Open Sound System

Does this card supported? I'm trying to make it working properly with latest OSS 4.2, but I get only stereo sound. No 5.1 sound with analog connection, no sound to headphones, no sound with spdif.
The system is Fedora 15 with the default Gnome 3. Is there any information I can provide to help developers make this soundcard working?

... By the way, with spdif connection osstest plays sound but only to left and front, no 5.1. But players don't give any sound.

Here is osstest output:

[r@ngf ~]$ osstest
Sound subsystem and version: OSS 4.2 (b 2005/201108060200) (0x00040100)
Platform: Linux/i686 2.6.40.6-0.fc15.i686 #1 SMP Tue Oct 4 00:51:19 UTC 2011

*** Scanning sound adapter #-1 ***
/dev/oss/oss_cmi878x0/pcm0 (audio engine 0): Asus Xonar DX (AV100) (MultiChannel)
- Performing audio playback test...
<left> OK <right> OK <stereo> OK <measured srate 48010.00 Hz (0.02%)>
/dev/oss/oss_cmi878x0/pcm1 (audio engine 6): Asus Xonar DX (AV100) (SPDIF)
- Performing audio playback test...
<left> OK <right> OK <stereo> OK <measured srate 48000.00 Hz (0.00%)>

*** All tests completed OK ***
[r@ngf ~]$

Here is ossxmix window:

http://itmages.ru/image/view/300959/4b0fc349

4.2_2005 should support the DX according to /usr/lib/oss/etc/devices.list:

Ok, but how to enable 5.1 sound?

The ST arrives Tue...I'll play with it and ossmix/ossxmix and see if I can't get 5.1 out of it...

Update:

ST arrived early, but cannot get it to work as of yet...Stay tuned to see if I can get 5.1 working...

Ok. What is ST -- Essence STX?

The ST is their top audiophile card (released approximately two years ago). Changes from the STX include a PCI interface, a Cirrus Logic (CS2000) XO clean up chip (and its associated caps) and an interface for a daughter board for 7.1.

So, any success of getting 5.1 sound(at least the sound to all satellites)?