Multi-channel sound output

Hans-Werner Braun hwb at
Mon May 1 00:53:02 UTC 2006

Thank you for your response. I posted a followon email a little while
ago that emu10kx works (actually, the February snapshot version). It
turns them into individual devices, like:

 Apr 30 13:13:40 mcr kernel: pcm0: <EMU10Kx DSP FRONT PCM Interface> on emu10kx0
 Apr 30 13:13:40 mcr kernel: pcm0: <SigmaTel STAC9750/51 AC97 Codec>
 Apr 30 13:13:40 mcr kernel: pcm1: <EMU10Kx DSP REAR PCM Interface> on emu10kx0
 Apr 30 13:13:40 mcr kernel: pcm2: <EMU10Kx DSP CENTER PCM Interface> on emu10kx0
 Apr 30 13:13:40 mcr kernel: pcm3: <EMU10Kx DSP SUBWOOFER PCM Interface> on emu10kx0

but the baudline spectrum analyzer is able to deal with that.

Too bad if the driver author stopped working on it, it is pretty neat.
I had tried emailing him a few times, but no response.


> Hans-Werner Braun wrote:
> > 
> > (I am not on this list, Please include me on a response)
> > 
> > I would like to make multi-channel (at least 4) sound output work.
> > I tried three different cards: Live! 5.1, Audigy SE, and Audigy 4,
> > with the standard FreeBSD 6.0 driver, emu10kx, and OSS. I did not
> > manage to get more than two channels in either combination. Does
> > anyone here have a suggestion as to what would works there?
> > 
> > For background, what I am interested in is the recreation of 3D
> > sound environments, like deploying a microphone array in an ecological
> > reserve or other interesting sound environments (see
> > and
> > for examples or preliminary
> > work), and recreating it with fairly standard equipment. For example,
> > once I get the output working, a next question will be how to read
> > from a microphone-quad (or more) while still getting phasing/etc.
> > right.
> Have a look at /usr/ports/audio/emu10kx. It's a more advanced
> sound driver for emu10kx-cards. However, I'm not sure if that's such a
> great help (I don't know the driver) but I think it's worth to
> mention. Probably it's a good point to start. 
> The author of the driver stopped working on it, though :-(
> > Hans-Werner
> HTH anyhow,
> Frank

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