View source

{{pp-vandalism|small=yes}}
{{pp-move-indef}}
{{Otheruses}}
{{Infobox instrument
|name=Guitar
|names=
|image=guitar_1.jpg
|image_capt=A classic guitar
|background=string
|classification=[[String instrument]] (plucked, nylon-stringed guitars usually played with fingerpicking, and steel-, etc. usually with a [[Guitar pick|pick]].)
|hornbostel_sachs=321.322
|hornbostel_sachs_desc=Composite [[chordophone]]
|range= [[Image:Range guitar.png|130px|center]]<div align=center>(a regularly tuned guitar)</div>
|related=*[[Bowed string instrument|Bowed]]  and [[Plucked string instrument|plucked]] string instruments 
|articles=
}}
[[File:First Act bass and electric guitars.JPG|thumb|right|250px|[[First Act]] [[bass guitar]] and [[electric guitar]]]]
The '''guitar''' is a musical instrument of the chordophone family. The standard guitar has six [[Strings (music)|strings]] but [[Tenor guitar|four-]], [[Seven-string guitar|seven-]], [[Eight-string guitar|eight-]], [[Nine-string guitar|nine-]],  [[Ten-string guitar|ten-]], [[Eleven-string guitar|eleven-]], [[Twelve-string guitar|twelve-]], [[Thirteen-string guitar|thirteen-]] and [[doubleneck guitar|eighteen-]]string guitars are also available. The two primary families of guitar types are the [[electric guitar]]s and the [[acoustic guitar]]s. The three main types of acoustic guitar are the [[classical guitar]], the [[steel-string guitar|steel-string flattop guitar]], and the [[archtop guitar]]. 

Guitars are recognized as one of the primary instruments in [[flamenco]], [[jazz]], [[blues]], [[country music|country]], [[mariachi]], [[rock music]], and many forms of [[Pop music|pop]]. They can also be a [[Classical guitar|solo classical instrument]]. Guitars may be played [[acoustic guitar|acoustically]]; the tone is produced by the vibration of the strings which is amplified by the body of the guitar which acts as a large hollow resonating chamber, or they may rely on an [[amplifier]] that can electronically manipulate tone. Such '''''[[electric guitar]]s''''' were introduced in the 1930s, and they have continued to have a profound influence on [[popular culture]] since then.

Traditionally guitars have been constructed of various woods and strung with animal gut, or more recently, with either nylon or steel strings. Guitars are made and repaired by [[luthier]]s.

== History ==
{{Main|History of the classical guitar}}
Before the development of the electric guitar and the use of synthetic materials, a guitar was defined as being an instrument having "a long, fretted neck, flat wooden soundboard, ribs, and a flat back, most often with incurved sides".<ref>Kasha, Dr. Michael (August 1968). "A New Look at The History of the Classic Guitar". ''Guitar Review'' 30,3-12</ref>  The term is used to refer to a number of such related instruments that were developed and used across Europe in the modern era.<ref>Wade, Graham ''A Concise History of the Classic Guitar'' Mel Publications, 2001</ref> Some types of guitars, which are themselves related to these European instruments, originated in the Americas. origin of stringed instruments once known in [[ancient India and Central Asia|central Asia and India]]. For this reason guitars are distantly related to contemporary instruments from these regions, including the [[tanbur]], [[setar]] and [[sitar]], among others. The oldest known iconographic representation of an instrument displaying the essential features of a guitar is a 3,300&nbsp;year old stone carving of a [[Hittite]] bard.<ref>[A Brief History of the Guitar http://www.guyguitars.com/eng/handbook/BriefHistory.html]</ref> 

