Originally Posted by zim2dive
the xbmc page references the multiple reported devices as a potential problem.. BUT it then references another document suggesting it would shed some light on how to prune them down to just the 1 you'd want... but I wasn't able to find any more spaghetti to throw...
If you've got the four devices listed, you can knock that down to a single one with the probe_mask setting in /etc/modprobe.d/sound.conf as described on the XBMC wiki. (I pretty much wrote it, collecting the knowledge from the XBMC forum thread before it got wiped, so if it's unclear somewhere, my apologies--edits/suggestions are appreciated.)