You'll find a great piece of EMS history an MUSYS here."I worked at Electronic Music Studios Ltd (EMS) in London, England from 1969 until 1973. (The web pages for EMS are now maintained by Graham Hinton.) My principal contribution to the studio was the MUSYS system for the composition and performance of electronic music. EMS was owned and controlled by Peter Zinovieff. David Cockerell built hardware for the studio and I wrote software. One of my rewards was to become an early owner of a VCS-3 (at left). I sold mine cheaply, not realizing that, after more than 30 years, VCS-3s would become valuable again."
via fabio
