harmonium: see reed organ reed organ, an organ in which air is forced over free reeds by means of bellows, usually worked by pedals. It is played by the use of one or more keyboards. Variations in tone are produced by stops that control different sets of reeds or vary the manner in which the
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Free-reed keyboard instrument in which wind from a foot-operated bellows causes metal reeds to vibrate. Pitch is determined by the size of the reed; there are no pipes. Separate sets of reed produce different tone colours, the sound quality being determined by the size and shape of the tone chamber surrounding each reed. The harmonium developed in the early to mid-19th century in Europe and America, and it was a very popular church and home instrument into the 1930s.
harmonium
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harmonium
or reed organ)
Harmonium by Jacob Alexandre, Paris, 19th century
(credit: Behr Photography)
harmonium
a musical keyboard instrument of the reed organ family, in which air from pedal-operated bellows causes the reeds to vibrate
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