http://bugs.winehq.org/show_bug.cgi?id=11764
--- Comment #27 from Marian-Silviu Iuga iugamarian@yahoo.com 2011-01-06 11:49:59 CST --- Alsa works very well with multi-channel. I would take a look at the alsa sources for this alsa program that works out of the box:
speaker-test
I am not a c/c++ programmer so I leave it to you.