So I have a small pedalboard with multi effect, OD and two Ditto loopers for Duo gigs. I noticed in the garage today that things were humming. I also noticed if I turn the OD ON, it's dead silent. Humbucker guitar. Go figure. Any thoughts on why it hums with the OD OFF? I would expect the opposite. Another weird thing I didnt realize until today. If I have a loop playing back, turning the guitar up (playing over the loop) makes the loop louder. Whaaa? Guitar>Looper> Amp. Not logical either.