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.
Potential solution to popping noise when opening Turnado
I was occasionally getting a pretty loud popping noise when opening Turnado, probably 50% of the time. I remember reading here others were too. Just today I disabled the microphone access from with the iOS settings app (scroll down to Turnado and turn it off there), and it seems to have fixed this issue.
To be clear here, I say seems. In other words, take caution as if the pop is still there (for those of you getting it).
Edit: This doesn't fix it.