Today it became possible for me to use the install script. Same story -- when starting to play anything, you got a very silent click and then very silent hiss. When you stop the thing that is playing, the hissing stops within 10 seconds... again with a silent click.
Has anybody else experienced this? It didn't occur before I started fiddling with the pulseaudio sound server (namely uninstalling it). Yet when I reinstalled, the problem was there and I can't get rid of it whether you have it installed or not.
Any ideas? I would be keen to try anything that doesn't require reinstalling the system