From the ALSA wiki
Revision as of 20:08, 3 January 2007 by Ingomueller.net
The Multimedia audio controller: ESS Technology ES1969 Solo-1 Audiodrive (rev 01) uses the es1938 driver.
A decent HOWTO can be found at:
Be certain to run ./snddevices in the alsa-drivers directory. This solves the error:
alsamixer: function snd_ctl_open failed for default: No such file or directory