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.
Imago - Synth One fed from the Progressions
I dare to share this little piece as the use case of Progressions
From the generated progression (F# Major) I picked few chords into the Song sequencer and sent midi to SynthOne (Randomly chosen preset "My God, it's full of Stars" by @Spidericemidas ) and the Bass note midi to Model D. Added FAC Alteza after Synth One took care of pads , and I could not resist, a FutureDrummer drums track.
Then I was 'randomly' switching among various Strummer modes and was so pleased with the result that I recorded it in AUM on my phone, sometimes while walking the dog. (that s why I prefer the phone. I can even get used, after a little while, to the latency delay of the BT headphones. )