A little history of the Wogglebug and circuit bending tips
2008-02-09 by Grant Richter
In it's simplest form, a Wogglebug is a VCO with a slowly moving pitch that is trying to be tracked by another VCO being controller by a phased locked loop. The exact technical details of a phased lock loop are not important. What is important is a guy named Norbert Weiner wrote a book in 1948 called "Cybernetics" which had to do with the mathematics of control systems. Later, a guy named Louis Barron read Mr. Weiners book and realized that a phase locked loop was the most primitive and relatively easy to implement form of a "cybernetic organism". His experiments with this produced an enormous amount of strange electronic sounds on magnetic tape. His poor wife Bebe had the arduous task of going through all these tapes and locating the sounds that produced some kind of evocative response in the human listener. In my humble opinion, Bebe really deserves the glory for having the patience and talent to assemble multiple evocative compositions from more or less random noise segments. I had the idea of implementing Don Buchla's circuit for a Model 265 Source of Uncertainty, but using CD4046 chips as the voltage buffers instead of simple op-amps. After several months of experimenting, I stumbled on a configuration where I realized I had accidentally rediscovered one of the techniques used by Louis Barron in his original research. A tracking phase lock loop that was rythmically disturbed by another random source. In theory, this would be the basis for at least some of what Mr. Barron did for the "Forbidden Planet" sound tracks. The only way to find out would be to methodically "circuit bend" Wogglebug modules to produce more and more bizarre behavior and tonalities. I have experimented with this and I can give you some tips, most things you try will do nothing, others will amaze you. I suggest you have a recorder handy for the good parts. 1. The Wogglebug is powered off of "energy limited class 2" circuitry according to Underwriters Laboratory". As long as the +/- 15 volt supply is UL listed, then there should be nothing you can do to electrocute yourself or start a fire. However common sense is needed, do not run electricity through your body deliberately, and make sure the wire you use is insulated and you touch only the insulated part (that is the plastic part and not the metal part). 2. You can connect a 10K resistor from any point in the circuit to any other point in the circuit without doing any harm. What is more useful is wiring a 1 meg potentiometer in series with a 10K resistor, then connect the two leads to any two random points and vary the 1 meg potentiometer from end to end while listening to different points in the circuit. 3. This tip gives the best results I have found so far. Take a VTL5C3 Vactrol and wire a 1K resistor in series with the LED inside. Connect the LED to various outputs while connecting the resistor side of the Vactrol in parallel with different front panel controls and internal resistors. Absolutely nothing you can do with or to a Wogglebug will make you even slightly rich, so if you find something cool, instead of clutching this secret knowledge to your breast like Scrooge, why not publish it here to the adulation and acclaim of the Loyal Order of the Wogglebug? We who are about to Woggle, Salute You!
