My Audio was working ok (apart from DVD playback skipping). I plugged in a pair of USB Logitech V10 speakers and things went wrong!
Amarok no longer plays tracks, it just skips through each one, and Realplayer says that the Audio Device is in use and it can’t play the file.
After I plugged in the speakers the audio was playing through the laptops built in speakers. So I read a tutorial and went to System>Yask>Manage Hardware>Manage Sound. I could see my built in speakers but not the USB speakers. So I added a new item “Generic USB audio”. And that’s when it all went wrong.