Analysis of information sources in references of the Wikipedia article "Mesin drum" in Indonesian language version.
The Roland TR-808 was officially in production for just two years—from 1980 to 1982.
In the early 1930s, Henry Cowell and Léon Theremin (inventor of the Theremin musical instrument) developed the innovative yet hard-to-use Rhythmicon — the unwieldy forerunner of the drum machine.
Only 500 of these things are out there so don't count on finding one easily.
