<![CDATA[Execute script (GPIO Relay) based on if sound is being played]]>Hi guys, I want to monitor if audio is being played, e.g:

cat /proc/asound/card*/pcm*/sub*/status

And if any status contains running I want to execute a script (in my case turn on the amplifier). I want a simple solution and initially I thought it might be possible with udev or python or bash. Does any of you have a great and easy idea?

Thanks

]]>https://forum.magicmirror.builders/topic/8914/execute-script-gpio-relay-based-on-if-sound-is-being-playedRSS for NodeWed, 17 Jun 2026 12:50:48 GMTSun, 14 Oct 2018 12:47:12 GMT60<![CDATA[Reply to Execute script (GPIO Relay) based on if sound is being played on Sun, 14 Oct 2018 13:37:31 GMT]]>while sleep 1; do if grep -q 'RUNNING' '/proc/asound/card0/pcm0p/sub0/status'; then echo "Running!" else echo "Not Running!" fi done

this seems to work but the amplifier produces a too loud cracking sound when switching on, I have two spare relais und my MagicMirror, I will hook up the speakers to those and try again.

]]>https://forum.magicmirror.builders/post/45389https://forum.magicmirror.builders/post/45389Sun, 14 Oct 2018 13:37:31 GMT