GBU-12 is a three channel 8hp chaotic CV generator in Eurorack format. It has two CV outputs (X and Y) per channel as well as a gate out (it fires a gate whenever output X is higher in voltage than output Y) as well as a CV input. Each channel is completely indiependant of eachother and does its own thing. The module is highly sensitive to incoming CV and can receive pretty much anything: gates, triggers, lfo’s, envelopes, clocks and audio. A good way to start with this module is to blend it with a static LFO. A typical patch would be OSC to a filter or a VCA. Mix a static triangle LFO with an output of GBU-12. Work with mixer levels so you have something that alters the modulation to your liking. That modulation will never get stale or dull, yet it is not completely random. There are plenty of video explanations on the internet about chaotic CV and I suggest you watch some of them and learn why chaotic doesn’t mean random at all. Fun is to be had. Another good way to start learning from this particular circuit (and also to check that it works) and what it does is to inject the outputs into a 1v/oct of an oscillator and listen to what it does. The GBU-12 is considered a “jerk” circuit, which means it oftentimes starts with a more sudden “pull” that then evens out. It is a bit wilder than the chaotic circuits used in most other modules, but far from random or predictable (as you will learn if you spend enough time with it). The chaotic gate is really useful in triggering other envelopes on a semi regular basis, when timing is not essential and you want diversity and life in your patch. Use it to reset an LFO. To ping a filter or Lowpass-gate or to trigger drums or “events” in your patch. The knobs changes the behavior of the waveform of each channel. It tends to get a bit wilder at full CV and slightly more predictable when full CCV (at full CCV it can sometimes even stop in its tracks for a while – this is normal). The different channels on the GBU-12 has different initial speeds from “fast” on top to slow at the bottom. You can change the initial speed somewhat by sending it CV (why not a clock?) otherwise it will just do its own thing.