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- Right panel with synthesis checkboxes (integrate phase, disable jitter, disable spread)
- Style file chooser as button; show filename next to page title
- Second backward pass in extractPartials to recover partial onsets
- Cursor line drawn on overlay canvas (no full redraw on mousemove)
handoff(Claude): UI + algo improvements complete
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audio
- Fix incoherent per-sample jitter/spread: seed by partial index only
- Fix || fallback for zero-valued params (use != null checks)
- Phase integration: accumulator (2π*f/SR per sample) replaces 2π*f*t
- Add 'Integrate phase' checkbox to toggle between modes
- Revert Catmull-Rom back to simple bezier (1/3, 2/3 sample points)
- Remove all debug logging, clean up trackPartials, fitBezier
handoff(Gemini): dual-sine test validates full MQ pipeline (extract→track→synth).
Next: real audio loading and partial detection improvements.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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- evalBezier: guard dt<=0 to avoid NaN on degenerate curves
- fitBezier: replace nearest-neighbor control points with Catmull-Rom
tangents (Hermite->Bezier), curve now passes through endpoints
- key 'a': toggle mini-spectrum between original and synth FFT
handoff(Claude): bezier fix + synth FFT comparison
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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Phase 2 - JS Synthesizer:
- Created mq_synth.js with replica oscillator bank
- Bezier curve evaluation (cubic De Casteljau algorithm)
- Replica synthesis: frequency spread, amplitude decay, phase jitter
- PCM buffer generation from extracted MQ partials
- Normalization to prevent clipping
- Key '1' plays synthesized audio, key '2' plays original
- Playback comparison with animated playhead
STFT Cache Optimization:
- Created STFTCache class in fft.js for pre-computed windowed FFT frames
- Clean interface: getFFT(t), getMagnitudeDB(t, freq), setHopSize()
- Pre-computes all frames on WAV load (eliminates redundant FFT calls)
- Dynamic cache update when hop size changes
- Shared across spectrogram, tooltip, and mini-spectrum viewer
- Significant performance improvement
Mini-Spectrum Viewer:
- Bottom-right overlay (200x100) matching spectral_editor style
- Real-time FFT display at playhead or mouse position
- 100-bar visualization with cyan-to-yellow gradient
- Updates during playback or mouse hover
Files:
- tools/mq_editor/mq_synth.js (new)
- tools/mq_editor/fft.js (STFTCache class added)
- tools/mq_editor/index.html (synthesis playback, cache integration)
- tools/mq_editor/viewer.js (cache-based rendering, spectrum viewer)
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
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