Sometimes lifting pin 1 but only at the receiver end can mitigate ground loop noise with pin 1 challenged devices. I find more often than not though that a quality line level isolation transformer is the only real fix in those situation. In any case, if you need to do a pin 1 lift, you're better off making up your own XLR to XLR shortly lift cables or getting off the shelf pin 1 lift barrels by Whirlwind. Building your cables with pin 1 already cut will screw you if you actually need an end to end ground connection to fix noise problems. Sometimes having pin 1 lifted can actually cause noise.
