swell organ

musical instrument

Also known as: swelling organ

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Last updated

July 14, 2026

Quick Summary

A swell organ is a division within a pipe organ where the pipes are housed inside a "swell box". This box has louvers that can be opened or closed, allowing the organist to control the volume of the sound, creating a crescendo and diminuendo effect. This feature is particularly useful for adding dynamic contrast and expressiveness to the music, a characteristic that became increasingly important during the Romantic period in music.12

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keyboard instrument
Great Britain
…what Jordan described as the swelling organ, but it was not to reach its full development until 150 years later; no 18th-century organ music demands a swell box. There are hardly any surviving examples of British instruments of this period in original condition.
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…what Jordan described as the swelling organ, but it was not to reach its full development until 150 years later; no 18th-century organ music demands a swell box. There are hardly any surviving examples of British instruments of this period in original condition.
Read More