Yesterday everything was working fine. Today all my sounds are distorted and scratchy. I haven't been able to figure out what's going wrong, but since the biggest thing I do with my computer is play music, this is a major drag.
UPDATE: I think the cause may be a Windows update that has installing itself in the background. I've had problems with update installs sucking up resources before, and sometimes it seems like it takes hours to finish installing. We'll see how things sound when it settles down.