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.
Arm midi input with midi cc iOS.
I wish AUM or ApeMatrix had a midi learn option for midi matrix nodes, or any alternative midi arm feature to gain flexibility off screen with only one midi keyboards controlling many synths.
Until the future brings such a feature to these, or bring Ableton for iOS, is there any option to achieve this on iOS at the present time?
Controlling volume with CC is a kind of workaround but it is hungry on CPU for nothing and limits arpeggiators tricks.