I was trying to use 2 instances of GPO in Cubase SX3 and I got all kinds of crackles in the second instance which just had 2 flutes. Nothing heavy on the CPU (20%) Just for the hell of it I switched the second instance to JABB and the crackles were gone. I don’t get it. I had an open slot on the first instance of GPO. Will that cause problems? I tried different asio settings - no effect. Tried different DFD settings - no effect

Any help with where to look will be appreciated - Thanks, Collin