Okay, this has occurred two times now. It's a Creative X-Fi Titanium. I have the correct drivers installed and it worked flawlessly until two weeks ago, when it get distorted and eventually just refused to play sound. I used Driver Sweeper and reinstalled the drivers and worked for another week.
However, now it's happened again. Is there anything I can do to fix this issue? Or does it sound (ironically) like it's faulty?
It sounds like it's a Creative XFi. People have a lot of problems with them. Apparently the drivers suck. Look for the Daniel K drivers and see if that helps, when I was researching new audio cards, I came upon many who said it helped. But search these forums, you will see many who report the same thing as you.