Kurenniemi's concept for the studio represented a departure from the then prevalent tape editing studios in that it employed digital control technology and automation. The key unit for control, production and editing in 1964–1967 was the so-called integrated synthesizer, the design of which bore a closer resemblance to the 1950s' digital RCA synthesizer than to the voltage-controlled synthesizers of Robert Moog, for instance. In parallel with his work on designing the studio, Kurenniemi also built electronic instruments for customers, including avant-garde artist M. A. Numminen, composer Osmo Lindeman and Swedish composer Ralph Lundsten. Kurenniemi worked on a series of DIMI synthesizers (from DIgital Music Instrument). In 1970, a company called Digelius Electronics Finland Oy was set up to manufacture DIMIs.