Hello everybody, I have a great TD at my school who insists on running sound cues from her laptop computer. She purchased a wonderful program from a gentleman from australia that is very editable and allows for some interesting overlaping effects. My concern... whenever it comes time for a sound effect, she unmutes the computer's channel and there is a whinning sound coming through the speakers. It almost sounds like the spinning hard drive or fan motor is creating some form of harmonic that is being amplified. Does anybody have any tricks to stop this whinning? I would like to use this program as it allows you to have crowds scream while simultaneously running a police siren... etc. I've tried lifting the ground and have tried muting all unused components on the computer to no avail. Thanks!