http://bugs.winehq.org/show_bug.cgi?id=29585
--- Comment #45 from Mateusz Stachowski mateusz.stachowski@wp.pl 2012-03-06 16:04:02 CST --- I don't know what those games use. I don't know how to check it. I have them from Steam and the bundled DirectX libraries include XAudio and X3DAudio. Anomaly Warzone Earth required setting DirectSound HardwareAcceleration to emulation in earlier versions of Wine.
I have ran mmdevapi tests and the winmm wave test, but the output is too large to create attachment so I uploaded them elsewhere: http://ubuntuone.com/1nlGSqvxwZkrhQTYluauaR
In the archive you will find no_vmix.wav file which is exactly what i hear during mmdevapi test without vmix. That record is very quiet, but audible.
Winmm test didn't go without problems. There were times that I couldn't hear anything.