Very cool. Would be lovely if you paired this with some of the auto-recognition and ID libraries out there so we can listen to the sounds of the forest AND see in real-time which birds are currently making noises. That'd be really cool. Then if you want to ruin it all, you add gamification where you learn to train your ear based on bird sounds and test your skills within all sorts of forests around the world.
Hi there, sorry I posted above before I saw your comment but I should have posted here. You're describing something very like my bird ID challenge! https://trogon.onrender.com/
Re the first part of what you say, rather than writing any software how about play tree.fm on our laptops and stick our phone down next to it with Merlin? That'll take about 1 minute to set up and is free!