That is a really cool idea, I’m in a local band and we record from our phone if we want a quick way to remember how we played something. Your Band Studio app would add a whole new level to that, especially considering how hard it is to get everyone together in one place. If you wanted to apply a certain sound to the tracks you could use something like what I made on guitar/bass, or possibly a microphone model, in the same way you’d use in on a traditional DAW.