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.
Do you like Spectrum? Would you like it to have MPE? Support your local developer :)
this is from the other spectrum discussion, but I thought it was deserving of its own - especially since these sorts of things can quickly get buried in multipage threads.
I'm back and starting work on the next release of Spectrum, although I need to do an update for SynthModes first.
Regarding MPE. It's not something I use or particularly care about, but there seems to be a passionate subsection of the community who are quite interested in having it, so tell ya what.
I decided to run a tiny gofundme. If the community can raise $500CAD to buy me a Roli Seaboard Block, I'll add MPE to Spectrum.