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.
Band in a Box for iOS?
Is there anything close ? Session Bamd doesn’t really seem to cut it, plus it seems like abandonware . Perhaps GarageBand? I love the new BIAB , it’s tempting me to get a new laptop however it is ghastly looking . Looks like a real eye strain. I’d jump all over an iPad version though.