music/exemplars/formula_cards/EX_007.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": "EX_007",
"title": "Frog's Theme",
"game": "Chrono Trigger",
"composer": "Yasunori Mitsuda",
"purpose_class": "TITLE_CHARACTER",
"source_path": "D:\\audio\\exemplars\\iTunes_Sweep\\Yasunori Mitsuda\\Chrono Trigger (Original Soundtrack) [DS\\1-19 Frog's Theme.m4a",
"sha256": "af8cb5e8ebd1e64ee3770ee28764af8d164258f8bf876dabbd96eb3a49a45eac",
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"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": "2026-08-07T12:07:14+00:00",
"format_induced_limit": "lossy source (aac); high-band timbre figures carry codec artefacts and the card declares it",
"control": {
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"controls_total": 31,
"ran_at": "2026-08-07T12:06:10+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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"shape": "step"
}
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},
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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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"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."
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"modulation_note": "Windowed key agreement below ~0.7 is the modulation signal at rung 1; a pivot-chord map needs symbolic transcription (rung 2)."
},
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"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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0.9122,
0.9838,
0.9734,
0.916,
0.9256,
0.8315,
0.3547,
0.0633,
0.0477
],
"definition": "lane count + 4*harmonic change rate + 0.6*onset strength + 0.4*register span, per bar, normalised to the track's own maximum (section 11.6)",
"step_map": [
{
"bar": 39,
"at_s": 76.07,
"delta": -0.477,
"at_section_boundary": false
},
{
"bar": 40,
"at_s": 78.02,
"delta": -0.291,
"at_section_boundary": false
}
],
"steps_at_section_boundaries": 0,
"steps_total": 2,
"boundary_step_share": 0.0,
"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."
},
"texture_and_density": {
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"melodic_salience": 0.0,
"voiced_fraction": 0.0285,
"note_count": 13,
"mean_lanes": 7.695,
"max_lanes": 9
},
"dynamics": {
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"peak_at_s": 22.965,
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-30.19,
-32.66,
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-150.77
],
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0.0,
0.74,
1.49,
2.23,
2.97,
3.72,
4.46,
5.2,
5.94,
6.69,
7.43,
8.17,
8.92,
9.66,
10.4,
11.15,
11.89,
12.63,
13.37,
14.12,
14.86,
15.6,
16.35,
17.09,
17.83,
18.58,
19.32,
20.06,
20.81,
21.55,
22.29,
23.03,
23.78,
24.52,
25.26,
26.01,
26.75,
27.49,
28.24,
28.98,
29.72,
30.46,
31.21,
31.95,
32.69,
33.44,
34.18,
34.92,
35.67,
36.41,
37.15,
37.89,
38.64,
39.38,
40.12,
40.87,
41.61,
42.35,
43.1,
43.84,
44.58,
45.33,
46.07,
46.81,
47.55,
48.3,
49.04,
49.78,
50.53,
51.27,
52.01,
52.76,
53.5,
54.24,
54.98,
55.73,
56.47,
57.21,
57.96,
58.7,
59.44,
60.19,
60.93,
61.67,
62.42,
63.16,
63.9,
64.64,
65.39,
66.13,
66.87,
67.62,
68.36,
69.1,
69.85,
70.59,
71.33,
72.07,
72.82,
73.56,
74.3,
75.05,
75.79,
76.53,
77.28,
78.02,
78.76,
79.51,
80.25,
80.99,
81.73,
82.48,
83.22
]
},
"register": {
"melody_span_semitones": 50.67,
"melody_tessitura_midi": 44.33,
"bass_floor_band": {
"sub": 0.00037,
"low_bass": 0.02649,
"bass": 0.13669,
"low_mid": 0.07667,
"mid": 0.09498,
"upper_mid": 0.22933,
"presence": 0.33695,
"brilliance": 0.08794,
"air": 0.01054,
"ultra": 0.0
},
"octave_band_profile": {
"sub": 0.00037,
"low_bass": 0.02649,
"bass": 0.13669,
"low_mid": 0.07667,
"mid": 0.09498,
"upper_mid": 0.22933,
"presence": 0.33695,
"brilliance": 0.08794,
"air": 0.01054,
"ultra": 0.0
}
},
"cadence_and_ending": {
"loop_seam": {
"measurable": true,
"seam_distance": 1.0,
"interior_distance_median": 0.08051,
"seam_ratio": 12.421,
"seam_clean": false,
"tail_rms_over_mid": 0.0,
"head_rms_over_mid": 0.0,
"tail_rms_trend": 0.0,
"head_rms_trend": 0.7951,
"baked_fade_out": false,
"baked_fade_in": true
},
"ending": "through_or_loop",
"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": 2254.5,
"spectral_centroid_curve_hz": [
0.0,
1481.4,
2317.1,
2938.1,
2203.1,
2927.9,
1694.9,
2391.3,
2278.2,
1340.3,
2975.4,
2064.1,
2142.2,
2287.9,
2051.3,
2597.4,
2781.5,
2312.7,
2971.9,
2214.2,
2709.6,
2603.8,
2541.6,
2057.2,
2171.9,
2318.1,
2073.2,
2060.2,
2426.1,
2189.9,
2113.5,
2529.9,
2270.0,
2174.0,
2280.1,
1895.9,
2926.9,
2644.6,
2489.0,
2295.0,
2058.5,
2468.9,
3404.8,
2496.4,
1960.8,
2257.2,
2623.9,
2422.9,
1138.8,
1469.7,
2430.9,
2306.1,
2314.7,
1728.6,
2060.4,
2736.2,
2308.8,
2156.8,
2367.3,
2351.4,
2205.9,
1982.5,
2507.4,
2867.5,
2387.5,
2755.8,
2541.0,
1905.9,
2764.6,
2135.3,
1712.6,
1896.7,
2216.4,
2308.1,
2772.1,
2276.6,
2740.7,
2225.5,
2691.1,
2392.4,
2180.9,
2686.0,
2171.1,
1385.3,
2605.0,
2010.6,
2522.4,
1905.5,
2152.8,
2986.4,
1893.5,
2614.9,
1708.3,
2246.7,
2726.4,
1991.1,
1581.3,
2348.3,
2356.3,
2282.9,
1939.1,
2401.4,
3017.7,
2078.3,
3181.6,
2387.4,
2203.8,
2509.4,
2157.3,
2997.6,
2129.2,
0.0,
0.0
],
"spectral_rolloff85_hz_mean": 4496.8,
"spectral_flatness_mean": 0.03638,
"signature_colour": "warm"
}
}
}