After reformatting and using the Ubuntu 13.04 Minimal CD, immediately running sudo sed -i 's/raring/saucy/g' /etc/apt/sources.list and reinstalling all of my stuff, I have sound in Ubuntu 13.10. Still, I'm not sure what caused me to lose sound when upgrading from Ubuntu 13.04 to Ubuntu 13.10.
After reformatting and using the Ubuntu 13.04 Minimal CD, immediately running sudo sed -i 's/raring/saucy/g' /etc/apt/ sources. list and reinstalling all of my stuff, I have sound in Ubuntu 13.10. Still, I'm not sure what caused me to lose sound when upgrading from Ubuntu 13.04 to Ubuntu 13.10.