Drum machines are electronic or electric devices that make sounds
and rhythms not unlike those of drum sets or other percussion instruments,
although early machines' sounds resembled their acoustic counterparts much less.
The drum machines we have today can be programmed to create a vast variety
of different rhythms and expressions, but the early drum machines predecessors,
called rhythm machines, could only generate preset rhythms such as tango,
samba, bossa-nova, swing, etc.
The first rhythm machine was the Wurlitzer Sideman, and it came out in 1959
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