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- Filter out "立體聲混音" (Stereo Mix) devices which are not real microphones - Skip the "default" device which may point to Stereo Mix - Prefer "communications" device or devices with "麥克風/microphone" in label - Use exact deviceId constraint for better device selection - Add fallback to preferred constraint if exact fails - Add more detailed console logging for debugging 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>