I decided to stay away from simple filter sweeps and all that science for my consciousness' sake. I'm showcasing the Z2040's self oscillation capabilities, there is no signal going into the filter! A Z3000 is providing a Sawtooth into the FM input and the other is providing a Triangle into the VC-FM at around 47 seconds into the video. The modulating that is happening on the Z3000's are the coarse frequency knobs. I finally touch the frequency knob on the Z2040 at 1:25 which creates an array of amazing percussive sounds that I will no doubt sample. I've heard slight variations of the sounds created before - just never from a filter alone. As with the Z3000's FM capabilities, this filter is mental!