music/exemplars/formula_cards/UNMATCHED__37_Fossil_Field___.json
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"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": 112.35,
"tempo_bpm_median_local": 112.35,
"tempo_iqr_bpm": 4.68,
"tempo_stability": 0.8333,
"beat_interval_cv": 0.0446
},
"dominant_onset_period_s": 2.9025,
"dominant_onset_period_bpm": 20.67,
"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": 0.594,
"onset_rate_per_s": 10.769
}
},
"tonality": {
"key": "C",
"mode": "major",
"windowed_key_agreement": 0.7917,
"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": 0.511,
"onset_bars": 0.14,
"pitch_contour": "---------------",
"interval_vocabulary_semitones": [
0
],
"intervals": [
0.0,
-0.33,
0.5,
-0.17,
0.33,
0.0,
-0.33,
0.0,
0.0,
-0.33,
0.0,
0.33,
0.0,
0.33,
0.0
],
"range_semitones": 0.67,
"distinctive_deviation": {
"largest_interval_semitones": 0.5,
"at_note_index": 3,
"is_licensed_leap": false
}
},
"motif_economy": {
"self_similarity_peak": 0.9556,
"self_similarity_baseline": 0.8523,
"self_similarity_lift": 0.1033,
"recurrence_lag_s": 2.926,
"interval_3gram_repetition": 0.7026,
"interval_4gram_repetition": 0.5775
},
"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": 2.717,
"exit_s": 186.456,
"active_fraction": 0.7386,
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8.545,
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12.005,
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13.839,
16.672
],
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17.322,
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],
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19.249,
21.014
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21.618,
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23.057,
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25.496,
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26.958,
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28.979,
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30.906,
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31.811,
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34.226,
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37.152,
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40.612,
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49.273,
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55.078,
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63.901,
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66.223,
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72.052,
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95.341,
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96.781,
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98.754,
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101.146,
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107.462,
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108.925,
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113.313,
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114.753,
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],
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119.095,
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],
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120.419,
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122.114,
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],
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124.923,
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],
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127.106,
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127.919,
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130.728,
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133.747,
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],
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136.557,
137.3
],
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],
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142.385,
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],
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143.685,
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144.521,
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],
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146.657,
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],
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148.19,
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],
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149.56,
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],
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151.626,
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],
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153.484,
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],
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155.504,
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156.967,
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],
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159.289,
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],
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161.332,
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162.795,
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165.14,
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168.6,
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],
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170.551,
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],
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172.919,
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177.331,
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180.233,
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],
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182.161,
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],
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183.089,
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],
[
185.504,
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]
]
},
{
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45,
90
],
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"active_fraction": 0.653,
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],
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],
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171.595,
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],
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],
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177.4,
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],
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],
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]
]
},
{
"lane": "bass",
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90,
180
],
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"active_fraction": 0.8377,
"segments": [
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],
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147.447,
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],
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148.12,
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],
[
151.626,
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]
]
},
{
"lane": "low_mid",
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180,
355
],
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]
]
},
{
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],
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159.8,
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],
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]
]
},
{
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],
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165.071,
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167.068,
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178.701,
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],
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182.532,
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],
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]
]
},
{
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],
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],
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],
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184.529,
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]
]
},
{
"lane": "brilliance",
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5600
],
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23.011,
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30.72,
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]
},
{
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"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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}
}