OBS is receiving sound from my iPhone mic, however i want to add audio to a scene from my DJ mixer (Xone:96) via USB into my MBP however this didn't work so installed Loopback, which works fine and has routed the channels across, plus I can now hear the music through my MBP speakers etc. However when I add an audio input and set it as Loopback no sound is registering. Any ideas?