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.
Riffer sync issues
Just a heads up to the DEV, I love the concept of Riffer and would use it frequently ---- but after about 8 loops the midi sync drifts badly. It seems like it is getting start / stop messages, because it sounds lined up and great for the first few bars then drifts into wonky town. Is there some setting I need to get midi clock to lockon... ?? I like the layout of the app, hope this gets fixed. This has been a problem since I first got the app. Using a 2018 10.5 iPad Pro w/ Aum as clock source.