Tuning peg
Overview
 
A tuning peg is used to hold a string
Vibrating string
A vibration in a string is a wave. Usually a vibrating string produces a sound whose frequency in most cases is constant. Therefore, since frequency characterizes the pitch, the sound produced is a constant note....

 in the pegbox
Pegbox
A pegbox is the part of certain stringed musical instruments that houses the tuning pegs....

 of a stringed instrument
String instrument
A string instrument is a musical instrument that produces sound by means of vibrating strings. In the Hornbostel-Sachs scheme of musical instrument classification, used in organology, they are called chordophones...

. It may be made of ebony
Ebony
Ebony is a dense black wood, most commonly yielded by several species in the genus Diospyros, but ebony may also refer to other heavy, black woods from unrelated species. Ebony is dense enough to sink in water. Its fine texture, and very smooth finish when polished, make it valuable as an...

, rosewood
Rosewood
Rosewood refers to any of a number of richly hued timbers, often brownish with darker veining, but found in many different hues. All rosewoods are strong and heavy, taking an excellent polish, being suitable for guitars, marimbas, turnery , handles, furniture, luxury flooring, etc.In general,...

, boxwood
Buxus
Buxus is a genus of about 70 species in the family Buxaceae. Common names include box or boxwood ....

 or other material. Some tuning pegs are ornamented with shell
Exoskeleton
An exoskeleton is the external skeleton that supports and protects an animal's body, in contrast to the internal skeleton of, for example, a human. In popular usage, some of the larger kinds of exoskeletons are known as "shells". Examples of exoskeleton animals include insects such as grasshoppers...

, metal, or plastic inlays, beads (pips) or rings.

Turning the peg tightens or loosens the string, changing the pitch
Pitch (music)
Pitch is an auditory perceptual property that allows the ordering of sounds on a frequency-related scale.Pitches are compared as "higher" and "lower" in the sense associated with musical melodies,...

 produced when the string is played and thereby tuning
Musical tuning
In music, there are two common meanings for tuning:* Tuning practice, the act of tuning an instrument or voice.* Tuning systems, the various systems of pitches used to tune an instrument, and their theoretical bases.-Tuning practice:...

 it.
Friction pegs are most often used on violin family
Violin family
The violin family of musical instruments was developed in Italy in the sixteenth century. The standard modern violin family consists of the violin, viola, cello, and double bass....

 instruments (not on the double bass
Double bass
The double bass, also called the string bass, upright bass, standup bass or contrabass, is the largest and lowest-pitched bowed string instrument in the modern symphony orchestra, with strings usually tuned to E1, A1, D2 and G2...

, which typically uses geared tuning machines.) They are also used on older instruments, such as the Bulgarian gadulka
Gadulka
The gadulka is a traditional Bulgarian bowed string instrument. Alternate spellings are "gudulka" and "g'dulka". Its name comes from a root meaning "to make noise, hum or buzz"...

 and the hurdy gurdy
Hurdy gurdy
The hurdy gurdy or hurdy-gurdy is a stringed musical instrument that produces sound by a crank-turned rosined wheel rubbing against the strings. The wheel functions much like a violin bow, and single notes played on the instrument sound similar to a violin...

, as well as on flamenco guitar
Flamenco guitar
A flamenco guitar is a guitar similar to a classical guitar. Flamenco guitar also refers to toque, the guitar-playing part of the art of Flamenco.-Brief history:...

s.

A properly working peg will turn easily and hold reliably, that is, it will neither stick nor slip.
 
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