Ordinarily, I'd provide you with a link, but Alsa's website is being a pain in the butt today, so I can't.
That said, you may need to redownload and recompile the ALSA sources, if running alsaconf and choosing the right card (CA0106) doesn't work. As of the 1.0.9 tree, the SB Live! 24-bit is supported by ALSA.
Go to the ALSA website (http://alsa-project.org/
) and click on Soundcards. Choose "Creative Labs", and click on Live! 24-bit (I'm doing this from memory, so it might be slightly different). There, you'll find instructions for how to compile ALSA from CVS specifically for that card. If the canned version of ALSA doesn't work, then you should download and install from CVS, and it *should* work. It worked for me, FWIW.