music/exemplars/formula_cards/EX_102.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_102",
"title": "Magus Castle",
"game": "Chrono Trigger",
"composer": "Yasunori Mitsuda",
"purpose_class": "TENSION",
"source_path": "D:\\audio\\exemplars\\iTunes_Sweep\\Yasunori Mitsuda\\Chrono Trigger (Original Soundtrack) [DS\\2-22 Magus' Castle.m4a",
"sha256": "b99e8e371eaeb1f2bde416452e09b4837904087a876c637dd631ac499bbe4d15",
"bytes": 1408587,
"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": "2026-08-07T12:08:26+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": "2026-08-07T12:06:10+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."
},
"card": {
"duration_and_structure": {
"total_length_s": 28.58,
"section_boundaries_s": [
0.0,
5.224,
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"section_count": 4,
"repeat_map": [
{
"section": 0,
"most_like_section": null,
"similarity": 0.0,
"is_repeat": false
},
{
"section": 1,
"most_like_section": 0,
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"is_repeat": false
},
{
"section": 2,
"most_like_section": 1,
"similarity": 0.918,
"is_repeat": true
},
{
"section": 3,
"most_like_section": 2,
"similarity": 0.63,
"is_repeat": false
}
],
"novelty_peak_strength": [
0.8459,
1.0,
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],
"method": "checkerboard-kernel novelty over a chroma+MFCC self-similarity matrix"
},
"tempo_and_time_grammar": {
"tempo_function": {
"baseline_bpm": 152.0,
"curve_times_s": [
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0.37,
0.74,
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1.86,
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234.91,
234.91,
234.91,
234.91,
234.91,
234.91,
234.91,
234.91,
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143.55,
143.55,
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152.0,
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152.0,
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161.5,
161.5,
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136.0,
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73.83,
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76.0,
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184.57,
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184.57,
184.57,
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184.57,
184.57,
184.57,
234.91,
258.4,
258.4,
258.4
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{
"position_s": 0.35,
"duration_s": 3.13,
"delta_bpm": 53.22,
"shape": "step"
},
{
"position_s": 8.13,
"duration_s": 2.44,
"delta_bpm": -27.17,
"shape": "step"
},
{
"position_s": 15.67,
"duration_s": 5.67,
"delta_bpm": -58.35,
"shape": "step"
},
{
"position_s": 21.59,
"duration_s": 6.76,
"delta_bpm": 40.35,
"shape": "step"
}
],
"dispersion_bpm": 51.084,
"rubato_depth_bpm": 161.08
},
"global_bpm": 129.2,
"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": {
"tempo_bpm_global": 129.2,
"tempo_bpm_median_local": 129.2,
"tempo_iqr_bpm": 11.75,
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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."
},
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"key": "E",
"mode": "minor",
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"modulation_note": "Windowed key agreement below ~0.7 is the modulation signal at rung 1; a pivot-chord map needs symbolic transcription (rung 2)."
},
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1,
24,
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28,
42,
43
],
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24.0,
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28.0,
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28.0
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"range_semitones": 43.0,
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"at_note_index": 1,
"is_licensed_leap": true
}
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"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": [
"sub",
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"low_mid",
"mid",
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"brilliance",
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[
19.296,
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[
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[
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]
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[
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{
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355,
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[
6.037,
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7.082,
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{
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]
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"lane": "presence",
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},
{
"lane": "air",
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]
}
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"mean": 7.245
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"register_spacing_octaves": [
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},
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"at_s": 24.218,
"db_delta": -6.59,
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"bars_held_s": 3.762,
"re_enters_at_s": 27.98
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{
"position": 0.8896,
"at_s": 25.426,
"db_delta": -15.11,
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"bars_held_s": 2.554,
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{
"position": 0.9319,
"at_s": 26.633,
"db_delta": -101.69,
"lanes_removed": -0.0,
"bars_held_s": 1.347,
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"end_s": 0.998,
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{
"position": 0.9782,
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"end_s": 27.98,
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],
"breaks": [
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"at_s": 0.0,
"duration_s": 0.372
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{
"position": 0.9026,
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"duration_s": 2.763
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"duration_s": 1.068,
"lanes": 9
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{
"position": 0.2941,
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"duration_s": 0.882,
"lanes": 9
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{
"position": 0.3364,
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"duration_s": 1.974,
"lanes": 9
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{
"position": 0.4192,
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"lanes": 9
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{
"position": 0.5062,
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"lanes": 9
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{
"position": 0.5882,
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"lanes": 9
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{
"position": 0.6751,
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{
"position": 0.7588,
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"lanes": 9
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"seconds": 3.181,
"threshold": "40 dB below the track's own p95 RMS",
"note": "Section 11.2 treats rest as a FIRST-CLASS parameter, not an absence."
