- Replace audioop module (removed in Python 3.13) with NumPy
- Implement _apply_volume() method using NumPy for volume adjustment
- Update RMS calculation in ducking_sound_received() to use NumPy
- Add numpy to requirements.txt
- Add silent flag to CachedItemWrapper for join sounds
- Join sounds now play without channel announcements
- Regular playlist items still respect announce_current_music config
- Update CLAUDE.md to document changes
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Co-Authored-By: Claude <noreply@anthropic.com>
