Ok every now and then I start spiral knights and there is no sound for the game, other programs run fine.
But this always gets the sound going again.
close spiral knights
open task manager
end the process jusched.exe (java updater)
start spiral knights.
the java updater is only listed as running in the task manager, there is no icon in the bottom right taskbar, or application showing it as working anywhere else.
I've got windows 7, 4 gigs of ram, decent graphics card.
I hope this helps you address the sound problems of others.
I have windows 7 ultimate 64 bit and java 64 bit i fix this problem you must cut game folder from "Program Files" and paste it in "Program Files (x86)" this will fix problem example :D:\Program Files\Three Rings Design to D:\Program Files (x86)\Three Rings Design.