http://bugs.winehq.org/show_bug.cgi?id=29531
--- Comment #6 from Jörg Höhle hoehle@users.sourceforge.net 2012-01-25 09:22:04 CST --- To avoid padding issues, I experimentally set DefaultPeriod to 213334 (21.333ms) to match ALSA's dmix. Then I listed to mcicda playing an audio CD. Visit bug #20555 for a howto.
Boy, was that disappointing! It was full of something as if listening through a fan or other chopper. Back to 1.3.24 yields perfect sound. Using a 10ms period produced weird effects too, much less intense. I believe this indicates that there are still severe defects in DSound which should not be so sensitive to mmdevapi's period (mcicda uses dsound). It could be something else too.