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 StoreAudiobus is the app that makes the rest of your setup better.
What really happens when you duplicate a file on iOS?
I did an investigation into whether or not copying files takes up more space on iOS.
I tested regular copies, and copies between file providers (like AudioShare's Files storage area).
Test: What really happens when you duplicate a file on iOS?
Conclusion? Multiple copies take up no extra space. Probably.