Four vca are controlled in two pairs vca1 & vca2 (X) and vca3 & vca4 (Y), panning in X and Y. The Aux input is connected to all vcas inputs so by controlling X and Y (manually or by CV) the signal connected to aux input will be presented in all vca outputs and will "travel" between outputs by moving the stick (and/or CV).
The sum output is for morphing duties. All vcas has level controllers (knobs + CVs).
Preliminary