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.
How to Apply Scratching Effects to a Vocal Sample?
I've been listening to a lot of trip-hop lately and I really like the sound of applying scratch techniques to vocal samples. My question is, are the producers actually scratching records on a turntable, or is there some kind of plug-in that produces scratching effects to the samples? GarageBand iOS has something along these lines in the "FX" but I find it finicky and unpredictable.