Yes, I am using usb audio. All external AUV3 plugins on the iPad work perfectly it is when I try to play an internal sound on the Numa X that the problem appears. It seems that Local Off prevents note info from reaching internal engine but CC info (Sustain, Pitch bend etc) is going to internal engine as well as being sent over usb midi causing the loop. I’ve a support request in with Studiologic and Camelot so hopefully will find a solution. Many thanks