http://bugs.winehq.org/show_bug.cgi?id=11764
--- Comment #28 from Adam Bolte boltronics@gmail.com 2011-01-06 18:01:48 CST --- (In reply to comment #27)
Alsa works very well with multi-channel.
Nobody has said otherwise. multi-channel != multistreaming, and multistreaming is already possible if you have multiple output devices (which I previously mentioned). Raymond is talking about multistreaming between the read analog and front analog ports of the same device through ALSA, which doesn't seem to be supported.
I'm not sure why getting this sorted out is a requirement to get multi-channel working but I'm not a WINE programmer.