The modern word, guitar, was adopted into English from Spanish ''guitarra'' (German ''Gitarre'', French ''Guitare''),<ref>{{cite web |title = Guitar Origins |url=http://www.guitarsite.com/newsletters/010625/18.shtml |accessdate=2008-11-11}}</ref> loaned from the medieval [[Andalusian Arabic]] ''qitara''<ref>{{Harvard reference|last=Farmer|first=Henry George|author-link=Henry George Farmer|year=1988|title=Historical facts for the Arabian Musical Influence|publisher=Ayer Publishing|isbn=040508496X|page=137}}</ref>, itself derived from the Latin ''cithara'', which in turn came from the earlier Greek word ''[[kithara]]'',<ref>''Kithara'' appears in the Greek New Testament four times (1 Cor. 14:7, Rev. 5:8, 14:2 and 15:2), and is usually translated into English as ''harp''. [[Strong's Concordance]] Number:   2788 [http://www.biblestudytools.net/Lexicons/Greek/grk.cgi?number=2788&version=kjv] </ref> a descendant of Old Persian ''sihtar'' (''Tar'' means ''string'' in [[Persian language|Persian]]).<ref>{{cite web |title = Online Etymology Dictionary |url=http://www.etymonline.com/index.php?search=guitar&searchmode=none |accessdate=2007-09-21}}</ref>

[[Image:Guitar-like plucked instrument, Carolingian Psalter, 9th century manuscript.jpg|thumb|right|Illustration from a [[Carolingian]] [[Psalter]] from the 9th century, showing a guitar-like plucked instrument.]] 

The guitar is descended from the [[Ancient Rome|Roman]] [[cithara]] brought by the Romans to [[Hispania]] around 40 AD, and further adapted and developed with the arrival of the four-string [[oud]], brought by the [[Moors]] after their [[Umayyad conquest of Hispania|conquest]] of Iberia in the 8th century.<ref>Summerfield, Maurice J. (2003). ''The Classical Guitar, It's Evolution, Players and Personalities since 1800'' (5th ed.) Blaydon on Tyne: Ashley Mark Publishing. ISBN 1-872-63946-1.</ref> Elsewhere in Europe, the indigenous six-string Scandinavian ''lut'' ([[lute]]), had gained in popularity in areas of Viking incursions across the continent. Often depicted in carvings c. 800 AD, the Norse hero Gunther (also known as Gunnar), played a lute with his toes as he lay dying in a snake-pit, in the legend of Siegfried.<ref>[Viking Art & Architecture http://www.angelfire.com/realm/shades/vikings/vikart.htm]</ref> By 1200 AD, the four-string "guitar" had evolved into two types: the ''{{lang|la|guitarra moresca}}'' (Moorish guitar) which had a rounded back, wide fingerboard and several soundholes, and the ''{{lang|la|guitarra latina}}'' (Latin guitar) which resembled the modern guitar with one soundhole and a narrower neck.<ref>[A Look At The History Of The Guitar http://www.thejazzfestival.net/showarticle?id=109580]</ref>  In the 14th and 15th centuries the qualifiers "moresca" and "latina" were dropped and these four course instruments were simply called guitars.<ref> Tom and Mary Anne Evans. ''Guitars: From the Renaissance to Rock.'' Paddington Press Ltd 1977 p.16</ref>

