Sound doesn't work until KDE is started
I have numerous DEs on my system and primarily use Fluxbox. However on a new system I've found that for some reason sound does not work for most of my programs until I have logged into KDE. There are a few exceptions, by which I can verify that Alsa is working correctly. I can log into KDE and then log back out and into Fluxbox and everything works fine, but if I try to log into Fluxbox first I get no audio. Clearly there's something initializing when KDE starts, but I can't for the life of me figure out what it might be. Does anyone know that it could be and, more importantly, what command I would need to pass to make it initialize when I log into a different desktop environment?