MUSYS was a commercial venture initiated created by Peter Zinovieff of EMS Synthesisers. The aim was to create an electronic computer hybrid studio for commercial use. The original MUSYS studio was a manual voltage controlled system but when the device became too complex (over 700 different controls were used) it was suggested that a computer be used. The basic studio system was designed by the EMS designer David Cockrell, using two PDP 8 minicomputers running software by Peter Grogno controlling an EMS Synthi 100. From a traditional composers point of view the system was flexible and user friendly, input to the system was via qwerty keyboard or via velocity sensitive keyboard.

The MUSYS studio was active until the demise of EMS in 1979. Works produced in the studio included "Chronometer" by Harrison Birtwhistle and Hans Werner Hense's "Glass Music".

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