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| author | skal <pascal.massimino@gmail.com> | 2026-02-17 16:12:21 +0100 |
|---|---|---|
| committer | skal <pascal.massimino@gmail.com> | 2026-02-17 16:12:21 +0100 |
| commit | 03579c4a33ab3955ff9924a6dcd882fe91dd9aaa (patch) | |
| tree | be458d2ac4bc0d7160be8a18526b4e9157af33a5 /TODO.md | |
| parent | e3f0b002c0998c8553e782273b254869107ffc0f (diff) | |
feat(mq_editor): Phase 1 - MQ extraction and visualization (SPECTRAL_BRUSH_2)
Implement McAulay-Quatieri sinusoidal analysis tool for audio compression.
New files:
- doc/SPECTRAL_BRUSH_2.md: Complete design doc (MQ algorithm, data format, synthesis, roadmap)
- tools/mq_editor/index.html: Web UI (file loader, params, canvas)
- tools/mq_editor/fft.js: Radix-2 Cooley-Tukey FFT (from spectral_editor)
- tools/mq_editor/mq_extract.js: MQ algorithm (peak detection, tracking, bezier fitting)
- tools/mq_editor/viewer.js: Visualization (spectrogram, partials, zoom, axes)
- tools/mq_editor/README.md: Usage and implementation status
Features:
- Load WAV → extract sinusoidal partials → fit cubic bezier curves
- Time-frequency spectrogram with hot colormap (0-16 kHz)
- Horizontal zoom (mousewheel) around mouse position
- Axis ticks with labels (time: seconds, freq: Hz/kHz)
- Mouse tooltip showing time/frequency coordinates
- Real-time adjustable MQ parameters (FFT size, hop, threshold)
Algorithm:
- STFT with Hann windows (2048 FFT, 512 hop)
- Peak detection with parabolic interpolation
- Birth/death/continuation tracking (50 Hz tolerance)
- Cubic bezier fitting (4 control points per trajectory)
Next: Phase 2 (JS synthesizer for audio preview)
handoff(Claude): MQ editor Phase 1 complete. Ready for synthesis implementation.
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