timo rozendal fritz jerkster chaos
The Jerkster is a chaotic cv generator with 4 parameters: Rate, Gain,
Drive, and Damping.
These parameters interact with the underlying chaotic circuit which can
be decribed by a third order differential equation. Small changes in
parameters can often lead to dramatic changes in the output. The 3 cv's
are derivatives of eachother and can be periodic but also make
unpredictable moves based on the settings. It can be used as random
source, lfo and ‘screaming noise’-generator.
It also has a with a modulation input. If the modulation signal is a vco it
can sound like a waveshaper. If you send envelope cv’s in the
modulation input you can (after some tweaking) create chaotic signals
which relate to the incoming rhythmic pattern.
The Z output is the ‘sharpest’ , the X output is the ‘smoothest’. For
periodic settings the 3 different outputs are very similar (apart from the
timbre and phase).
The module is based on this circuit with the following
modifications:
- There is a bicolor led indicator for each output which gives an
indication what is going on in the system.
- There are only single turn potentiometers used to keep the
design simple, this limits the finetuning control a bit.
- An option is added to let the modulation attenuator inject a DC
voltage when nothing is plugged in in the output (this can
introduce a bit of finetuning)
- It is also possible to limit the upper setting of the range control to
have more focus on the lower frequency range.