An Australian designer of synth circuits, and manufacturer of circuit boards which can be used to build their designs. Synthesist Ken Stone played with electronics as a child, and began building his own modular synthesizer, combining Roland System 100M modules, and home built modules based on designs from electronic magazines of the time, in the early 1980s. He graduated to building modules of his own design, and began participating in various synth-related mailing lists in the late 1990s. When others found out what he was doing, he got requests for his circuit board designs, and so he began selling un-populated boards for others to build modules from.
The CGS web site is a collection of notes, circuit diagrams and stories about the creation of Ken Stone's modular synthesizer. Designs presented include those by Stone and Serge Tcherepnin. The CGS acronym comes from his modular synth, was was dubbed the "Catgirl Synth" by some of his compatriots, due to the cat-girl art used on some of his earlier module designs. Being that Stone only sold circuit boards, his designs are format-agnostic, although due to their dimensions they are easier to configure into a large format panel design. Commercial modules have been produced based on Stone's designs, including several from Cynthia.