mobile

Hey, I'm looking for a way to use an external mic to record audio on my Nexus 7 2013 LTE. I did a quick search and didn't find anything so I apologize if I missed it. Looking for an app or possibly a rom that allows me to choose what apps see as the default mic. I'm willing to purchase a couple of minor accessories if needed.

Specifically, I'm trying to record sermons directly from the tape out on a mixer. I'm pretty sure this device has a trrs audio jack if I understand correctly and I already have a trss adapter that splits audio in and audio out, I just cant figure out a way to make an app use that mic input rather than the internal mic. I don't care what app is required as long as it's not outrageously priced as I'm paying for this myself.