https://bugs.winehq.org/show_bug.cgi?id=39517
--- Comment #19 from Andrew Eikum aeikum@codeweavers.com --- I've submitted a patch to default to the native version of xaudio2_6, if available. After that's committed, explicitly setting the override in winecfg should not be necessary.
http://source.winehq.org/patches/data/116000