[LAU] disabling specific USB audio interface

Hi, I recently bought a USB keyboard without realizing it had a built-in audio interface. Alsa loads it (using the snd-usb-audio module) and actually kind of works (a lot of xruns) but I don't really want to use it and it messes the sound routing since some apps insist in doing their output through it (like the "play" command which is used for tooltip audio preview in Nautilus and the Flash player in Firefox). I already set it to the highest index and made sure is not selected as default in the gnome sound preferences (both Sound Preferences and Audio Configuration) but keeps causing these routing problems. Is there a way of completely disabling it without blacklisting snd-usb-audio in /etc/modprobe.conf? I have a M-Audio USB interface that I would like to be able to plug in and use. (I'm using Fedora 8 and Planet CCRMA kernel). This is how my modprobe.conf is right now: options snd cards_limit=8 alias snd-card-0 snd-hda-intel options snd-hda-intel index=0 alias snd-card-1 snd-usb-audio options snd-usb-audio index=1 and: $ sudo cat /proc/asound/cards 0 [Intel ]: HDA-Intel - HDA Intel HDA Intel at 0xfebf8000 irq 22 1 [Audio ]: USB-Audio - USB Audio Elan USB Audio at usb-0000:00:1d.7-2.4, full speed Thanks, Hector