http://bugs.winehq.org/show_bug.cgi?id=27883
--- Comment #9 from Cùran debian@carbon-project.org 2011-07-25 16:35:51 CDT --- In reply to comment #8: Great, disabling OSS in winecfg got the sound back! No idea though, why both are enabled when installed. I have both installed, because in the past some (older) games preferred the OSS driver, maybe it's time to get rid of that one entirely.
AFAICT there is no other bug (except the muting and zeroing of the headphone channel, when opening the audio tab in winecfg, but as that is something totally different and I haven't had time to find a good version yet, this has nothing to do with this bug) shown, sound works now again in both the videos and in the game itself.