no sound output

[Arwen]

One issue is that if you use an external HDMI connector, apps start using that, even though the default in audio settings is heaphones or speakers. This is not a pbpro issue as such, the same happens sometimes on desktop Linux. The difference is that the audio settings widget has an option to switch audiostreamer per app to a different output. The pbpro mixer does not have it, maybe stretch is too old to have this functionality.

I managed to fix this once for Chromium but I can't remember the exact steps I took, so now Youtube sound works on Chromium but not on Firefox.

Thank you for the reminder. I've add that issue to the sound troubleshooting section. It actually does not mater if it's HDMI or DisplayPort, the audio can be passed through either.