The Spanish [[vihuela]] or (in Italian) "{{lang|la|viola da mano}}", a guitar-like instrument of the 15th and 16th centuries, is often considered a major influence in the development of the modern guitar. It had six courses (usually), lute like [[tuning]] in fourths and a guitar-like body, although early representations reveal an instrument with a sharply-cut waist. It was also larger than the contemporary four course guitars. By the late 15th century some vihuelas began to be played with a bow, leading to the development of the [[viol]]. By the sixteenth century the vihuela's construction had more in common with the modern guitar, with its curved one-piece ribs, than with the viols, and more like a larger version of the  contemporary four-[[Course (music)|course]] guitars. The vihuela enjoyed only a short period of popularity in Spain and Italy during an era dominated elsewhere in Europe by the [[lute]]; the last surviving published music for the instrument appeared in 1576. Meanwhile the five-course [[baroque guitar]], which was documented in Spain from the middle of the 16th century, enjoyed popularity, especially in Spain, Italy and France from the late 16th century to the mid 18th century. <ref>"The first incontrovertible evidence of five-course instruments can be found in Miguel Fuenllana's  ''Orphenica Lyre'' of 1554, which contains music for a ''vihuela de cinco ordenes''.  In the following year Juan Bermudo wrote in his ''Declaracion de Instrumentos Musicales'': "We have seen a guitar in Spain with five courses of strings." Bermudo later mentions in the same book that "Guitars usually have four strings", which implies that the five-course guitar was of comparatively recent origin, and still something of an oddity". Tom and Mary Anne Evans ''Guitars: From the Renaissance to Rock.'' Paddington Press Ltd 1977 p.24 </ref><ref>"We know from literary sources that the five course guitar was immensely popular in Spain in the early seventeenth century and was also widely played in France and Italy...Yet almost all the surviving guitars were built in Italy...This apparent disparity between the documentary and instrumental evidence can be explained by the fact that, in general, only the more expensively made guitars have been kept as collectors' pieces. During the early seventeenth century the guitar was an instrument of the people of Spain, but was widely played by the Italian aristocracy." Tom and Mary Anne Evans. ''Guitars: From the Renaissance to Rock.'' Paddington Press Ltd 1977 p.24 </ref> Confusingly, in Portugal, the word ''vihuela'' referred to the guitar, whereas ''guitarra'' meant the "[[Portuguese guitar]]", a variety of [[cittern]].

== Types of guitars ==
[[Image:Jan Vermeer van Delft 013.jpg|thumb|right|The guitar player (c. 1672), by [[Johannes Vermeer]]]]
Guitars can be divided into two broad categories, acoustic and electric:

=== Acoustic guitars ===

There are several notable subcategories within the acoustic guitar group: classical and flamenco guitars; steel-string guitars, which include the flat-topped, or "folk," guitar; [[12-string guitar|twelve-string guitars]]; and the arched-top guitar. The acoustic guitar group also includes unamplified guitars designed to play in different registers, such as the acoustic bass guitar, which has a similar tuning to that of the electric bass guitar.

==== [[Renaissance]] and [[Baroque]] [[Baroque guitar|guitars]] ====
:These are the gracile ancestors of the modern [[classical guitar]]. They are substantially smaller and more delicate than the classical guitar, and generate a much quieter sound. The strings are paired in courses as in a modern [[12-string guitar]], but they only have four or five courses of strings rather than six. They were more often used as rhythm instruments in ensembles than as solo instruments, and can often be seen in that role in [[early music]] performances. ([[Gaspar Sanz]]' ''Instrucción de Música sobre la Guitarra Española'' of 1674 constitutes the majority of the surviving solo corpus for the era.) Renaissance and Baroque guitars are easily distinguished because the Renaissance guitar is very plain and the Baroque guitar is very ornate, with ivory or wood inlays all over the neck and body, and a paper-cutout inverted "wedding cake" inside the hole.

