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.
Midi Bluetooth wireless/dongle set up. Is one pair of dongles per hardware instrument required?
The wireless dongles for your hardware - do you need to buy one for each piece of hardware you own - or can you send midi clock to one instrument via the dongle - have the ‘out’ dongle not in the instrument but instead a conventional midi cable to carry on the chain?