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Fixed three issues reported during testing:
1. Procedural audio now audible:
- Added AMPLITUDE_SCALE=10.0 to match DCT coefficient magnitudes
- Amplitude range 0-1 from Y-position now scaled to proper spectral levels
2. Procedural spectrogram now visible:
- Each curve rendered separately with its own color
- Normalized intensity calculation (specValue / 10.0)
- Only draw pixels with intensity > 0.01 for performance
3. Color-coded curves:
- Each curve assigned unique color from palette (8 colors cycling)
- Colors: Blue, Green, Orange, Purple, Cyan, Brown, Pink, Gold
- Control points and paths use curve color
- Curve list shows color indicator dot
- Procedural spectrogram uses curve colors for easy tracking
Visual improvements:
- Selected curves have thicker stroke (3px vs 2px)
- Each curve contribution visible in separate color
- Color dots in sidebar for quick identification
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
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Fixed 'Identifier source has already been declared' error at line 935.
Bug: Function parameter 'source' (string: 'procedural' or 'original')
conflicted with local AudioBufferSourceNode variable.
Fix: Renamed local variable to 'bufferSource' for clarity.
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
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Implement web-based editor for procedural audio tracing.
New Files:
- tools/spectral_editor/index.html - Main UI structure
- tools/spectral_editor/style.css - VSCode-inspired dark theme
- tools/spectral_editor/script.js - Editor logic (~1200 lines)
- tools/spectral_editor/dct.js - IDCT/DCT implementation (reused)
- tools/spectral_editor/README.md - Complete user guide
Features:
- Dual-layer canvas (reference + procedural spectrograms)
- Bezier curve editor (click to place, drag to adjust, right-click to delete)
- Profile controls (Gaussian sigma slider)
- Real-time audio playback (Key 1=procedural, Key 2=original, Space=stop)
- Undo/Redo system (50-action history with snapshots)
- File I/O:
- Load .wav/.spec files (FFT/STFT or binary parser)
- Save procedural_params.txt (human-readable, re-editable)
- Generate C++ code (copy-paste ready for runtime)
- Keyboard shortcuts (Ctrl+Z/Shift+Z, Ctrl+S/Shift+S, Ctrl+O, ?)
- Help modal with shortcut reference
Technical:
- Pure HTML/CSS/JS (no dependencies)
- Web Audio API for playback (32 kHz sample rate)
- Canvas 2D for visualization (log-scale frequency)
- Linear Bezier interpolation matching C++ runtime
- IDCT with overlap-add synthesis
Next: Phase 3 (currently integrated in Phase 2)
- File loading already implemented
- Export already implemented
- Ready for user testing!
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
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