Uninstall all audio kexts excluding the vanilla kext that are installed by the sl dvd. then download the latest voodoo kext from osx86/files, google it, and install kext manually using kext utility found at kext.com. Do not use the voodoohda install pkg you will get an error and it audio will not work. kext utility will rebuild cache as it installs kext so no worries about repairing permissions or runnin pfix. sound will work instantly. have fun dude. hope this helps.