Just a moment ago I was listening to some songs on Banshee. Then I close Banshee, browse the net for a bit, then go to YouTube and attempt to watch some videos, and the video loads with no sound for 3 seconds and then stops. This is strange, since I've successfully watched YouTube videos before. Also, now when I go to listen to songs in Banshee, I can't listen to them - they won't play. What could have gone wrong?