Zlob Modular

Notes: Diode Chaos is a 3hp analog chaotic low frequency voltage generator Eurorack Module available as Eurorack DIY Kit, PCB and Panel, or Built Module.

It is a unique module because it has never existed as an electronic music instrument until now. The module is based on a circuit from a paper called "A simple chaotic circuit with a light-emitting diode" written by Volos, Wang, Jafari, and Kapitaniak.

Diode Chaos produces 3 phases of interrelated morphing voltages including a chaotic trigger out. The range is 20-30 seconds a cycle up to audio rate, although only the X out and TRIG out go up to audio rate. The frequency is controlled by the RATE knob. Each output exhibits different behavior at different rate settings. X,Y, and Z outs like to stay in the 4vpp range although at different RATE settings the outs can reach 10vpp. The TRIG out chaotically releases 0-10v triggers although sometimes it will spit out smaller voltage peaks.

LED soldermask windows provide constant display of positive and negative voltage crossings.

Differences between chaos and random(some quoted and summarized material from Ian Fritz's site):

Chaos is "highly irregular, but still contained within a finite region (the "strange attractor")"

Chaos occurs in 3 dimensions.

Chaos needs a non-linear element (with Diode Chaos the nonlinear element is a red LED, and the chaos is directly visible and useable at the TRIG out).

Notes: The Dual VCA is a 2hp 2 channel Analog VCA and Mixer Eurorack Module available as a Eurorack DIY Kit, PCB and Panel, or Built Module.

It is a DC coupled OTA(LM13700) Dual Linear VCA based on the same fabled design of the VnIcursal VCA. The 2 VCAs are summed together so it can be used as a voltage controlled mixer at the "SUM OUT" or all 3 outs can be used separately and simultaneously. 5 volts into the CV in will provide unity gain, anything above 5 volts can clip the input.

Notes: The Entropy Expander is a 3hp Analog Random Voltage Generator that expands upon the features of the Entropy Euroack Module. Available as a Eurorack DIY Kit, PCB and Panel, or Built Module.

The Entropy+Expander packs together some of the most random voltage options in 6hp. It provides a controllable "Glide"(slew) out for the S/T\H, a comparator with a controllable rate("Thrsh") of random gates("Rand Gate") out with an input to compare other waveforms(Comp In, inserting a cable into here breaks the white noise normalization), and high pass filtered white noise resulting in approximate "Blue noise" (+3db/octave) and "Violet noise"(+6db/octave) outs.

The unique part of the circuit is a voltage controlled A/B switch thats normalled to the "Rand Gate" out that's switching between the S/T\H out(left Blue led window)and Infra out(right Red led window), the Glide control also effects the S/T\H coming out of the switch so you can get really random results from the "Entropy Out." Inserting a cable into "Switch CV In" breaks the random gate normalization and lets you toggle between A/B(left S/T\H out and right Infra out, indicated by the led windows) with your own gate or trigger.

There is a jumper on the pcb to select if you want glide on the s/t\h at, Entropy out, or un-slewed operation. There is also a trimmer for setting the amplitude of the incoming signal at "Comp In" which sets the frequency range of random gates. This may have to be adjusted depending on your Entropy version.

The random gate range can also be set up more as a noise oscillator by turning the pcb trim(clockwise) up or it can be set so random gates are extremely slow(trim counter clockwise) with minutes between random gates.

Notes: The Triple Cap Chaos(C^3 Chaos) is a 2hp analog, chaos based, noise oscillator, pseudo ring modulator/harmonics generator, and audio mangler Eurorack module available as a DIY Eurorack kit, PCB and Panel, or built.

It is a unique module, like the Diode Chaos, because it has never existed as a musical instrument until now. There is also no other module to my knowledge that can do exactly what the Triple Cap can do. The circuit(with several modifications) is based on the paper "Simple Autonomous Chaotic Circuits" by J.C. Sprott and Jessica R. Piper. As opposed to the Diode Chaos that generates control voltage this module focuses on the audio rate.

The "Emanate" potentiometer controls the coarser overall spectrum of the chaos, from lots of activity counter clock wise up to less chaos and more of a steady oscillation. The "Width, CV ATT" potentiometer can be thought of as more of a fine control for the chaos/oscillator. When something is inserted into the "CV" in the voltage normalization from the width knob is broken and the potentiometer now acts as an attenuator for the incoming cv. The Triple Cap is not a traditional volt per octave exponential VCO, and has a sort of narrow frequency range to exploit the chaotic behavior.

It expects a +5v to -5v max signal in to modulate the chaos. The "IN" jack is an A.C. coupled input for audio in, although cv and audio can work for both the "CV" in jack and "IN." The "IN" will interfere and interact with the onboard chaotic oscillator depending on the frequency of the input, which may take some experimentation. It can create ring mod ish sounds, to added harmonics, to almost bit crushed sounds depending on the "X" or "Y" output. The "X" output is a more windy noisy sinusoidal based output and the "Y" output is more squared off and aggressive, harsher sounding output.

Some quirks about the Triple Cap: The "X" output can offset negatively or positively a little bit depending on the pot settings, but both outputs tend to stay around 10vpp. With the "Emanate" and "Width" pots all the way up the typical frequency will be around 150hz although some will reach 200hz at this setting. With the "Emanate" pot full counter clock wise "Width" pot full clock wise the frequency will be around 250hz. It is possible to send signals into the triple cap that can bring it out of the desired range causing the oscillation to cut out.

The Triple Cap has a double sided panel. meaning one side has the classic graphics and the other is Soulless with less graphics.