I patch and play my customized Rollz-5, built on a PC board by Meng Qi with circuits designed by Peter Blasser of Ciat-Lonbarde. These circuits are early versions of what evolved into the Plumbutter.

4 AVDogs, envelope generator/VCAs with an oscillator
4 Ultrasounds, switched capacitor filters with a high frequency oscillator
4 Gongs, pinged filters that sound bongo-like
8 Rollz Low Frequency Oscillators, some with chaotic behavior

Some of the custom enhancements I made include:
Patchable outputs for everything
Aux inputs for the AVDogs and Gongs
Stereo output mixer similar to Plumbutter

The main outputs are on 1/4 inch jacks. All 12 sound generators are mixed down to stereo in pairs of AVDogs, Ultrasounds, and Gongs.

Key to patching is making creative use the the added inputs and output to patch the 12 generators any which way. The video starts out with cross-patched Ultrasounds. Cross patching an AVDog and a Gong makes the combo into an oscillator.

Interesting rhythmic patterns can be made by arbitrarily connecting Rollz nodes together. This is shown near the end of the video.