Just got my H90 and out of the box there is a noise floor on all programs/presets that makes it unusable. I sounds like a ground buzz with a loud shhhhhh whenever audio is engaged. Using the factory power supply, I’ve tried multiple cable swaps and power outlets, guitar strait in to H90 and out to amp, tweaked parameters, mix, gate, in/out gain to no avail. I have other digital pedals that run on the board with no issues. I’ve owned the H9 and a few other Eventide delays, but never had this problem with any of those. At this point I feel pretty certain it may just be a defective unit and return it to the retailer for a replacement. Any other recommendations?