music/exemplars/formula_cards/UNMATCHED__1-08_Kefka.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": "UNMATCHED__1-08_Kefka",
"title": null,
"game": null,
"composer": null,
"purpose_class": null,
"source_path": "D:\\audio\\exemplars\\iTunes_Sweep\\Nobuo Uematsu\\FINAL FANTASY VI (Original Soundtrack)\\1-08 Kefka.m4a",
"sha256": "49235ce815e524601d9d4acab2d09286173472309a0046702ee6cf74890811e0",
"bytes": 5883345,
"source_format": "mov,mp4,m4a,3gp,3g2,mj2",
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"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": "2026-08-07T12:20:50+00:00",
"format_induced_limit": "lossy source (aac); high-band timbre figures carry codec artefacts and the card declares it",
"control": {
"controls_passed": 31,
"controls_total": 31,
"ran_at": "2026-08-07T12:07:20+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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{
"position_s": 6.01,
"duration_s": 8.08,
"delta_bpm": -63.75,
"shape": "step"
},
{
"position_s": 20.87,
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"shape": "step"
},
{
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"delta_bpm": -78.71,
"shape": "step"
},
{
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"shape": "step"
},
{
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},
{
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"shape": "step"
},
{
"position_s": 107.53,
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}
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"rubato_depth_bpm": 83.196
},
"global_bpm": 161.5,
"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": 161.5,
"tempo_iqr_bpm": 80.75,
"tempo_stability": 0.0,
"beat_interval_cv": 0.0247
},
"dominant_onset_period_s": 0.743,
"dominant_onset_period_bpm": 80.75,
"metre": {
"assumed": "4/4",
"measured": null,
"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": {
"swing_ratio": 0.786,
"onset_rate_per_s": 10.765
}
},
"tonality": {
"key": "A#",
"mode": "minor",
"windowed_key_agreement": 0.6905,
"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": {
"available": true,
"onset_s": 0.662,
"onset_bars": 0.45,
"pitch_contour": "U-U-UDUUDDUU-DU",
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2,
3,
4,
5,
11,
12,
13,
14,
16,
17
],
"intervals": [
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3.0,
0.0,
2.0,
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5.0,
12.0,
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11.0,
3.0,
0.0,
-17.0,
11.0
],
"range_semitones": 20.0,
"distinctive_deviation": {
"largest_interval_semitones": -17.0,
"at_note_index": 14,
"is_licensed_leap": true
}
},
"motif_economy": {
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"self_similarity_baseline": 0.6811,
"self_similarity_lift": 0.2997,
"recurrence_lag_s": 77.276,
"interval_3gram_repetition": 0.3678,
"interval_4gram_repetition": 0.3112
},
"lane_analysis": {
"method": "spectral_band_proxy",
"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.",
"lane_roster_bands": [
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"low_bass",
"bass",
"low_mid",
"mid",
"upper_mid",
"presence",
"brilliance",
"air",
"ultra"
],
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"lane": "sub",
"band_hz": [
20,
45
],
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11.703,
12.26
],
[
24.427,
25.681
],
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],
[
30.395,
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},
{
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},
{
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},
{
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},
{
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},
{
"bar": 42,
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},
{
"bar": 46,
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},
{
"bar": 51,
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},
{
"bar": 52,
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},
{
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},
{
"bar": 58,
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},
{
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},
{
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},
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},
{
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},
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},
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},
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},
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}
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"baked_fade_in": true
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"ending": "through_or_loop",
"cadence_census_note": "A cadence census needs harmonic transcription and is a rung-2 dimension; the seam measurement is what rung 1 can honestly report about how it ends."
},
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}