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.
Share ideas, techniques for Loopy Pro with guitar
Here are four things that have inspired me recently:
The cheap, wireless M-Vave Chocolate foot controller, set up with instructions from @wim.
The Boss IR-200 amp and cab simulator. I've reported on this pedal at several points in the IR-2 thread that I started before Christmas.
Impulse Responses (IRs) for acoustic guitar. I really like how my acoustic sounds through this free IR from Worship Tutorials.