Hey guys, My friend and I both recently both Korg Pitchblack floor tuners. When we plug in through them there is a loud buzzing when our guitars volume is on whatsoever. How can I get rid of this? It's running on a battery, and we both have monster cables to and from our amps to the tuners and then the tuners to the guitars. I would think it may be something wrong with the cords or something but its happening to both of us. Any input is appreciated, thanks