Model 371 Dual Woggle Bug

Woggle Bug


The Woggle Bug is an utterly unique module that produces complex random voltages and tones. It reproduces the set of random voltages available from the original Buchla Model 265 "Source of Uncertainty" module. This long out of production module is representative of the most musical random voltage generators produced in the first "Golden Age" of modular synthesizers.

The Woggle Bug adds four permanently coupled audio VCOs to the random voltage outputs. The single mechanical module contains the equivalent functionality of 18 electrical modules. Obviously, all the patch points cannot be brought out to the front panel.

The modules are permanently patched into a unique arrangement of two identical "Woggle Bugs" and their "Child Tones". Each Woggle Bug has 3 control voltage inputs, 4 control voltage outputs and 5 audio outputs. Child tones are the ring modulated outputs of the two Woggle Bug "parents".

Woggle Bug

The control voltage outputs are the reason for the module and correspond to the more traditional sample and hold units with lag processors as found in other modulars. The module produces stepped, smoothed (lag processed) and "woggled" (stepped voltages with decaying sinusoids at the edges) control voltages in the range of 0 to 10 volts. These voltages are usable with any other brand of voltage controlled modular. The smooth voltages are produced by cascaded lag processors which produce a "very" smooth voltage that produces natural sounding wind and surf patches.

The module as a whole produces 10 simultaneously available electronic tonalities. The tonalities are deliberately very raw in nature. Part of the 1950's sound is the simple square and sawtooth waveforms output by electronic test equipment. Mixed together and put through a tape delay, well, you'll be doing battle with your Id monster in no time!

This applies to only some settings of the 10 controls and some of the 10 outputs. Other settings produce the sound of very large insects, or swarms of large insects. It can not make keyboard sounds and can not be controlled by a keyboard. Hooray!


• Two Multi-function circuits that provide VCA, crossfade, segue, and balanced modulator functions
• A jack multiple
Bantam (TT) or 3.5mm jacks

Block Diagram:


Large Front Panel Image
Original User Manual