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.
starter screen favourites
I hesitate to request this, because one of the things I love (and this a great app) is it's simplicity, at least to us users! When you select an app in whatever slot a list appears. The list gets daily longer. Would it be possible to do a favourite or an edit as in the bookmarks on safari, moving up and down so that the apps we use most are near at hand? At this rate, in 12 months, we'll be paging through hundreds!