Check their hardware notes but if I remember well those cards are
supported by OSS.
That is exactly what I meant. They have the binary package for i-386
OpenBSD 3.9 on their web-site so you can try to
to see if it works. I have to warn you though that work on drivers is in
constant progress so for instance the driver for my Audigy SE was
included only last September. If you have newer Audigy card it was
probably not supported by
that package. Also obviously you do want to run 4.3 soon not to go back
to unsupported 3.9.
Probably the best approach would be to isolate the driver you need and
try to port to OpenBSD.
Cheers,
Predrag Punosevac