The EMS Synthi 100 was a large analogue/digital hybrid synthesizer made by Electronic Music Studios, London, originally as a custom order from Radio Belgrade for what was to be the Radio Belgrade Electronic Studio, largely thanks to contact between composer Paul Pignon, then living in Belgrade, and Peter Zinovieff. The synthesiser was designed by David Cockerell and documented in detail in 1971. The cost at that time was £6,500. The last unit built by EMS was number 30. Afterwards, one final unit was built by Datanomics, who bought assets from EMS when the company folded in 1979. The redesigned unit was sold to Gabinete de Música Electroacústica, Cuenca, Spain.