http://bugs.winehq.org/show_bug.cgi?id=29359
--- Comment #17 from Andrew Eikum aeikum@codeweavers.com 2012-02-14 10:28:31 CST --- Fael: It looks like the problem is related to dsound's multi channel support. The game uses 8-channel audio, and Wine's dsound doesn't support that yet.
If you are comfortable building Wine yourself, I found that the latest patchset from Bug 14717 (attachment 38385) actually improves the audio quite a bit. Apply that patchset and rebuild Wine and see if it's improved. You will still need to set the registry entry with that patchset.