PodTui/tasks/merged-waveform/06-waveform-audio-analysis.md

06. Implement Audio Waveform Analysis

meta: id: merged-waveform-06 feature: merged-waveform priority: P2 depends_on: [] tags: [audio, waveform, analysis]

objective:

• Analyze audio data to extract waveform information
• Create real-time waveform data from audio streams
• Generate waveform data points for visualization

deliverables:

• Audio analysis utility
• Waveform data extraction function
• Integration with audio backend

steps:

1. Research and select audio waveform analysis library (e.g., audiowaveform)
2. Create src/utils/audio-waveform.ts
3. Implement audio data extraction from backend
4. Generate waveform data points (amplitude values)
5. Add sample rate and duration normalization

tests:

• Unit: Test waveform generation from sample audio
• Integration: Test with real audio playback
• Performance: Measure waveform generation overhead

acceptance_criteria:

• Waveform data is generated from audio content
• Data points represent audio amplitude accurately
• Generation works with real-time audio streams

validation:

• Generate waveform from sample MP3 file
• Verify amplitude data matches audio peaks
• Test with different audio formats

notes:

• Consider using ffmpeg or sox for offline analysis
• For real-time: analyze audio chunks during playback
• Waveform resolution: 64-256 data points for TUI display
• Normalize amplitude to 0-1 range