music/exemplars/formula_cards/UNMATCHED__72_Good_-By_Friends_Sfc_Version_.json
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{
"position_s": 2.23,
"duration_s": 14.49,
"delta_bpm": -63.13,
"shape": "step"
},
{
"position_s": 17.28,
"duration_s": 22.45,
"delta_bpm": -69.49,
"shape": "step"
},
{
"position_s": 40.03,
"duration_s": 3.69,
"delta_bpm": 12.13,
"shape": "step"
},
{
"position_s": 44.05,
"duration_s": 9.64,
"delta_bpm": -70.64,
"shape": "step"
},
{
"position_s": 54.01,
"duration_s": 10.22,
"delta_bpm": 12.25,
"shape": "step"
},
{
"position_s": 64.55,
"duration_s": 5.06,
"delta_bpm": -60.46,
"shape": "step"
},
{
"position_s": 69.92,
"duration_s": 2.41,
"delta_bpm": 12.09,
"shape": "step"
},
{
"position_s": 72.66,
"duration_s": 5.09,
"delta_bpm": -59.93,
"shape": "step"
},
{
"position_s": 78.11,
"duration_s": 5.8,
"delta_bpm": 11.84,
"shape": "step"
},
{
"position_s": 84.24,
"duration_s": 14.7,
"delta_bpm": -71.98,
"shape": "step"
},
{
"position_s": 100.47,
"duration_s": 22.48,
"delta_bpm": -71.87,
"shape": "step"
},
{
"position_s": 123.67,
"duration_s": 30.33,
"delta_bpm": -65.74,
"shape": "step"
},
{
"position_s": 154.32,
"duration_s": 67.34,
"delta_bpm": 12.3,
"shape": "step"
}
],
"dispersion_bpm": 45.792,
"rubato_depth_bpm": 95.467
},
"global_bpm": 92.29,
"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": 92.29,
"tempo_bpm_median_local": 99.38,
"tempo_iqr_bpm": 30.76,
"tempo_stability": 0.0,
"beat_interval_cv": 0.0322
},
"dominant_onset_period_s": 0.6734,
"dominant_onset_period_bpm": 89.1,
"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": 0.6,
"onset_rate_per_s": 10.768
}
},
"tonality": {
"key": "A",
"mode": "major",
"windowed_key_agreement": 0.3571,
"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": 0.546,
"onset_bars": 0.39,
"pitch_contour": "DDUDUUDUU-U-D-D",
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1,
2,
5,
7,
9,
12,
19,
24
],
"intervals": [
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-2.0,
9.0,
-12.0,
1.0,
9.0,
-12.0,
2.0,
5.0,
0.0,
19.0,
0.0,
-19.0,
0.0,
-7.0
],
"range_semitones": 31.0,
"distinctive_deviation": {
"largest_interval_semitones": -24.0,
"at_note_index": 1,
"is_licensed_leap": true
}
},
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"self_similarity_lift": 0.2815,
"recurrence_lag_s": 0.464,
"interval_3gram_repetition": 0.4093,
"interval_4gram_repetition": 0.275
},
"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.",
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"ultra"
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},
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"spectral_flatness_mean": 0.00457,
"signature_colour": "warm"
}
}
}