http://bugs.winehq.org/show_bug.cgi?id=21655
--- Comment #3 from Raymond superquad.vortex2@gmail.com 2011-06-13 21:39:34 CDT --- yes, the compliance test also failed on windows too for some sound cards
only some of hda codec support IEEE FLOAT, I guess the wine developers are all using those hda codecs
dmix does not use float to mix
but jack and pulse plugin can support float