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.
Art Kerns apps - how to get support? [Answered]
I am having problems with MIDILFOs and there is no obvious way to get support or even to report a problem. Does anyone know? His web site is just a list of his apps, with no contact details.
FWIW, I removed the app by long-pressing and selecting 'delete'. It disappeared form the desktop, but still appears in the available list of MIDI AU Generators and errors when I select it. The App Store thinks it is installed, so it only has an 'Open' button, which does nothing.