},
"counts": {
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"raises": 2,
"breaks": 2,
"tuttis": 8
}
},
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"time_to_hook_bars": 3.24,
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},
"complexity_law": {
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"bar_length_s": 1.5789,
"bars": 18,
"index_per_bar": [
0.6839,
0.8314,
0.8719,
0.968,
0.9877,
0.9837,
0.998,
0.9931,
0.9929,
0.9902,
0.9863,
1.0,
0.9882,
0.9662,
0.966,
0.7922,
0.0818,
0.0352
],
"definition": "lane count + 4*harmonic change rate + 0.6*onset strength + 0.4*register span, per bar, normalised to the track's own maximum (section 11.6)",
"step_map": [
{
"bar": 15,
"at_s": 23.68,
"delta": -0.174,
"at_section_boundary": false
},
{
"bar": 16,
"at_s": 25.26,
"delta": -0.71,
"at_section_boundary": true
}
],
"steps_at_section_boundaries": 1,
"steps_total": 2,
"boundary_step_share": 0.5,
"hypothesis_note": "Section 11.6 expects masterpieces to step complexity AT structural boundaries and hold it flat inside sections. This share is the measurement of that claim on this track; the corpus decides, not us."
},
"texture_and_density": {
"note_rate_per_s": 1.889,
"melodic_salience": 0.9189,
"voiced_fraction": 0.7214,
"note_count": 54,
"mean_lanes": 7.245,
"max_lanes": 9
},
"dynamics": {
"dynamic_range_db_p95_minus_p10": 50.68,
"peak_position_normalised": 0.8276,
"peak_at_s": 23.638,
"arc_curve_db": [
-54.47,
-60.69,
-14.41,
-16.21,
-14.39,
-12.51,
-12.86,
-12.6,
-12.23,
-12.84,
-12.72,
-11.83,
-11.49,
-11.19,
-10.92,
-11.07,
-10.58,
-9.7,
-9.57,
-9.72,
-9.96,
-10.15,
-10.52,
-10.49,
-9.77,
-9.78,
-9.77,
-9.58,
-9.73,
-9.5,
-9.23,
-8.78,
-8.64,
-17.56,
-35.57,
-58.68,
-133.88,
-197.18,
-144.62
],
"arc_times_s": [
0.0,
0.74,
1.49,
2.23,
2.97,
3.72,
4.46,
5.2,
5.94,
6.69,
7.43,
8.17,
8.92,
9.66,
10.4,
11.15,
11.89,
12.63,
13.37,
14.12,
14.86,
15.6,
16.35,
17.09,
17.83,
18.58,
19.32,
20.06,
20.81,
21.55,
22.29,
23.03,
23.78,
24.52,
25.26,
26.01,
26.75,
27.49,
28.24
]
},
"register": {
"melody_span_semitones": 43.0,
"melody_tessitura_midi": 61.67,
"bass_floor_band": {
"sub": 0.04171,
"low_bass": 0.08757,
"bass": 0.05022,
"low_mid": 0.05776,
"mid": 0.34741,
"upper_mid": 0.20085,
"presence": 0.15812,
"brilliance": 0.05197,
"air": 0.00437,
"ultra": 0.0
},
"octave_band_profile": {
"sub": 0.04171,
"low_bass": 0.08757,
"bass": 0.05022,
"low_mid": 0.05776,
"mid": 0.34741,
"upper_mid": 0.20085,
"presence": 0.15812,
"brilliance": 0.05197,
"air": 0.00437,
"ultra": 0.0
}
},
"cadence_and_ending": {
"loop_seam": {
"measurable": true,
"seam_distance": 1.0,
"interior_distance_median": 0.00845,
"seam_ratio": 118.375,
"seam_clean": false,
"tail_rms_over_mid": 0.0,
"head_rms_over_mid": 0.0,
"tail_rms_trend": 0.0,
"head_rms_trend": 0.7939,
"baked_fade_out": false,
"baked_fade_in": true
},
"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."
},
"timbre": {
"spectral_centroid_hz_mean": 1843.2,
"spectral_centroid_curve_hz": [
0.0,
2462.7,
2820.8,
2929.2,
2980.8,
3235.1,
3383.9,
2971.0,
2603.4,
2775.6,
2559.8,
1964.6,
1967.8,
2005.8,
1762.4,
1762.9,
1833.6,
1416.8,
1701.8,
1866.4,
1566.4,
1554.8,
1763.1,
1705.0,
1421.3,
2171.1,
1614.0,
1722.5,
2192.2,
1673.4,
1702.9,
1590.6,
1689.0,
1138.9,
1013.9,
1165.8,
651.7,
0.0,
0.0
],
"spectral_rolloff85_hz_mean": 3586.7,
"spectral_flatness_mean": 0.07871,
"signature_colour": "warm"
}
}
}