I just came back from the music store where they plugged the H8000FW into a DIGI003. I set up an ossillator and input it to the Digi. All that we heard was static, as if the volumes were up WAY to loud; it was just solid distortion. We swapped the ADAT cables out; same thing. So I am going to make arrangements to ship the unit back to Eventide for repair. I'll wait a couple of days to see if you come up with anything. Thanks for all of your help.