music/exemplars/formula_cards/UNMATCHED__20_S.E._Tape.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__20_S.E._Tape",
"title": null,
"game": null,
"composer": null,
"purpose_class": null,
"source_path": "D:\\audio\\exemplars\\iTunes_Sweep\\SEGA\\Jet Set Radio Future Sega (Original Trac\\20 S.E. Tape.m4a",
"sha256": "a6e69d72d8572a4d9abb6c444a9118cb2998ef5e495e9efe86aa957e6f927c00",
"bytes": 622813,
"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": "2026-08-07T05:37:11+00:00",
"format_induced_limit": "lossy source (aac); high-band timbre figures carry codec artefacts and the card declares it",
"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."
},
"card": {
"duration_and_structure": {
"total_length_s": 2.206,
"section_boundaries_s": [
0.0,
0.952,
2.206
],
"section_count": 2,
"repeat_map": [
{
"section": 0,
"most_like_section": null,
"similarity": 0.0,
"is_repeat": false
},
{
"section": 1,
"most_like_section": 0,
"similarity": 0.7016,
"is_repeat": false
}
],
"novelty_peak_strength": [
1.0
],
"method": "checkerboard-kernel novelty over a chroma+MFCC self-similarity matrix"
},
"tempo_and_time_grammar": {
"tempo_function": {
"baseline_bpm": 161.5,
"curve_times_s": [
0.0,
0.37,
0.74,
1.11,
1.49,
1.86
],
"curve_bpm": [
161.5,
161.5,
161.5,
161.5,
161.5,
161.5
],
"adjustment_events": [],
"dispersion_bpm": 27.91,
"rubato_depth_bpm": 0.0
},
"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": {
"tempo_bpm_global": 161.5,
"tempo_bpm_median_local": 161.5,
"tempo_iqr_bpm": 53.83,
"tempo_stability": 0.0,
"beat_interval_cv": 0.0602
},
"dominant_onset_period_s": 0.1858,
"dominant_onset_period_bpm": 323.0,
"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": 0.8,
"onset_rate_per_s": 10.767
}
},
"tonality": {
"key": "A#",
"mode": "minor",
"windowed_key_agreement": 1.0,
"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": false,
"reason": "only 1 melodic notes extracted"
},
"motif_economy": {
"self_similarity_peak": 0.9692,
"self_similarity_baseline": 0.96,
"self_similarity_lift": 0.0092,
"recurrence_lag_s": 0.464,
"interval_3gram_repetition": 0.0,
"interval_4gram_repetition": 0.0
},
"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",
"low_bass",
"bass",
"low_mid",
"mid",
"upper_mid",
"presence",
"brilliance",
"air",
"ultra"
],
"entry_exit_map": [
{
"lane": "sub",
"band_hz": [
20,
45
],
"entry_s": 0.0,
"exit_s": 1.045,
"active_fraction": 0.4792,
"segments": [
[
0.0,
1.045
]
]
},
{
"lane": "low_bass",
"band_hz": [
45,
90
],
"entry_s": 0.0,
"exit_s": 0.906,
"active_fraction": 0.4167,
"segments": [
[
0.0,
0.906
]
]
},
{
"lane": "bass",
"band_hz": [
90,
180
],
"entry_s": 0.0,
"exit_s": 0.929,
"active_fraction": 0.4271,
"segments": [
[
0.0,
0.929
]
]
},
{
"lane": "low_mid",
"band_hz": [
180,
355
],
"entry_s": 0.0,
"exit_s": 1.022,
"active_fraction": 0.4688,
"segments": [
[
0.0,
1.022
]
]
},
{
"lane": "mid",
"band_hz": [
355,
710
],
"entry_s": 0.0,
"exit_s": 1.068,
"active_fraction": 0.4896,
"segments": [
[
0.0,
1.068
]
]
},
{
"lane": "upper_mid",
"band_hz": [
710,
1400
],
"entry_s": 0.0,
"exit_s": 1.184,
"active_fraction": 0.5417,
"segments": [
[
0.0,
1.184
]
]
},
{
"lane": "presence",
"band_hz": [
1400,
2800
],
"entry_s": 0.0,
"exit_s": 1.138,
"active_fraction": 0.5208,
"segments": [
[
0.0,
1.138
]
]
},
{
"lane": "brilliance",
"band_hz": [
2800,
5600
],
"entry_s": 0.0,
"exit_s": 1.115,
"active_fraction": 0.5104,
"segments": [
[
0.0,
1.115
]
]
},
{
"lane": "air",
"band_hz": [
5600,
11200
],
"entry_s": 0.0,
"exit_s": 1.068,
"active_fraction": 0.4896,
"segments": [
[
0.0,
1.068
]
]
}
],
"interlap_matrix": {
