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The techniques for tuning flue pipes vary with the construction of the pipe: An open metal pipe usually has a sliding collar ("tuning slide") at the top of the pipe that can be moved to change the pitch. An open wooden pipe may have a metal flap partially covering its top, which can be rolled or unrolled, or bent upward or downward.
A reed pipe comprises a metal tongue (the reed) which rests against a shallot, in which is carved a tunnel. The reed and shallot are held in place by a wooden wedge. This assembly protrudes from the underside of the block and hangs down into the boot. A tuning wire is inserted
Although few look like a pipe, the pitch pipe name is still applied to any device used as a pitch reference. The most common type is a circular free reed aerophone.These are discs with the holes for the reeds around the perimeter and with marked openings for each note, into which the user blows.
The choir division of the organ at St. Raphael's Cathedral, Dubuque, Iowa.Wood and metal pipes of a variety of sizes are shown in this photograph. An organ pipe is a sound-producing element of the pipe organ that resonates at a specific pitch when pressurized air (commonly referred to as wind) is driven through it.
German for "reed flute"; a semi-capped metal pipe with a narrow, open-ended tube (i.e. "chimney") extending from the top which resembles a reed. Sackbut (English) Reed A reed stop that has a similar sound to the trombone. Found on the IV manual Kenneth Tickell organ of Worcester Cathedral, Worcestershire, England, where it has wooden resenators ...
A mixture is an organ stop, usually of principal tone quality, that contains multiple ranks of pipes including at least one mutation stop.It is designed to be drawn with a combination of stops that forms a complete chorus, for example, principals of 8 foot (8 ′), 4 ′, and 2 ′ pitches.
Ophicleide (/ ˈ ɒ f ɪ k l aɪ d / OFF-ih-klyde) and Contra Ophicleide are powerful pipe organ reed pipes used as organ stops. The name comes from the early brass instrument, the ophicleide, forerunner of the euphonium. The Ophicleide is generally at 16 ft pitch, and the Contra Ophicleide at 32 ft.
The wider the pipe, the greater the suppression. Thus, other factors being equal, wide pipes are poor in harmonics, and narrow pipes are rich in harmonics. The scale of a pipe refers to its width compared to its length, and an organ builder will refer to a flute as a wide-scaled stop, and a string-toned gamba as a narrow-scaled stop.