So, I pulled the belts off, and the noise went away. I added the accessory drive belt, and the car still purred like a kitten. (As an aside, I thought it was cool how the engine made the blower freewheel in this "mode".) When I added the supercharger belt back, the noise came back. First, it was the knocking. I walked around to the front of the car to listen / look, and I saw the supercharger belt tensioner "jump" and the knocking went away, to be replaced by the squealing. So I'm 99% positive I have a bad tensioner. I emailed Tork Tech about it, and I'll let you guys know what they say.
