https://chatgpt.com/c/6ae868d0-2154-83ed-910d-2b3c16580d83 (private)
On a Fairphone 6, a DJI Mic Mini receiver connected via USB-C produces dual mono instead of independent stereo when applications use Android's default AUDIO_SOURCE_MIC.
Selecting AUDIO_SOURCE_UNPROCESSED restores independent left/right channels.
ADB diagnostics show that these audio sources select different Qualcomm processing graphs: Fluence speech processing versus RAW capture.