Audio works flawlessly on my pc...
I assume your other audio stuff is working okay?
My Creative Sound Blaster Audigy SE has always worked fine since Ubuntu 5.10, as well as Windows (XP and 7). My Denon AVR-600 receiver hooked up to some old Teac book-shelve speakers do the job good enough for the price (receiver was $12, bookshelves were free). They've always worked out fine, but as soon as I started using the latest stable Ubuntu, ALSA didn't work, but PulseAudio does. My main issue is that I get a weird sound while watching movies or music. It's almost like the sound turns off when there isn't enough of it, making something akin to an electronic clapping sound while watching video or playing music. Not sure how else to describe it.
I blame PulseAudio, but only because it's the only apparent change to my system. I may be ditching Ubuntu for Debian Lenny though, so I'll go back to ALSA and won't have these issues.