I'm reasonably confident there must be a better place to post this than this newsgroup, so answers telling me where to look will be just as welcome as any that address the question! I'm a Debian user, so this is where I'm trying first....
Is there a pulseaudio module that will detect when an audio source isn't silent, and mute other sources in that cases? It may be more clear if I describe my particular desire use case. I have a ham radio, whose audio output I can plug into my sound card input. I'd like to be listening to music, but when a call comes in on the radio have it mute any other audio. Any thoughts?