This video, via Pete Shambler, demonstrates using an iPad as a touchscreen controller for his modular synthesizer.
Using an iPad, Touch OSC and Max/MSP to control a Make Noise DPO.
Signal path is DPO Final out –> A-132-3.
The “Fold” portion of the DPO’s timbre section is acting as a VCA for the module. The A-132-3 is acting as a panner, using two inverted outputs from the Dr. Octature to open its
VCAs in a mirrored pattern.