I'm having different problems with my Audigy. I'm running RH9 and recently "upgraded" my Kernel to 2.4.20-18.9. The previous version was 2.4.20-8. Sound didn't work in the previous version either, but since it was a newish install I didn't mess with sound in it and went to the newer update.
Per the instructions on the ALSA web site, everything seems to go fine up to the modprobe portion. When I do that step, I get errors along the lines of: "/lib/modules/2.4.20-18.9/kernel/sound/acore/snd.o: kernel-module version mismatch .... etc. Essentially continues on to say that snd.o was compiled for the previous kernel version I was running.
I'm sure this is an easy "fix" and hopefully this is my only hurdle for this newbie to get sound working!