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.
Loopy HD and Gadget via Audiobus - having one trigger the other?
Suppose you have a 2-bar Korg Gadget composition. You want to record it into Loopy HD by pressing one button. You don't want to have to fuss about tapping two buttons ("play" and "record") at the right time. Gadget (input) and Loopy HD (output) are connected via Audiobus 3. Loopy HD is set to record 2 bars, and the tempo of Loopy HD and Gadget match.
It seems there might be two ways to do what I want: (1) Have Loopy HD configured so that hitting "record" in Loopy HD (either in its main window or in the Audiobus tab displayed as a sidebar in Gadget) fires up Gadget playback on time and records it. Or (2) have Gadget control Loopy HD so that hitting "play" in Gadget fires up Loopy HD on time and Loopy HD records.
I have messed with the sync options in Loopy HD, but I can't this to work. I can get the play buttons in the apps to interact in some ways, but not what the ways I am looking for or expect.
This seems like a pretty straightforward use case, so I'm hoping someone can explain it. I am able to record from Gadget into Loopy HD manually, by hitting "play" and "record" in each app, but I would really like it if I could hit just one button and have the recording happen at the right time. It seems like this ought to be possible.