Sebastian Krüger 37f910acb7 feat: complete Phase 11.4 - comprehensive audio file import ...

Implemented advanced audio import capabilities:

**Import Features:**
- Support for WAV, MP3, OGG, FLAC, M4A, AIFF formats
- Sample rate conversion using OfflineAudioContext
- Stereo to mono conversion (equal channel mixing)
- Normalize on import option (99% peak with 1% headroom)
- Comprehensive codec detection from MIME types and extensions

**API Enhancements:**
- ImportOptions interface (convertToMono, targetSampleRate, normalizeOnImport)
- importAudioFile() function returning buffer + metadata
- AudioFileInfo with AudioMetadata (codec, duration, channels, sample rate, file size)
- Enhanced decodeAudioFile() with optional import transformations

**UI Components:**
- ImportDialog component with import settings controls
- Sample rate selector (44.1kHz - 192kHz)
- Checkbox options for mono conversion and normalization
- File info display (original sample rate and channels)
- Updated FileUpload to show AIFF support

**Technical Implementation:**
- Offline resampling for quality preservation
- Equal-power channel mixing for stereo-to-mono
- Peak detection across all channels
- Metadata extraction with codec identification

Phase 11 (Export & Import) now complete!

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

2025-11-19 08:25:36 +01:00

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