Bravo! I have waited for something like this for a long time.

Back in the early 90's I saw this interesting band called D'Cuckoo at Stanford that used a variety of midi triggers to redefine instruments relative to performed movement. https://en.wikipedia.org/wiki/D%27Cuckoo Now this can be done with AR.

Your implementation is very tight. I can see a lot of potential here. I'd throw money at in app purchases of other setups and even better would be the ability to load in my own samples and customize the associated movements, etc.

Is this a side project or are you planning on monetizing?

Anyone know of other AR music generation tools like this? I tried some searches, but didn't come up with anything.