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An 8 ′ stop is said to sound at "unison pitch": the keys on the organ console produce the expected pitch (e.g. the key for middle C causes a middle C pipe to speak), like a piano. In a rank of stopped pipes, the lowest pipe is 4 feet in length but sounds at unison pitch—that is, at the same pitch as an 8 ′ open pipe—so it is known as an ...
Organ flue pipe scaling. Scaling is the ratio of an organ pipe 's diameter to its length. The scaling of a pipe is a major influence on its timbre. Reed pipes are scaled according to different formulas than for flue pipes. In general, the larger the diameter of a given pipe at a given pitch, the fuller and more fundamental the sound becomes.
Pipe organ tuning. This article describes the process and techniques involved in the tuning of a pipe organ. Electronic organs typically do not require tuning. A pipe organ produces sound via hundreds or thousands of organ pipes, each of which produces a single pitch and timbre. The goal of tuning a pipe organ is to adjust the pitch of each ...
When designing an organ or Boomwhacker, the diameter of the tube must be taken into account. In acoustics, end correction is a short distance applied or added to the actual length of a resonance pipe, in order to calculate the precise resonant frequency of the pipe. The pitch of a real tube is lower than the pitch predicted by the simple theory.
The organ at the Naval Academy Chapel has 522 stops. The pitch produced by an organ pipe is a function of its length. All else equal, longer pipes produce lower-pitched notes, and shorter pipes are higher in pitch. An organ stop uses a set (rank) of pipes of graduated lengths to produce the range of notes needed.
Bourdon (organ pipe) Bourdon, bordun, or bordone normally denotes a stopped flute type of flue pipe in an organ characterized by a dark tone, strong in fundamental, with a quint transient but relatively little overtone development. Its half-length construction makes it especially well suited to low pitches, and economical as well.
An open pipe, such as an 8 ft (2.4 m) Diapason, needs to be eight feet long at low "C" on the keyboard, but the capped gedackt of similar pitch need be only four feet long at that point, making the stop very compact and economical to build. As in most wood pipes, the foot, block (which contains the windway), mouthpiece and cap are hardwood.
The Haskell organ pipe construction, sometimes known as "Haskelling" is a method of organ construction used when space does not permit the builder to build a full-length pipe. It consists of a shorter (compared to the full-length pipe) tube nested within another shorter tube. This construction, however, subtly alters the tone of the pipe ...