==== [[Classical guitar]]s ====
:These are typically strung with nylon strings, played in a seated position and are used to play a diversity of musical styles including [[European classical music|classical music]]. The classical guitar's wide, flat neck allows the musician to play scales, arpeggios and certain chord forms more easily and with less adjacent string interference than on other styles of guitar. [[Flamenco guitar]]s are very similar in construction, but are associated with a more percussive tone. In Mexico, the popular [[mariachi]] band includes a range of guitars, from the tiny [[requinto]] to the [[guitarron]], a guitar larger than a cello, which is tuned in the bass register. In Colombia, the traditional quartet includes a range of instruments too, from the small bandola (sometimes known as the Deleuze-Guattari, for use when traveling or in confined rooms or spaces), to the slightly larger [[tiple]], to the full sized classical guitar. The requinto also appears in other Latin-American countries as a complementary member of the guitar family, with its smaller size and scale, permitting more projection for the playing of single-lined melodies. Modern dimensions of the classical instrument were established by the Spaniard [[Antonio de Torres Jurado]] (1817-1892). In recent years, the series of guitars used by the Niibori Guitar orchestra have gained some currency, namely:
;* Sopranino guitar (an octave and a fifth higher than normal); sometimes known as the piccolo guitar
;* Soprano guitar (an octave higher than normal)
;* [[Alto guitar]](a 5th higher than normal)
;* Prime (ordinary classical) guitar
;* Niibori bass guitar (a 4th lower than normal); Niibori simply calls this the "bass guitar", but this assigns a different meaning to the term than other parts of the community use, as his is only a 4th lower, and has 6 strings
;* [[Contrabass guitar]] (an octave lower than normal)

==== [[Flamenco guitar]]s ====
:The [[flamenco]] guitar is similar to the classical guitar, but of lighter construction, with a cypress body and spruce top.  Tuning pegs like those of a violin are traditional, although many modern flamenco guitars have machine heads.  A distinguishing feature of all flamenco guitars is the tapping plates (''golpeadores'') glued to the table, to protect them against the taps with the fingernails that are an essential feature of the flamenco style.

:Many modern soloists (following the lead of [[Paco de Lucía]]) play what is called a ''flamenca negra,'' a hybrid of the flamenco and classical guitar constructions

==== The modern [[Ten-string guitar]] ====
:The Modern/Yepes 10-string guitar (a classical guitar) adds four strings (resonators) tuned in such a way that they (along with the other three bass strings) can resonate in unison with any of the 12 chromatic notes that can occur on the higher strings; the idea behind this being an attempt at enhancing and balancing sonority.
{{Main|Ten-string guitar}}

==== [[Portuguese guitar]] ====
:In spite of the name, it is not a guitar, but rather a [[cittern]].
{{Main|Portuguese guitar}}

==== [[Steel-string acoustic guitar|Flat-top (steel-string) guitars]] ====
:Similar to the [[classical guitar]], however, within the varied sizes of the steel-stringed guitar the body size is usually significantly larger than a classical guitar and it has a narrower, reinforced neck and stronger structural design. The robust X-bracing typical of the steel-string was developed in the 1840s by German-American luthiers of whom [[C. F. Martin]] is the best known. Originally used on gut-strung instruments, the strength of the system allowed the guitar to withstand the additional tension of steel strings when this fortunate combination arose in the early 20th century.  The steel strings produce a brighter tone, and according to many players, a louder sound. The acoustic guitar is used in many kinds of music including folk, country, bluegrass, pop, jazz and blues. Many variations are possible from the roughly classical-sized [[00 guitar|OO]] and [[Parlour guitar|Parlour]] to the large [[Dreadnought (guitar type)|Dreadnought]] and [[Jumbo (guitar type)|Jumbo]]. [[Ovation Guitar Company|Ovation]] makes a modern variation, with a rounded back/side assembly molded from artificial materials.

==== [[Archtop guitar]]s ====
:These are steel-string instruments in which the top (and often the back) of the instrument are carved from a solid billet in a curved rather than a flat shape; this violin-like construction is usually credited to the American [[Orville Gibson]] (1856-1918). [[Lloyd Loar]] of the [[Gibson Guitar Corporation|Gibson Mandolin-Guitar Mfg. Co]] introduced the violin-inspired f-hole design now usually associated with archtop guitars, after designing a style of [[mandolin]] of the same type. The typical archtop guitar has a large, deep, hollow body whose form is much like that of a mandolin or violin family instrument. Nowadays, most archtops are equipped with magnetic pickups and are therefore both acoustic and electric. F-hole archtop guitars were immediately adopted upon their release by both [[jazz]] and [[country music|country]] musicians and have remained particularly popular in jazz music, usually with flatwound strings.

