nvrl
1479854503
scripts/fatness.py measures momentary bass fatness of rendered files with the final model from Schmedeke's dissertation (section 5.4.3, adjusted R² .773): two logistic terms on the C-weighted level and the MPEG-7 harmonic ratio below 200 Hz, over 50 ms windows, after normalising to -23 LUFS (BS.1770 integrated, gated). The thesis does not state the dB(C) of its reference, so --offset maps dBFS to dB(C) (default 100). On the seven Devath references, drops read 4-6, breakdowns near 0, and kick gaps show as 50 ms dips; SPL<200 medians of 67-69 dB(C) suggest the offset may be 2-5 dB low. Also corrects docs/ideas.md, which quoted the thesis's preliminary linear model instead of the final one.
24 lines
746 B
Markdown
24 lines
746 B
Markdown
# Local listening references
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Put reference audio under `references/devath/`. The seven supplied FLAC files
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have been moved there; audio files remain ignored by Git and are not packaged.
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From the repository root, run:
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```sh
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python scripts/analyze-references.py
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```
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Measurements are written to `docs/rivet/research/measurements/`.
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The script requires ffmpeg, NumPy, and Matplotlib. It measures level, spectral
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attacks, and texture changes; it does not transcribe notes or infer emotion.
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For the momentary bass fatness lane (Schmedeke's model, see `docs/ideas.md`):
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```sh
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python scripts/fatness.py --output target/fatness
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```
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It writes `fatness.png` and `fatness.json`; `--offset` sets the assumed dB(C)
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of a 0 dBFS RMS signal (default 100).
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