MacOS has sometimes troubles with audio.
- Your playback stuck in a loop.
- Your Mac was asleep, your playback does something crazy or wont play properly
- You have clicks and glitches
- Your interface stuck, after connecting it.
- or similar...
Command "KILLAUDIO" will "reset" all audio drivers, which are automatically restarted after some seconds.
It simply kills all drivers, MacOS brings them up again, automatically, no risk to use.