Here is the save file. The voices will return after setting back from 5.1 to stereo in the Windows Speakers settings. Currently using Xfi Titanium PCI with z5500. The bug havent after the sneaking mission in Loredos base. It happened right at the moment when you were peeking into the window.

https://rapidshare.com/files/3651593270/Witcher.zip

My sounds and voice don't actually disappear, they are still there but they are so low most of the time that I can't hear them (please no one mention volume :<).

There is something wrong with the interpretaion of the sound streams, the channels don't work as they should.. maybe they are reversed or there's anothewr problem I'm not sure but they certain are out of sync.

FYI CDP... THREE sound options would have rendered this a non issue... music, voice and sound effects... having sound effects and voices on the same option was a really, stupidly dumb thing to do.. music you can turn down, but you can't compensate for the low voices as you'll just end up with blaring sound effects... pissing around with the sound every couple of seconds is NOT a reasonable thing to have to do.