Thanks for this advice Silvan.
The version of unimix.exe included in the most recent uniaud update package was created on 9/22/2010. The version that shipped and installed with eCS beta 2.2 was created on 9/23/2013 and is thus three years newer.
The older version produced the following error message.
[C:\]unimix.exe -list
Command line mixer for UNIAUD32. Versio
Detected UNIAUD version 202.01
Error: invalid number of PCM instances
It seems as though I'm going to learn a bit more about uniaud. Webpage
http://trac.netlabs.org/uniaud states:
The latest beta version of Uniaud32 is 2.02.01 which is based on ALSA 1.0.24. This version has had very little testing. It is currently unknown if there are any problems with this version. Try it at your own risk and backup first
My version is the beta 2.02.01. I may have to install an earlier stable version, say maybe: Uniaud32 v.1.9.26
Should I install two sets of uniaud drivers, one for each on-board sound chip?
BTW: I tested it on an ASUS A88x-Plus motherboard and generally find eCS beta v2.2 much to my liking.
Can anyone tell what is a "PCM instance"? ;-)