==== [[Selmer-Maccaferri guitar]]s ====
:These are usually played by those who follow the style of [[Django Reinhardt]]. It is an unusual-looking instrument, distinguished by a fairly large body with squarish bouts, and either a "D"-shaped or longitudinal oval soundhole. The strings are gathered at the tail like an archtop guitar, but the top is formed from thin spruce (like a flat-top or classical) forced into a shallow dome. It also has a wide fingerboard and slotted head like a nylon-string guitar. The loud volume and penetrating tone make it suitable for single-note [[guitar solo|soloing]] and it is frequently employed as a [[lead guitar|lead instrument]] in [[gypsy swing]].

[[Image:JMT8stringguitar.jpg|right|thumb|thumb|An 8-string [[Baritone guitar|baritone]] tricone [[resonator guitar]].]]
==== [[Resonator Guitar|Resonator]]'', ''resophonic'' or ''[[Dobro]] guitars ====
:All three principal types of resonator guitars were invented by the Slovak-American [[John Dopyera]] (1893-1988) for the National and Dobro ('''Do'''pyera '''Bro'''thers) companies. Similar to the flat top guitar in appearance, but with a body which may be made of brass, nickel-silver or steel as well as wood, the sound of the resonator guitar is produced by one or more aluminum resonator cones mounted in the middle of the top. The physical principle of the guitar is therefore similar to the [[loudspeaker]]. The original purpose of the resonator was to produce a very loud sound; this purpose has been largely superseded by electrical amplification, but the resonator guitar is still played because of its distinctive tone. Resonator guitars may have either one or three resonator cones.  The method of transmitting sound resonance to the cone is either a "biscuit" bridge, made of a small piece of hardwood at the vertex of the cone (Nationals), or a "spider" bridge, made of metal and mounted around the rim of the (inverted) cone (Dobros). Three-cone resonators always use a specialized metal bridge. The type of resonator guitar with a neck with a square cross-section – called "square neck" or "Hawaiian" – is usually played face up, on the lap of the seated player, and often with a metal or glass [[slide guitar|slide]]. The round neck resonator guitars are normally played in the same fashion as other guitars, although slides are also often used, especially in blues.

==== [[Twelve-string guitar|12-string guitar]]s ====
:The twelve-string guitar usually has steel strings and is widely used in [[folk music]], [[blues]] and [[rock and roll]]. Rather than having only six strings, the 12-string guitar has six [[Course (music)|course]]s made up of two strings each, like a [[mandolin]] or [[lute]]. The highest two courses are tuned in unison, while the others are tuned in octaves. The 12-string guitar is also made in electric forms.

==== [[Russian guitar]]s ====
:These are seven-string acoustic guitars which were the norm for Russian guitarists throughout the 19th and well into the 20th centuries. The guitar is traditionally tuned to an open G major.

==== [[Acoustic bass guitar]]s ====
:These have steel strings or gut strings and often the same tuning as an electric [[bass guitar]].

==== [[guitarrón mexicano|Guitarrón]] ====
:The guitarrón is a very large, deep-bodied Mexican 6-string acoustic bass played in mariachi bands. It is fretless with heavy gauge nylon strings, and is usually played by doubling notes at the octave, which is facilitated by the unusual tuning of A D G C E A.

==== [[Tenor guitars]] ====
:A number of classical guitarists call the Niibori prime guitar a "Tenor Guitar" on the grounds that it sits in pitch between the alto and the bass. Elsewhere {{Citation needed|date=August 2007}}the name is taken for a 4-string guitar with a scale length of 23" (585&nbsp;mm) – about the same as a Terz Guitar. The tenor guitar is tuned in fifths, C G D A, as is the tenor banjo and the cello. It is generally accepted {{Citation needed|date=August 2007}} that the tenor guitar was created to allow a tenor banjo player to follow the fashion as it evolved from Dixieland Jazz towards the more progressive Jazz that featured guitar. It allows a tenor banjo player to provide a guitar-based rhythm section with little to learn. A small minority of players (such as Nick Reynolds of the Kingston Trio) close tuned the instrument to D G B E to produce a deep instrument that could be played with the 4-note chord shapes found on the top 4 strings of the guitar or ukulele. The deep pitch warrants the wide-spaced chords that the banjo tuning permits, and the close tuned tenor does not have the same full, clear sound.

