PulseAudio
From Leo's Notes
Last edited on 14 June 2020, at 22:02.
PulseAudio is a sound server.
Playback Audio In to Audio Out
To playback audio input, load the loopback module.
pactl load-module module-loopback latency_msec=1
There will be a noticeable latency and some questionable sound quality doing this.