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Variable Pitch pipe. The earliest pitch pipes were instruments similar to the recorder, but rather than finger holes, they had a plunger like a slide whistle's (also known as a swanee whistle) making it essentially a type of Slide Whistle. The pipe was generally made of wood with a square bore, and the plunger was leather-coated.
On a slotted metal pipe, some or all of the metal cut out to make the slot is rolled up so the slot can effectively be shortened or lengthened, thus changing the pitch of the pipe. On a slotted wooden pipe, a wooden slider is provided to shorten or lengthen the slot. A stopped pipe (wood or metal) is usually tuned by moving its stopper up or down.
Tuning is the process of adjusting the pitch of one or many tones from musical instruments to establish typical intervals between these tones. Tuning is usually based on a fixed reference, such as A = 440 Hz. The term "out of tune" refers to a pitch/tone that is either too high or too low in relation to a given reference pitch. While an ...
For the flue pipes it is determined by the shape of the air column inside the pipe and whether the column is open at the end. For those pipes the pitch is a function of its length, the wavelength of the sound produced by an open pipe being approximately twice its length. A pipe half the length of another will sound one octave higher. If the ...
The tuner then displays the pitch in relation to the desired pitch, and indicates whether the input pitch is lower, higher, or equal to the desired pitch. With needle displays, the note is in tune when the needle is in a 90° vertical position, with leftward or rightward deviations indicating that the note is flat or sharp, respectively.
A tone hole is, "in wind instruments[,] a hole that may be stopped by the finger, or a key, to change the pitch of the tone produced." [1] The resonant frequencies of the air column in a pipe are inversely proportional to the pipe's effective length. In other words, a shorter pipe produces higher notes.
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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.