This is just the kind of thing that inspires me to get that Teensy working at long last. What’s more the code is shared too. You can find it here.
It is also an interesting sign that app ideas and concepts are moving out of the iOS world and into other environments and technologies. To a degree this is true with Hermutt Lobby’s hardware excursion (below), and also HumbleTune’s Phase synth on PocketC.H.I.P.
My guess is that we’ll only see more of this, and personally I think that’s a good thing.