my sound card is
Multimedia audio controller: VIA Technologies, Inc. VT8233/A/8235 AC97 Audio Controller (rev 64)
and hte alsa soundcard matrix says use snd-vio82xx
ive been working my way through the gentoo alsa guide
http://www.gentoo.org/doc/en/alsa-guide.xml
but i dont seem to have modules-update andwhere on my pc