What do you need? Sound technician here
Discussion
uhmm, so i initially had sound and the microphone working, but the audio coming in also fed into the OUT (to the mic), and after messing around to possibly fix it, I ended up with a mess 😁 
Cool one, did you manage to fix it, routing should be trivial, just plug the mic and make sure it is dynamic or condenser mic to set it properly, pull up gain, pull up monitoring gain to hear from earphones and last thing pull up master gain to have signal coming out. Hope it helps ask me whatever in case you need 🫂