music/exemplars/formula_cards/UNMATCHED__09_Impure_Spectrum.json
{
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"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__09_Impure_Spectrum",
"title": null,
"game": null,
"composer": null,
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"decoder": "ffmpeg.exe :: ffmpeg version 9.0-full_build-www.gyan.dev Copyright (c) 2000-2026 the FFmpeg developers",
"measured_at": "2026-08-07T04:54:15+00:00",
"format_induced_limit": "lossy source (aac); high-band timbre figures carry codec artefacts and the card declares it",
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"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."
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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.",
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"position": 0.8467,
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"end_s": 89.002,
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"position": 0.9322,
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"end_s": 97.826,
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{
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{
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}
],
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}
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"delta": 0.191,
"at_section_boundary": true
},
{
"bar": 2,
"at_s": 3.16,
"delta": 0.238,
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},
{
"bar": 3,
"at_s": 4.74,
"delta": 0.222,
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},
{
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"at_s": 17.37,
"delta": -0.203,
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},
{
"bar": 12,
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"delta": -0.293,
"at_section_boundary": true
},
{
"bar": 25,
"at_s": 39.47,
"delta": -0.22,
"at_section_boundary": false
},
{
"bar": 28,
"at_s": 44.21,
"delta": 0.205,
"at_section_boundary": true
},
{
"bar": 30,
"at_s": 47.37,
"delta": -0.196,
"at_section_boundary": false
},
{
"bar": 31,
"at_s": 48.95,
"delta": -0.204,
"at_section_boundary": false
},
{
"bar": 38,
"at_s": 60.0,
"delta": 0.209,
"at_section_boundary": false
},
{
"bar": 39,
"at_s": 61.58,
"delta": 0.512,
"at_section_boundary": true
},
{
"bar": 44,
"at_s": 69.47,
"delta": -0.267,
"at_section_boundary": false
},
{
"bar": 48,
"at_s": 75.79,
"delta": -0.248,
"at_section_boundary": false
},
{
"bar": 49,
"at_s": 77.37,
"delta": -0.164,
"at_section_boundary": false
},
{
"bar": 50,
"at_s": 78.95,
"delta": 0.419,
"at_section_boundary": false
},
{
"bar": 51,
"at_s": 80.53,
"delta": 0.183,
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},
{
"bar": 53,
"at_s": 83.68,
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"at_section_boundary": false
},
{
"bar": 54,
"at_s": 85.26,
"delta": -0.196,
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},
{
"bar": 63,
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"delta": -0.238,
"at_section_boundary": true
}
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"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."
},
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"note_count": 131,
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"melody_tessitura_midi": 38.33,
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"bass": 0.19828,
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"air": 7e-05,
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"bass": 0.19828,
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"air": 7e-05,
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},
"cadence_and_ending": {
"loop_seam": {
"measurable": true,
"seam_distance": 0.6588,
"interior_distance_median": 0.00701,
"seam_ratio": 93.923,
"seam_clean": false,
"tail_rms_over_mid": 0.0008,
"head_rms_over_mid": 0.0041,
"tail_rms_trend": -0.9668,
"head_rms_trend": 0.9694,
"baked_fade_out": true,
"baked_fade_in": true
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"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."
},
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784.7,
847.8,
901.2,
876.5,
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1156.9,
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1495.2,
1423.9,
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772.5,
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400.1,
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374.7,
461.9,
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340.7,
392.0,
326.4,
429.2,
401.7,
324.7,
511.2,
248.5,
367.1,
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296.5,
322.3,
219.0,
268.0,
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392.4,
375.5,
286.2,
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243.0,
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269.0,
368.0,
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338.5,
307.5,
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324.5,
249.1,
299.4,
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471.8,
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794.2,
843.0,
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620.1,
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642.0,
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785.9,
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1006.2,
1095.3,
782.3,
496.6,
492.1,
452.7,
493.1,
458.8,
561.8,
842.7,
768.0,
1234.2,
1167.3,
1022.6,
1299.5,
753.6,
876.5,
415.3,
530.7,
573.0,
534.3,
926.0,
366.1,
521.6,
724.3,
338.2,
778.3,
328.6,
526.0,
192.2,
150.8,
267.9,
71.9,
90.4,
67.3,
60.8,
108.3,
176.6,
387.8,
750.5,
864.2,
638.2,
640.2
],
"spectral_rolloff85_hz_mean": 1338.9,
"spectral_flatness_mean": 0.00078,
"signature_colour": "dark"
}
}
}