Audiobus: Use your music apps together.
Audiobus is the app that makes the rest of your setup better.
StepPolyArp (x4) in AUM = Full pattern with one key press.
As requested on another thread, this is a visual/aural proof of concept for using multiple instances of SPAU in AUM to sequence a full pattern.
The only real world use to this other than using a proper sequencer is 1) fun. 2) Instantly audition a transposition.
Anyway, here's the vid.
Oh yeah, audio kicks in around 0:27 with single key presses.
At 1:15 I hit play in AUM and that's when it plays itself including Ruismaker drums.