Hello my friend, honestly, I'm feeling totally lost. I don't know hnow to send a screenshot of mios studio, however, the port routing appears to be correct if in goes to in, and out to out. If not I don't know how to change them. Yes I have an actual cable going from in to out on the midisport, and when I send the Midio128 hex.,I see stuff in the output monitor and not the input monitor. I don't see what could cause an "echo" as you describe. I don't know if it helps, but I have recieved ok checksums. Thanks!!