https://bugs.winehq.org/show_bug.cgi?id=50779
--- Comment #8 from Rafał Mużyło galtgendo@o2.pl --- ...need to correct myself again.
If every sound effect got its own thread, it might have still worked fine, but what seems to be happening is the opposite - every instance of a sound effect gets a thread.
It doesn't seem to effect bgm though...