How it works
Polyplayground has a synthesizer built in, with separate pitch bend for each finger, but is designed to be used as a MIDI controller via Camera Kit and MIDI interface. For live performance, the app takes MIDI input, allowing you to visualize what a jam partner is playing. You can also stream chords you have already played into the device so that you are never lost if you want to improvise.
This app is great for the producer, composer, music theorist, and student. It makes understanding music theory easier, because the spaces are ISOMORPHIC. This means that chords are the same in all keys. One only needs to learn a chord shape once to use it in any key