I got this patch from a ModWiggler forum thread called Patching Chaotic CV from basic modules. It’s on page 1, from user Pelsea, and refers to this Doepfer patch page, the Chaos Patch. I don’t understand how it works. My patch was instantiated using a Tromsø for the clocked S&H, just the VCA part of Qu-Bit Cascade for the first VCA, one section of a 3XMIA for the inverting and mixing, half of a 2hp Dual VCA for the second VCA, and finally a SSF MIXMODE for the final Mix to get 4X gain.

All of the above is to create a chaotic (as opposed to random) pitch step sequence. I did not apply a CV to the second VCA, as shown above in the Logistic Map Patch. I just manually tweaked the 2hp VCA. The patch is very sensitive to the level. It worked with full unity gain, but also with slightly less than unity gain. I tried bypassing this VCA, but then it didn’t work.

The output of the S&H was used as a pitch control for a sinewave oscillator. On each clock an envelope generator was triggered to control another VCA to make notes. I passed this signal to different effects. In the following, it’s the pitch steps that are of interest. They’re not random.