I was playing Runescape on one monitor when I started tinkering with S1 Demo on the other - noticed that when S1 started, the audio for the game disappeared - OK fair enough, though it would be nice to have both. I was actually just on the Start Page and went no further. When I then shut down S1, the game never got audio back - indeed I had to shut the game down and restart to regain game audio.

I discovered to Release Audio Device in Background setting, so I tried enabling that - it made no difference, as soon as S1 was run, game audio stopped and could only be regained after S1 was shutdown by shutting the game down as well.

It wasn't even a case of the audio coming from the monitor I last clicked on, which would have been OK.