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.
Band - Delta Sleep: Soft Sounds Series Using DRC App
Delta Sleep is an amazing band from the UK. They have recently started a series called soft sounds that they recorded while touring. In their first episode, the bassists used the DRC app to create some haunting sounds.
"Yeah its a synth called 'DRC' to be honest I found a sample synth and stuck loads of ring mod and warped the hell out of it which gave it this really haunting and melancholic sound."