I got a wild idea to run the output of my Digitech Vocalist 3 into a Zoom MS-100bt and then out to the PA mixer. I bought a short XLR (female) to balanced 1/4" (male) to run between the Digitech Vocalist and the Zoom MS-100bt. I bought a 20' balanced 1/4" (male) to XLR (female) to run from the Zoom to the mixer. My guitar runs into the Digitech and out to a 2-channel switch box (2 x send/return) I use to enable/disable two other Zooms (MS50g and MS70CDR) in my guitar signal chain. I use a DC Brick to power all 3 Zooms and the switch box. The DC Brick and the AC adapter for the Digitech plug into a power strip mounted on my pedal board. My guitar cables are Lava cables. After plugging everything in and powering on, the led on channel 2 of the switch box exhibited an erratic behavior and an unpleasant buzz could be heard. Toggling the ground lift on the Digitech only made the buzz worse. What did I do wrong? Is the problem the new XLR-1/4" cables?