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.
Problems with Animoog/AUFX/Cubasis :(
Just stumbled across a great sound using Animoog and AUFX:Dub and decided to record a tune in Cubasis (on my 32GB iPad2) but got some clicks/artefacts.
Decided to start again, unloaded and closed all apps, deleted a couple of unused apps to free some more space (over 4GB free now), went to Airplane mode and did a hard reset just to be sure!
Loaded Audiobus, added Animoog in Input slot, AUFX:Dub in FX slot and Cubasis in Output slot again. Set up my preset in Animoog and tried to record my tune again but about 1 minute in I got a big stutter and everything crashed and goes back to "desktop" icons - although the apps are still open if I double-click the Home button.
Repeated the whole procedure and same thing happens - completely crashes out whilst recording after about 1 minute.
Tried it is AUFX:Space instead but got the same problem!
I have also noticed that some apps in the input slot sometimes don't produce any sounds e.g Drumspace and even Amplitube but when I load a different app but not in Audiobus, I can get sound!
Never had this problem before upgrading to iOS 7!