I know that this thread is an old one, but I have the same question.
I am working on mac pro with aja i/o xt and want to get audio into media composer from a mic (xlr) connected to a yamaha mixing console (mg124c). I get the audio on the speakers but not in media composer.
I am really confused and wonder if I can’t see the wood for the trees and just haven’t plugged correct or if I need a converter or something.
Thanks for helping me!