Mandriva sound problems

Unfortunately, the version of Mandriva that is installed on my machine at work appears to be incompatible with my soundcard. That means from time to time it will scream like a banshee, and there's not much I can do about it, except mute the whole sound system. It can be done on the command-line like this:
aumix-text
and then choose "mute" or somesuch. That should stop the screaming. Thanks Greg!