I'm rather concerned about the loud pop noise that my speakers give off when I select my iSight camera in iMovie HD. Would anyone know how I can remedy this? I checked the sound preference and none of the input level bars were up that far. I am using an internal iSight. My iMovie is iMovie HD 6.0.3. I use a 17inch iMac Intel Core 2 Duo 2ghz running OS X 10.4.8. My device for soundinput is the built in mic. Would anyone have any idea as to why this happens?