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.
How do you feel about the Surface Pro computers including the recently announced 9?
Are they good replacements for my iPad Air 3 Wifi 64 GB model (which may not be worth selling because they sell on eBay for $160-200)? Also, what desktop softsynth can replace AddStation? I think Harmor layered in Blue Cat Patchwork might not be a bad idea.
Edit: Oh shoot, the Surface Pro 9 won't have a headphone jack?