Building a dual-track audio pipeline on Windows: mic + system audio without joining the call

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Building a dual-track audio pipeline on Windows: mic + system audio without joining the call

How to capture microphone and call audio as separate streams with cpal and WASAPI loopback so a live translator can hear both sides.

How to capture microphone and call audio as separate streams with cpal and WASAPI loopback so a live translator can hear both sides.