July 21st Serge Negative Slew Workshop at Robotspeak

"Directly across the street from where the original Serge Modular Music Systems store was on Haight st. in the 70s and 80s Robotspeak is celebrating its 10th year anniversary as a store and independant center for music technology learning. With encouragement from Ken Stone and Serge him self the second official Serge module building workshop at Robotspeak will focus on the Serge 1973 Negative Slew. One of Serge Tcherepinin's many contributions to the art of music and synthesis. The Negative Slew is the perfect example of a multi use Serge module. The predecessor and the back bone to what became west coast synthesis. It can be an Envelope Generator, an Envelope Follower, a Voltage Controlled Oscillator, an LFO and a Slope Generator. This multi functional approach to producing modules was an integral part in the design of the circuits being built at robotspeak. An innovation made 40 years ago by Serge Tcherepinin's and celebrated today with Ken Stone's recent re-release of the original 1970s circuit on PCB. The monthly organized group of builders at Robotspeak affectionately named The Church Of The Super Serge are dedicated to the preservation of the lower haight area's rich synthesizer history and the revival of the modular synth hey day in the district. Catch one of these workshops any 3rd saturday 589 1/2 Haight Street San Francisco, CA"
http://www.robotspeak.com/