http://bugs.winehq.org/show_bug.cgi?id=34887
--- Comment #6 from Andrew Eikum aeikum@codeweavers.com 2013-11-11 07:09:41 CST --- I think this is a duplicate of Bug 11764. Wine's surround sound often works, but it misses a lot of edge cases, especially in dsound. Specifically, Wine's dsound doesn't support mixing more than two channels, only passing them through to mmdevapi unmodified.