is that the driver? if so, you need to make sure there's support for it in your kernel, then add
/sbin/modprobe Via823x
(or whatever is the driver, that doesn't sound like a sound driver to me, but i could be wrong)
to /etc/rc.modules.
if that's not the driver, search google to find out the name of the driver you need. then compile it into your kernel as a module and add it as above. gl