[Gregoire]

Since last update 816 audio volume goes up and down without intervention in Livetv/ PVR

Are you saying this is new to 816 (i.e. 815 was fine)?
Based on the list of changes that seems hard to imagine.
Do you have a non-zero amplification (set on OSD/audio settings)?

I have no idea what you just said. But. The problem remained with the volume going up and down and sometimes a stream starts with white noise and loud crackles. Normally I have an idea of where the problem could stem from but I have no clue now.