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- Fundamental f0 always synthesized; harmonics added at n*freq_mult
- decay^n amplitude rolloff per harmonic (capped at 0.90)
- Resonator mode also expanded across harmonics (per-harmonic y1/y2 state)
- UI: h.decay, h.freq (default 2.0), jitter, spread↑/↓ params
- Viewer: faint dotted harmonic bands with spread visualization
- Default freq_mult=2.0 (natural harmonic series)
handoff(Gemini): harmonics model complete, ready for next task
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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handoff(Gemini): key bindings updated in app.js and README.md
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Each loadAudioBuffer() was creating a new SpectrogramViewer without
removing the previous one's canvas event listeners. Old viewers would
fire on every mouse event, rendering stale spectrogram data and calling
editor.onPartialSelect() with out-of-range indices (hiding the amp panel).
Fix: store handlers as named instance properties, add destroy() to remove
them, and call destroy() before creating a new viewer.
handoff(Claude): bug fix only, no behaviour change
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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- P1/P2 in amp editor now draggable horizontally; t0<t1<t2<t3 enforced
- Add clamp() to utils.js; replace all Math.max/min clamping patterns
- Cursor hints: move for P1/P2, ns-resize for P0/P3
- Remove test_fft.html
- Docs: Delete key, style.css/utils.js in architecture, bezier editor section
handoff(Claude): inner control points done, clamp() adopted everywhere
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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- refreshPartialsView(selectIdx) consolidates editor+viewer sync (5 call sites)
- playOriginal() replaces inline play button logic; Digit2 calls it directly
- autoSpreadAll() now called after extractPartials via named function
handoff(Claude): factored common button actions in app.js
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debug button
- 'Delete'/'Backspace' key deletes the currently selected partial
- Show 'Del' hint on Delete button in side panel
- Remove 'Test WAV' button and validateTestWAVPeaks() debug code
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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- synthesizeMQ output trimmed to [t_start-50ms, t_end+50ms] so playback
starts immediately at the partial instead of t=0
- Extract synth+trim logic into getAudioBuffer(partials, margin=0)
- Stack params vertically in dropdown (grid layout)
handoff(Claude): partial playback and CSS param layout fixes
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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- Move all styles from index.html <style> block to style.css
- Merge duplicate :focus rules; add canvas-col, canvas-wrap, amp-edit-header, slider-val classes
- Move params (Hop/Threshold/Prominence/Birth/Death/Phase Wt/Min Len) into ⚙ Params dropdown
- Relocate Keep slider to bottom-left canvas overlay
handoff(Claude): UI consolidation complete
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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trackIsoContour() follows constant energy level through STFT frames
instead of peaks. Useful for broad bass areas where peak detector finds
nothing. Preview in cyan, auto-detects spread on commit (naturally large).
Toggle: ≋ Contour button or C key. Mutually exclusive with ⊕ Explore.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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Pre-compute peak frames after STFT cache is built, so trackFromSeed
works without requiring Extract Partials first.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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Hover to preview a tracked partial from mouse position (peak-snapped,
forward+backward MQ tracking). Click to commit. Toggle with ⊕ Explore
button or X key. Escape exits explore mode.
handoff(Gemini): explore mode added in mq_extract.trackFromSeed + viewer.js/app.js
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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- '+ Partial' button (N key): insert 440Hz/max-amp partial at front
- Undo/Redo buttons (Ctrl+Z/Y): JSON snapshot stack, 50 levels
- Hooks in delete, mute, curve edits, amp drag, freq drag
handoff(Gemini): undo/redo + new-partial added to mq_editor
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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Extract synth UI params into reusable getSynthParams(). Add Digit3 shortcut
to synthesize and play only the currently selected partial.
handoff(Claude): getSynthParams() now shared by playSynthesized() and Digit3 handler.
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- utils.js (new): evalBezier (robust), getCanvasCoords, buildBandPoints
- app.js (new): extract ~450-line inline script from index.html
- editor.js: generalize _makeJogSlider(inp, options) with onUpdate cb,
eliminate 50-line inline resonator jog duplication, use getCanvasCoords
- mq_extract.js: extract findBestPeak(), replace two identical loop bodies
- viewer.js: remove duplicate evalBezier, use getCanvasCoords/buildBandPoints
- mq_synth.js: remove duplicate evalBezier
- index.html: inline script removed, load order: utils→fft→extract→synth→viewer→editor→app
handoff(Claude): mq_editor refactor complete — no logic changes, browser-ready.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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