==== [[Harp guitar]]s ====
:Harp Guitars are difficult to classify as there are many variations within this type of guitar. They are typically rare and uncommon in the popular music scene. Most consist of a regular guitar, plus additional 'harp' strings strung above the six normal strings. The instrument is usually acoustic and the harp strings are usually tuned to lower notes than the guitar strings, for an added bass range. Normally there is neither fingerboard nor frets behind the harp strings. Some harp guitars also feature much higher pitch strings strung below the traditional guitar strings. The number of harp strings varies greatly, depending on the type of guitar and also the player's personal preference (as they have often been made to the player's specification).<ref>http://www.oddmusic.com/gallery/om23350.html</ref>   The Pikasso guitar; 4 necks, 2 sound holes, 42 strings] and also the Oracle Harp [[Sympitar]]; 24 strings (with 12 sympathetic strings protruding through the neck) are modern examples. 

==== Extended-range guitars ====
:For well over a century guitars featuring [[seven-string guitar|seven]], [[eight-string guitar|eight]], [[nine-string guitar|nine]], [[ten-string guitar|ten]] or more strings have been used by a minority of guitarists as a means of increasing the range of pitch available to the player. Usually, it is bass strings that are added. Classical guitars with an extended range are useful for playing [[lute]] repertoire, some of which was written for lutes with more than six courses. A typical example is the modern 11 string ''archguitar'', invented and played by Peter Blanchette.<ref>{{cite website |title = Peter Blanchette, Composer & Archguitarist| url = http://www.archguitar.com/ | publisher = Peter Blanchette | accessdate = 2009-10-19 }}</ref>

==== [[Guitar battente]] ====
:The battente is smaller than a classical guitar, usually played with four or five metal strings. It is mainly used in [[Calabria]] (a region in southern Italy) to accompany the voice.

[[Image:Stratocaster detail DSC06937.jpg|thumb|right|This [[Fender Stratocaster]] has features common to many electric guitars: multiple pickups, a whammy bar, volume and tone knobs.]]

=== Electric guitars ===
{{Main|Electric guitar}}
Electric guitars can have solid, semi-hollow, or hollow bodies, and produce little sound without amplification. [[Electromagnetism|Electromagnetic]] [[Pick up (music technology)|pickup]]s convert the vibration of the steel strings into [[electrical signal]]s, which are fed to an [[amplifier]] through a [[cable]] or [[radio]] [[transmitter]]. The sound is frequently modified by other electronic devices or the natural [[distortion]] of valves ([[vacuum tube]]s) in the amplifier. There are two main types of pickup, [[single coil|single]] and double coil (or [[humbucker]]), each of which can be [[Pick up (music technology)#Active and passive pickups|passive]] or [[Pick up (music technology)#Active and passive pickups|active]]. The electric guitar is used extensively in [[jazz]], [[blues]], and [[rock and roll]]. The first successful magnetic pickup for a guitar was invented by [[George Beauchamp]], and incorporated into the 1931 Ro-Pat-In (later [[Rickenbacker]]) [[Frying pan (guitar)|"Frying Pan"]] lap steel;  other manufacturers, notably [[Gibson Guitar Corporation|Gibson]], soon began to install pickups in archtop models. After World War II the completely solid-body electric was popularized by Gibson in collaboration with [[Les Paul]], and independently by [[Leo Fender]] of [[Fender Musical Instruments Corporation|Fender Music]]. The lower fretboard action (the height of the strings from the fingerboard), lighter (thinner) strings, and its electrical amplification lend the electric guitar to some techniques which are less frequently used on acoustic guitars. These include [[tapping]], extensive use of [[legato]] through [[pull-off]]s and [[hammer-on]]s (also known as slurs), [[pinch harmonic]]s, [[volume swells]], and use of a [[tremolo arm]] or [[effects pedals]].

