The EMS Spectre Video Synthesizer Handbook. Hand drawn illustrations and sample patches. Innovative Video Synthesiser using analogue and digital techniques. * Digital Matrix Patch Panel: 53 inputs by 57 outputs. * Analogue Matrix Patch Panel: 16 by 20. * Manual, VCO and Audio controls. * Digital counters, delays and video modifiers.The prototype was used to provide a projected lightshow for an early Tangerine Dream concert at the London Rainbow.15 Built. http://www.ems-synthi.demon.co.uk/emsprods.html#spectronInterview with Richard Monkhouse. http://www.meigh-andrews.com/writing/richard.htm