https://soundpipe.app/
SoundPipe - Route audio between apps on your Mac.
SoundPipe creates virtual audio devices on your Mac so you can send audio from any app, or your microphone, to any other app. Per-channel volume, any sample...
soundpiperouteaudioappsmac
https://paulbatchelor.github.io/proj/soundpipe.html
Soundpipe
soundpipe