My Mini Deja Vibe is causing noise when the pedal is turned off-I can still hear kind of a voltage type hum that is in rhythm with the speed the pedal is set at. It gets faster when I turn the speed up and slower with it down. I can only hear it when I'm not playing but it pulsates-kind of a white noise. Does the light inside still flash with the pedal off? Could that be picked up by the power supply somehow? I'm using a PP2+. I emailed Fulltone over two weeks ago and haven't heard-they don't take calls anymore. Any chance this is normal? Anyone else's do that?