When I play music I send it to an AV amp using a digital out. I have an HDMI connection that has to go through the TV to the amp, and a optical on the motherboard that goes direct to the amp. The optical out is the better choice for music.
The problem I have is that after a random amount of time (usually at least once every 5 - 10 mins) the output device in the PulseAudio volume control changes from HD-Audio Generic Digital Stereo (IEC958) to Unknown output and the sound drops briefly.
It doesn't do this went the output is set to HDMI.
How can I trouble shoot this issue? I'm not sure if it's an Elementary problem, PulseAudio problem, or a hardware fault. Hopefully once I know the problem I can investigate a solution.