Animoog now has background audio support, this is huge. I now recommend a killer combo. Step Poly Arp, which is a bad-ass step sequencer:
And Animoog:
In 'Settings' on the Step Poly, set Midi Out to StepPolyArp Virtual Midi Out..
In 'Setup' on the Animoog, select Background Audio (it should be green))and select StepPolyArp Virtual Midi Out as the MIDI input.
In 'Env/Mod' on the Animoog set the Control to Velocity.
Open a pattern preset from StepPolyArp
4-finger swipe or double-tap home to go to Animoog
Open a patch preset from Animoog
4-finger swipe or double-tap home to go to StepPolyArp
Start playing keys, or use the 'Latch' feature to keep a pattern running.
4-finger swipe between the apps to tweak the sound and the sequence.
It's crack, but for your ears.