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.
AUM and iPad internal mic
I've spent a couple of hours trying to sort this, so apologies if it's a regular question, I am close to smashing my head repeatedly into my keyboard. AUM picks up my internal mic, so I get a weird double/ echo/ hit when I play any external instrument. If I go into settings and disable the internal mic for AUM, it tells me I've denied it audio recording permissions and won't show the USB input, or let me do anything with it. I've tried adding the internal mic so I can just turn it down?? But I can't find it.
Please, save me!