"sub|low_bass": 0.8696,
"sub|bass": 0.8913,
"sub|low_mid": 0.9783,
"sub|mid": 0.9787,
"sub|upper_mid": 0.8846,
"sub|presence": 0.92,
"sub|brilliance": 0.9388,
"sub|air": 0.9787,
"low_bass|bass": 0.9756,
"low_bass|low_mid": 0.8889,
"low_bass|mid": 0.8511,
"low_bass|upper_mid": 0.7692,
"low_bass|presence": 0.8,
"low_bass|brilliance": 0.8163,
"low_bass|air": 0.8511,
"bass|low_mid": 0.9111,
"bass|mid": 0.8723,
"bass|upper_mid": 0.7885,
"bass|presence": 0.82,
"bass|brilliance": 0.8367,
"bass|air": 0.8723,
"low_mid|mid": 0.9574,
"low_mid|upper_mid": 0.8654,
"low_mid|presence": 0.9,
"low_mid|brilliance": 0.9184,
"low_mid|air": 0.9574,
"mid|upper_mid": 0.9038,
"mid|presence": 0.94,
"mid|brilliance": 0.9592,
"mid|air": 1.0,
"upper_mid|presence": 0.9615,
"upper_mid|brilliance": 0.9423,
"upper_mid|air": 0.9038,
"presence|brilliance": 0.98,
"presence|air": 0.94,
"brilliance|air": 0.9592
},
"simultaneity_curve": {
"times_s": [
0.0,
0.186,
0.372,
0.557,
0.743,
0.929,
1.115,
1.3,
1.486,
1.672,
1.858,
2.043
],
"lanes": [
9,
9,
9,
9,
9,
8,
3,
0,
0,
0,
0,
0
],
"max": 9,
"mean": 4.344
},
"register_spacing_octaves": [
1.085,
1.0,
0.99,
0.99,
0.99,
0.99,
1.0,
1.0
]
},
"event_grammar": {
"drops": [
{
"position": 0.2737,
"at_s": 0.604,
"db_delta": -9.48,
"lanes_removed": 1.52,
"bars_held_s": 1.022,
"re_enters_at_s": 1.625
}
],
"raises": [],
"breaks": [
{
"position": 0.7158,
"at_s": 1.579,
"duration_s": 0.627
}
],
"tuttis": [],
"silence_budget": {
"fraction": 0.2917,
"seconds": 0.643,
"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": {
"drops": 1,
"raises": 0,
"breaks": 1,
"tuttis": 0
}
},
"opening_and_flow_law": {
"onset_type": "cold_statement",
"first_sound_at_s": 0.0,
"time_to_hook_s": null,
"time_to_hook_bars": null,
"time_to_full_texture_s": 0.0,
"time_to_full_texture_bars": 0.0,
"flow_curve": {
"definition": "energy = 0.45*density + 0.35*lane-simultaneity + 0.20*register, each normalised to the track's own maximum (section 11.4)",
"times_s": [
0.0,
0.74,
1.49
],
"values": [
0.595,
0.6346,
0.2032
],
"peak_position_normalised": 0.2737
}
},
"complexity_law": {
"available": false,
"reason": "track is under two bars at 161.5 bpm"
},
"texture_and_density": {
"note_rate_per_s": 0.453,
"melodic_salience": 0.0,
"voiced_fraction": 0.0366,
"note_count": 1,
"mean_lanes": 4.344,
"max_lanes": 9
},
"dynamics": {
"dynamic_range_db_p95_minus_p10": 61.96,
"peak_position_normalised": 0.0,
"peak_at_s": 0.0,
"arc_curve_db": [
-4.2,
-17.49,
-46.1
],
"arc_times_s": [
0.0,
0.74,
1.49
]
},
"register": {
"melody_span_semitones": 0.0,
"melody_tessitura_midi": 36.0,
"bass_floor_band": {
"sub": 0.00298,
"low_bass": 0.3965,
"bass": 0.2556,
"low_mid": 0.12948,
"mid": 0.02747,
"upper_mid": 0.02152,
"presence": 0.04636,
"brilliance": 0.07464,
"air": 0.04422,
"ultra": 0.0
},
"octave_band_profile": {
"sub": 0.00298,
"low_bass": 0.3965,
"bass": 0.2556,
"low_mid": 0.12948,
"mid": 0.02747,
"upper_mid": 0.02152,
"presence": 0.04636,
"brilliance": 0.07464,
"air": 0.04422,
"ultra": 0.0
}
},
"cadence_and_ending": {
"loop_seam": {
"measurable": true,
"seam_distance": 0.32859,
"interior_distance_median": 0.04356,
"seam_ratio": 7.543,
"seam_clean": false,
"tail_rms_over_mid": 0.01,
"head_rms_over_mid": 15.3812,
"tail_rms_trend": -0.6753,
"head_rms_trend": -0.8496,
"baked_fade_out": true,
"baked_fade_in": false
},
"ending": "baked_fade_out",
"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": 3208.6,
"spectral_centroid_curve_hz": [
2319.1,
3089.8,
3007.3
],
"spectral_rolloff85_hz_mean": 6441.5,
"spectral_flatness_mean": 0.1001,
"signature_colour": "bright"
}
}
}