http://bugs.winehq.org/show_bug.cgi?id=11764
--- Comment #23 from Adam Bolte boltronics@gmail.com 2011-01-05 07:39:42 CST --- As per the image attached above, I discovered that multistreaming on my motherboard is possible under Windows 7. The options only became available when I had the headphones physically connected. However, I have yet to figure out any way to achieve the same thing under my Ubuntu 10.04 system. I've been messing around with it and searching for hours without success.
I did notice in alsamixer a Headphone option. If I connect headphones to the front of my case and leave that box ticked while playing audio in mplayer, I get the same audio stream simultaneously sent to both my front speakers and my headphones.
If I leave headphones enabled but mute the front speaker channel, both stop working. If I untick the headphone checkbox, both the headphones and front speaker channel also stop working. It certainly looks like these are both sharing the same channel, and I can't see any possible way I could redirect audio to one specific set of speakers. This is all aplay shows (aside from some other "surroundXX" plugs that seem unlikely to be useful):
$ aplay -L null Discard all samples (playback) or generate zero samples (capture) pulse Playback/recording through the PulseAudio sound server front:CARD=Intel,DEV=0 HDA Intel, ALC889 Analog Front speakers ... surround51:CARD=Intel,DEV=0 HDA Intel, ALC889 Analog 5.1 Surround output to Front, Center, Rear and Subwoofer speakers ... iec958:CARD=Intel,DEV=0 HDA Intel, ALC889 Digital IEC958 (S/PDIF) Digital Audio Output $
Would attaching anything else in particular be useful?