On 08/12/2015 10:46 PM, Joe Pfeiffer wrote:
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?
I suspect that your ham radio is VHF--2 meters, or possibly 440MHz,
since you say "when a call comes in."
Therefore, the radio certainly has a squelch circuit. As a ham, you
should be familiar enough with electronics
to find a voltage in the radio that switches level when the squelch is
activated or deactivated. You can
buffer this voltage with a transistor or a digital comparator, and use
it to control the music via a relay.
Hint: squelch circuits usually (but not always) are controlled by the AGC.
--doug, WA2SAY
