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.
iMPC will get an Audiobus update.Seriously!
There's a new impc review on this (german)site and the most interesting sentence is "i asked the people at (akai)marketing and they told me they work on an audiobus update"
But he couldn't say when or if it ever will happen.
And just to bring all of you to the floor again:i bet we would see it in the OUTPUT slot only