I figured out how to use the scope, and used the Right input channel to look at the what is being sent vs what is being returned. With any passthrough, it's identical. The problem seems to be with how I'm using the other gear. The focusrite input is much quieter, so I can't use it as a effects return that I can figure out. With my Yahama mixer/PA I figure out how to set it up correctly after a lot of experimentation. The issue there is that the instructions mention to use the PEAK led to set the gain, but to even see the LED light up, you have to go pretty far. The aux send, on the other hand is very sensitive, and I can't go more than a little before pushing any external signal too far. Also you can only use one aux send at a time, and I want to use my Harmonizer and reverb unit at the same time. My solution is to use the insert with the bela, and the reverb with the aux. I will continue with some more real world tests, but it's looking like I have my problems sorted out. Thanks for all the help. Now to the next thread 🙂