The Orba (1 or 2) can be used as a MIDI controlleer for AUM synths. In this rig the Orba tilt controls the Mod Wheel and Tera Pro volume slider in AUM to great effect for morphing between 2 or more synth instances. Any synth could be substitute after loading the project. Synths with Mod Wheel implementation will be the most dramatic but titling is configured to increase volume on one track while lowering it on the other.
UPDATED with Stereo Panning controlled by Orba radius sliding.