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.
No control panel?
I launched Audiobus, Boom! 808, and GarageBand yesterday, and I got nothing. Usually, Audiobus will launch the appropriate app when tapped, switch to it, then go back to Audiobus again. It never switches back to Audiobus now (even after a reboot), and IAA won't work either (no control panel on the screen for it just like Audiobus). I'm using an iPad mini (1st gen) and iOS8. Anyone else having connection issues? I just want to record music, and I can't! Quite frustrating.