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cgcardona/heuristics_v2.json

Created February 22, 2026 13:19
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Stori Maestro — MIDI expressiveness heuristics v2: 3,858 lines of velocity curves, timing humanization, CC envelopes, and articulation profiles extracted from real MIDI performances
Raw
heuristics_v2.json
{
"schema_version": 2,
"file_count": 222497,
"expressiveness": {
"density": {
"notes_per_bar": {
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"median": 39.3,
"stdev": 32.381,
"p10": 13.8,
"p25": 23.6,
"p75": 57.1,
"p90": 77.4,
"count": 222497
},
"cc_per_bar": {
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"median": 2.2,
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"p10": 0.1,
"p25": 0.4,
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"count": 222497
}
},
"velocity": {
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"mean_stdev": 15.5
},
"timing": {
"mean_16th_deviation": 0.016,
"median_pct_off_grid": 13.1
},
"cc_breakdown_total": {
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"CC 11 (Expression)": 26278826,
"CC 7 (Volume)": 23447131,
"CC 64 (Sustain Pedal)": 20882202,
"CC 1 (Mod Wheel)": 20033031,
"CC 10 (Pan)": 6465264,
"CC 91 (Reverb)": 2696598,
"CC 93 (Chorus)": 2414867,
"CC 67 (Soft Pedal)": 1873598,
"CC 6 (?)": 1867832,
"CC 121 (?)": 1812053,
"CC 99 (?)": 1618498,
"CC 0 (?)": 1015681,
"CC 74 (Cutoff/Brightness)": 1013918,
"CC 98 (?)": 754091,
"CC 100 (?)": 740718,
"CC 123 (?)": 644217,
"CC 32 (?)": 563289,
"CC 101 (?)": 425133,
"CC 31 (?)": 425072
}
},
"by_role": {
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