Home | ER-101 | ER-102 | ER-301 | Wiki | Contact

Hjk Rob Chaos - chaotic generator


Rob Chaos 0.1.unit (28.2 KB)

Hjk Rob Chaos
This is a chaotic values generator based on the Synthesis Workshop by Rob Hordijk and in particular the first he talks about in the Chaos section.
I recreated the formula:
X’ = 4 * X * (1-X)
using vca’s and offsets. i think i did it well but not really sure so PLEASE if you know what i’m talking about please CHECK if that’s correct!
Feed it a clock in the clock input then the seed value sets the base number you feed the circuit when you hit the switch gate.

Use it to control the pitch of oscillators, to open filters or on whatever parameter you want to modulate.
ATTENTION! this is highly experimental, i don’t know if it’s properly working. i solved a problem in which it frequently got stuck on a “nan” value (it did not freeze but it did freeze whatever other unit it was modulating). now its working correctly i think.
i tried to use it in audio rate as pseudo noise source but then i got stuck with “nan” values… so no audio rate clocks for now.


-seed value: the initial value to be sampled by the circuit (from 0 to 1). use the fader or send it modulations or external controllers\offset generators

-clock: the clock running the show, triggering the sample and hold at the base of the circuit. for now try audio rate only at your risk :slight_smile:

-switch: when switch is pressed the seed value is sampled. when not pressed the feedback inherent in the circuit does its magic.




p.s. it tends to give extreme values, so better use it on frequency and attenuate rather than on 1v/oct
i’m working in refinements

OR: put in front of it a rational vca and divide down before going 1v/oct