Added real-time multi-track audio mixing and playback:
**useMultiTrackPlayer Hook:**
- Real-time multi-track audio mixing with Web Audio API
- Synchronized playback across all tracks
- Dynamic gain control respecting solo/mute states
- Per-track panning with constant power panning
- Seek functionality with automatic resume
- Playback position tracking with requestAnimationFrame
- Automatic duration calculation from longest track
- Clean resource management and cleanup
**Features:**
- ✅ Play/Pause/Stop controls for multi-track
- ✅ Solo/Mute handling (if any track is soloed, only soloed tracks play)
- ✅ Per-track volume control (0-1 range)
- ✅ Per-track pan control (-1 left to +1 right)
- ✅ Real-time parameter updates during playback
- ✅ Seamless seek with playback state preservation
- ✅ Automatic stop when reaching end of longest track
**Audio Graph Architecture:**
For each track: BufferSource → GainNode → StereoPannerNode → Destination
The mixer applies:
- Volume attenuation based on track volume setting
- Solo/Mute logic (getTrackGain utility)
- Constant power panning for smooth stereo positioning
Next: Integrate multi-track UI into AudioEditor
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
Sebastian Krüger
d566a86c58