sound in 2.6.3 + nforce3 , alsa oss compatibility mode

[timduru]

I get the alsa layer to work fine
it goes out fine through the analog out
and when telling it to go through the spdif output specifically it works fine too
however I can't set the volume levels anymore..

Also is there a way to get the spdif output activated when using OSS compatibility mode ?
(was working fine under redhat9 with 2.4.x and the nvaudio module)
(I unmuted everything in alsa-mixer, but no sound going out through spdif)


Also, I have sound skipping from time to time mainly when it's redrawing the screen (but not all the time under heavy load)
(GEforce 5600 with 5332-AMD64)
Any idea what might cause that too ?

thanks.

[Glorandar]

You will want to direct ALSA's oss emulation device 0 (/dev/dsp0, etal) to ALSA device 2, so that applications using the free/OSS API will produce their sounds on your nifty digital speaker system. To accomplish this mapping of free/OSS device 0 to ALSA device 2, add the following to your modules.conf file:

options snd-pcm-oss dsp_map=2

I put some more complete notes on this site: http://www.wlug.org.nz/NForce2Notes

One note, I am assuming here that the alsa driver provides the same devices for both the nforce2 and nforce3 motherboards. As I use an nforce2 based ABIT NF7-S (rev 2) I cannot confirm this assumption.

[timduru]

Originally posted by Glorandar
You will want to direct ALSA's oss emulation device 0 (/dev/dsp0, etal) to ALSA device 2, so that applications using the free/OSS API will produce their sounds on your nifty digital speaker system. To accomplish this mapping of free/OSS device 0 to ALSA device 2, add the following to your modules.conf file:

options snd-pcm-oss dsp_map=2

I put some more complete notes on this site: http://www.wlug.org.nz/NForce2Notes

One note, I am assuming here that the alsa driver provides the same devices for both the nforce2 and nforce3 motherboards. As I use an nforce2 based ABIT NF7-S (rev 2) I cannot confirm this assumption.

ah thanks
I had that line but with only adsp_map instead of dsp_map
I've put both and I get the sound through the spdif outputs now.
I have one problem with mpg123 though, it outputs the sound through spdif,
but it's all garbage, you can somewhat hear the music but it's very weird
(somewhat like when you play a stream and that you are missing lots of packets)

And I still can't get the volume control to work at all.
Is it working with your nforce2 ? (controlling the spdif output volume)

thanks

[Glorandar]

Nope, the mixer controls don't effect my S/PDIF output at all.