Pretty sure it's a SoundBlaster. I'll power down sometime, pop the box open and take a look. I get this in /var/log/message file: modprobe: Can't locate module sound-slot-0 modprobe: Can't locate module sound-service-0-3 Some time ago, I tried the "soundprob" utility, but very bad things ensued; my boot up hung and I had to edit a boot file in emergency mode to fix it. Very bad. Tim