Hoping for some of the more savvy electronics people to chime in. I want to make a pair if XLR splitters that will only pass signal in one direction. I want to isolate the two feeds. Can this be done by just putting a diode in line? Does the diode have to be on all three legs? Do I need a certain diode so that it does not affect the quality of the audio signal? I'm hoping to pull this off at the XLR connector any ideas? Would it just be simpler to buy an Iso unit like the ART XLR splitter? Thanx, Kirk