hissing

I am operating a computer with Ubuntu 7.04 and whenever there is no sound playing over the speakers, they hiss. I know the speakers are not at fault because I also run Windows XP on the same computer and they never hiss there. Does anyone know why it might be hissing so much? The hissing does...

YO PEOPLE OF DA COMMUNITY !! This is my first post and I have to start off with a problem, please try to help. For the last past few days, I am getting a hissing/crackling sound kinda like disturbance coming through the speakers as if you're frying something on a frying pan ! It's not the...