sounds like a lil churp almost, need help! thought it was the belt. popped the hood and put my ear as close as I could and it sounds like its coming from the supercharger? you can barely hear it, but I think it has got a touch louder. thanks.
Pull the blower belt and start the car, see if the noise continues. If it doesn't, check your pullies by rotating them, you should feel which one is not spinning freely. I would change them all though.