Check the repositories and make sure you have an up-to-date driver for your sound card.
Aye, I already made sure everything was up to date, it happened when I tried to manually install ALSA sound drivers, it removed old stuff, and tried to install new stuff, but failed, which didn't revert to old stuff.
But after hours of tweaking I got sound out of things like YouTube videos.
But I still can't get sound out of Amarok, Rhythmbox, or any other media player. *In fact, Amarok just tells me that there's an error with the audio card and it's reverting to PulseAudio, which I already know doesn't work.*
I gave up on it, I'll go fiddle with it more when I feel like getting frustrated.
Right now, I feel like listening to music.