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.
The app formerly known as Rooms!
Rooms! has undergone a name change because the old name was unfavourable in regard of web searches. The new name "Thafknar" is unique (unless people decide that is would be a nice name for their newborn).
However, I was now made aware of the fact that this change makes it necessary for users to reinstall the IAPs. These are the same IAPs as before, and the reinstallation should be free. I am sorry for this inconvenience.