I have an Digi 003r and a RME ADI-8 connected to the tape in's and outs of my D&R console. The inputs of the console are all +4 dB unbalanced and I'm wiring things up such that the shields are connected at the 003/ADI8 side both in and out but not at the console side (to avoid ground loops). Also I have the  "cold" wires connected to the shields for unbalanced operation. The problem is the channels with the RME ADI8 on them buzz. Interestingly enough, they only buzz when the converter is on and synced with the 003r. It sounds like a ground loop, but how is that since I have the shields disconnected at the console side? The 003r channels are silent and it connected the same way and with the cables run together so I'm pretty sure it's not RFI.
Any help would be greatly appreciated.