| Mechanical musical instrument consisting of bellows and one or more ranks of pipes
housed in a case, usually of wood, and often highly decorated. The basic principle
is the same as a traditional pipe organ, but rather than being played by an organist,
the barrel organ is activated either by a person turning a crank, or by clockwork
driven by weights or springs. Pieces of music are encoded onto wooden barrels (or
cylinders), which are analogous to the keyboard of the traditional pipe organ. A person
(or in some cases, a trained animal) which plays a barrel organ is known as an organ
grinder.
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DDEX Data Dictionary for Allowed Value Sets, 2019-09-16