I haven't played for a while, partially cause my 5 button mouse broke, and partially cause I had more than beaten it. So when I return for the sneak peak weekend, I find my sound not working. ANET's support suggests I update my sound drivers and DirectX. Done. I double check my sound settings in GW itself. Looks good. Sound plays for every other program, as far as I can tell, I've hit some invisible mute button and don't know how to unmute it.
EDIT: NM. I turned on the 3-D effects or whatever, and that did it. I have no idea why more complex audio works where simple audio does not, but I'll survive
No Sound
Sines