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 StoreAudiobus is the app that makes the rest of your setup better.
Audiobus synth demo
Ok, this is a little sloppy, but you get the idea. Sunrizer into Multitrack DAW via Audiobus, then NlOg PRO into MTDAW, a quick guitar chord through JamUp. Copied and pasted into Beatmaker 2 for drums and panning effects. 5 minute job.