Audiobus: Use your music apps together.
What is Audiobus? — Audiobus is an award-winning music app for iPhone and iPad which lets you use your other music apps together. Chain effects on your favourite synth, run the output of apps or Audio Units into an app like GarageBand or Loopy, or select a different audio interface output for each app. Route MIDI between apps — drive a synth from a MIDI sequencer, or add an arpeggiator to your MIDI keyboard — or sync with your external MIDI gear. And control your entire setup from a MIDI controller.Download on the App Store
Audiobus is the app that makes the rest of your setup better.
Things - Motor by AudioThing & Hainbach (Released)
Motor is a plugin effect that uses side-chaining to combine signals in new and interesting ways: put in any two signals and they will dance around each other like courting birds drunk on fermented cherries. Use it to gentle morph between sounds or rhythmically cut them up, affecting both volume and spatial position. Add life to the plainest signals with vibrato, or destroy them in interesting ways with extreme modulation speeds.