Hi, I recently purchased a used Ampeg scr-di pedal . The pedal works fine and does it's job with my bass plugged directly into it, but when I put a Digitech drop pedal in front of it , the only sound I get is humming with a bit of static. The drop pedal works fine when on my pedalboard going into my main amp (the Amped scr-di is not part of my pedalboard). I'm wondering if this is a thing with the scr-di, or if it has to be configured differently? I purchased the scr-di for occasionally practicing in my living room, rather than my studio. I intended to be able to use the aux in for music and the headphone jacks and just plug the drop pedal into it so i didn't have to re-tune my bass. Has anyone else had an issue with this?