[LAU] How can I detect whether JACK or ALSA clients are using an audio gear?

crocket crockabiscuit at gmail.com
Fri Mar 29 03:45:40 CET 2019


Can I detect actual clients over zita-njbridge or zita-ajbridge?

On Fri, Mar 29, 2019 at 8:25 AM crocket <crockabiscuit at gmail.com> wrote:

> My Raspberry Pi can turn audio gears on and off via relays.
> When my desktop starts using its speakers, I want it to tell Raspberry Pi
> to turn on the speakers via a relay.
> When nothing has used the speakers for a minute, I want it to tell
> Raspberry Pi to turn off the speakers.
>
> I can do the same for a USB microphone. A USB microphone can be turned on
> and off by uhubctl.
>
> Does ALSA have a callback API that I hook into? Does jack have it?
>
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