fix AF-2614
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## Summary by CodeRabbit
- **New Features**
- Improved audio processing with persistent buffered resampling and thread-local caching for smoother and more reliable sample rate conversion.
- **Bug Fixes**
- Enhanced handling of stereo and mono audio input, ensuring accurate channel extraction and upmixing.
- **Refactor**
- Updated internal audio processing logic for better performance and reduced artifacts during audio capture.
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