The Donca-Matic DA-20 (1963)
The Donca-Matic or Disc Rotary Electric Auto Rhythm machine DA-20 was a japanese electro-mechanical drum machine designed as an improvement on the Wurlitzer Sideman rhythm machine. This instrument was the first product for what was to become the Korg Musical Intrument company. The DA-20 despite being a primitive machine was a major breakthrough in its day, the DA-20 was soon replaced by an all electronic solid state model in 1966 the Donca DE-20.
