strange situation for me, I am using Pi and Pi2 with a Harman Kardon receiver, for few weeks now my system sound works fine with passthrough enabled in 5.1 config, DD and DTS, but its not working anymore in 2 channel. Every time I try to play a 2.0 channel source there is no sound.
I have to mention, also when problem start to occur it appeared on kodi main screen (top right corner) a red silent symbol! I have it all the time now…as I said earlier 5.1 sources sound ok, for 2.0 sources there is no sound.
Any idea why this is happening? What could be the fix? Thank you.