The history of video synthesis is tied to a "real time performance" ethic. The equipment is usually expected to function on input camera signals the machine has never seen before, delivering a processed signal continuously and with a minimum of delay in response to the ever-changing live video inputs. Following in the tradition of performance instruments of the audio synthesis world such as the Theremin, video synthesizers were designed with the expectation they would be played in live concert theatrical situations or set up in a studio ready to process a videotape from a playback VCR in real time while recording the results on a second VCR. Venues of these performances included "Electronic Visualization Events" in Chicago, The Kitchen in NYC, and museum installations. Video artist/performer Don Slepian designed, built and performed a foot-controlled Visual Instrument at the Centre Pompidou in Paris (1983) and the NY Open Center that combined genlocked early micro-computers Apple II Plus with the Chromaton 14 Video Synthesizer. and channels of colorized video feedback.