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.
I just wanted to take a second to tell you how impressed I am with every aspect of The Audiobus experience. To begin with, the app is nothing short of groundbreaking. Its changed the entire landscape of music making on iOS. Thats amazing by itslelf. Beyond that, though, the support has been unbelievable. Kudos to you and Sonosaurus and Pwnified (Hamilton) and all of the other developers for their hard work. Thank you guys so much.