jeffe
15
It could be - I am not sure, that’s why I’m trying to drive the point home to simplify your setup so you don’t have to wonder - set it up so you know what should be happening.
If your MD is only going out to the headphones, then you know you’re not hearing anything through the computer - so yes, disconnect the main outs.
Really, take the steps I’ve laid out and try them one at a time, with nothing else connected, and don’t move forward until you’ve got each step working properly.