation_note": "Windowed key agreement below ~0.7 is the modulation signal at rung 1; a pivot-chord map needs symbolic transcription (rung 2)."
},
"the_hook": {
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"onset_bars": 0.77,
"pitch_contour": "DUUDUU---UD----",
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"is_licensed_leap": true
}
},
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},
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"confidence": "LOW-FOR-ROSTER, USABLE-FOR-ARRANGEMENT",
"method_note": "Section 11.1 requires the lane method be declared. Bands are not instruments: two instruments in one octave read as one lane, and one instrument spanning two octaves reads as two. Entry/exit and simultaneity shapes are trustworthy; a roster is not claimed.",
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"low_mid",
"mid",
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55.983,
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61.324,
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62.647,
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63.994,
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78.669,
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93.019,
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101.982,
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108.646,
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109.993,
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111.363,
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