Random - Eurorack modules

Frisson

This is a chaos module based on the Mackey-Glass equations which were developed to show the delay in physiological systems when producing or reducing certain cells in response to variations in concentration of those cells. The result is a very complex and easily controllable chaotic pattern.

The basic Mackey-Glass system implemented into electronics is a nonlinear stage, a low pass stage and a delay stage connected in a loop.

In this circuit the delay stage is made of 8 Bessel filters, configured for sub-audio rates, which are voltage controlled via LDRs, this section is very similar to an 8 stage phase shifter. Each filter stage has an output to the front panel. There is also an external input to inject signals into the chaos which is rather interesting.

YouTube video