This is comprehensive, compact and very handy MIDI controller for FieldScaper app. Despite not a very large number of controls, it can almost completely replace the on-screen user interface of the app, switching between different functions. The author of this device is Mario Jurisch (Synth-Project).
FieldScaper - Field recorder & Scapes constructor >> App Store
Advanced field recorder combined with a sound warp engine and a collection of ready to use dynamic presets for iPad and iPhone. Discover new ways to create and construct unusual and exciting sounds from any environmental audio recordings or samples recorded from other apps. >>> More about this app
Before this one, there was the first version of this controller.