nx-btred is a Bluetooth audio driver/redirector for Switch.
It uses the audrec:u service to record game audio, and then outputs it on the new audio bluetooth driver introduced in firmware version 12.0.0.
- Install firmware 12.0.0+.
- Install latest Atmosphere.
- Install latest MissionControl.
- Download nx-btred and unzip to your SD card.
- Enter the homebrew menu.
- Launch the btpair application.
- Press X to scan.
- Select your headphones and click A.
- Wait for it to pair.
- Enjoy!
Due to a limitation of the audrec:u service, only games audio can be recorded (not the system applets).
Thanks to ndeadly, SciresM, yellows8 and the rest of the Switchbrew crowd