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.
OT - Big Sale on Gospel Musicians for VST/AU/AAX at VSTBuzz
80% off - €99 for Vintage Keys Bundle - normally €500
http://bit.ly/2CIBQTN
Gospel Musicians needs no introduction for iOS musicians. This package includes the computer versions of 3 apps you may know well:
Neo Soul Keys (plugin) 21 GB
MKSensation (Kontakt Player)
BASSalicious (plugin)
plus
FMTines Described as "Imagine having a room with an o1W, a JD-990, a DX7, a DX7IID, an SY99, an MKS-20, and a Roland Dimension D chorus effects module and crammed into one sound library" (Free UVI workstation) 20 GB
I wonder if they will bring out an iOS version of this one...