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.
More apps like TC-11 (exploring the touchscreen)
The use of the touchscreen was the most relevant aspect for getting me into the iOS world. I play synthesizers since 1983 and even so alternate continuous controllers, ribbons, etc. (I love my Theremin as well ) are fun to play with, the touchscreen is a whole new ball game! It allows for articulations impossible to achieve on a normal keyboard or controller.
I was amazed when I saw the polyphonic pitch bends and aftertouch in MorphWiz and Animoog, and got even more excited when I bought TC-11 with its ultra flexible control assignments.
Then I wonder why there are no more apps like this one... I mean there are many good sounding synths now, but most of them just try to replicate the keys, panels and controls we have on a traditional synthesizer...
I would like to see devs paying more attention to this aspect.