Flue pipe
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A flue pipe is an organ pipe that produces sound through the vibration of air molecules, in the same manner as a recorder or a whistle, in a pipe organ. Air under pressure is driven through a flue and
Four flue pipes of a diapason rank.
Wooden flue pipes
Organ stop
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An organ stop is a component of a pipe organ that admits pressurized air to a set of organ pipes. Its name comes from the fact that stops can be used selectively by the organist; each can be "on", or
Flue pipe
…are no moving parts in a flue pipe. This is in contrast to reed pipes, whose sound is driven by beating reeds, as in a clarinet. Flue pipes include all stops of the Principal, Flute, and String classes, and some stops from the Hybrid class. Flue pipes may be metallic or wooden. Metal pipes are usually circular…
The choir division of the organ at St. Raphael's Cathedral, Dubuque, Iowa. Shown here are several ranks of pipes, each of which would be controlled from one of the stops on the console.
The organ at the Naval Academy Chapel has 522 stops.