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A '''free-reed''' is a device in which a reed, free at one end and fixed at the other, is located within a slot very slightly larger than the reed. Free-reeds are usually made of metal, are very durable, and hold pitch very accurately. In fact, one of their uses is as a pitch reference in the so-called "pitch-pipe."
Free-reed instruments include:
*The [[harmonica]]
*The [[accordion]]
*The [[harmonium]], often called a "reed organ" and used for performing organ music when a pipe organ would be too larger or expensive.