I have been using an NDI input of Output1 for a while. I mix the Program/Main bus back to greenrooms and the link and can mute or turn it down in the greenroom if I need to. Obviously there are more work arounds but if I can get a option for program audio connected to the same Output Input, it would be more streamlined. Obviously you can screw yourself 7 ways from Sunday if you route it wrong but same goes for video. Thanks for reading!