The first guitarist of note to use a seven-string guitar was jazz guitarist [[George Van Eps]], who was noted as a pioneer of this instrument.  ''[[Seven-string guitar|Solid body seven-string]]s'' were popularized in the 1980s and 1990s in part due to the release of the [[Ibanez Universe]] guitar, endorsed by [[Steve Vai]]. Other artists go a step further, by using an ''[[8-string guitar]]'' with two extra low strings. Although the most common 7-string has a low B string, [[Roger McGuinn]] (of [[The Byrds]] and [[Rickenbacker]]) uses an octave G string paired with the regular G string as on a 12-string guitar, allowing him to incorporate chiming 12-string elements in standard 6-string playing. in 1982 [[Uli Jon Roth]] developed the "Sky Guitar", with a vastly extended amount of frets, which was the first guitar to venture into the upper registers of the violin. Roth's 7-string and 33 fret "Mighty Wing" guitar features an altogether 6-octave range.

The [[bass guitar|electric bass guitar]] is similar in tuning to the traditional [[double bass]] viol.
Hybrids of acoustic and electric guitars are also common. There are also more exotic varieties, such as guitars with [[double neck guitar|two]], three,<ref>[http://vai.com/Machines/guitarpages/guitar040.html The Official Steve Vai Website: The Machines]</ref> or rarely four necks, all manner of alternate string arrangements, [[Fretless guitar|fretless fingerboards]] (used almost exclusively on bass guitars, meant to emulate the sound of a [[Double bass|stand-up bass]]), [[5.1 surround guitar]], and such.

Some electric guitar and electric bass guitar models feature [[Piezoelectric]] pickups, which function as [[transducer]]s to provide a sound closer to that of an acoustic guitar with the flip of a switch or knob, rather than switching guitars. Those that combine [[Piezoelectric]] pickups and magentic pickups are sometimes known as hybrid guitars. <ref>[http://www.guitarnoize.com/blog/category/hybrid-guitars/ Hybrid guitars]</ref>

==Guitar construction and components==
<div class="thumb tright" style="width:405px;">
<div class="thumbinner">[[Image:Acoustic guitar parts.png|220px]][[Image:Electric guitar parts.jpg|175px]]
<div class="thumbcaption" style="-moz-column-count:2; -webkit-column-count:2; column-count:2;">
# [[Guitar#Headstock|Headstock]]
# [[Guitar#Nut|Nut]]
# [[Machine head]]s (or pegheads, tuning keys, tuning machines, tuners)
# [[Guitar#Frets|Fret]]s
# [[Guitar#Truss rod|Truss rod]]                                                                     
# [[Guitar#Inlays|Inlay]]s
# [[Guitar#Neck|Neck]] 
# Heel (acoustic) – Neckjoint (electric)
# [[Guitar#Body (acoustic guitar)|Body]]
# [[Guitar#Pickups|Pickups]]
# [[Guitar#Electronics|Electronics]]
# [[Guitar#Bridge|Bridge]]
# [[Guitar#Pickguard|Pickguard]]
# Back
# [[Sounding board|Soundboard]] (top)
# Body sides (ribs)
# [[Sound hole]], with [[Rosette]] inlay
# [[Guitar#Strings|Strings]]
# Saddle
# [[Guitar#Fretboard|Fretboard]] (or Fingerboard)
</div>
</div>
</div>

=== General ===

Guitars can be constructed to meet the demands of both left and right-handed players. Traditionally the dominant hand is assigned the task of plucking or strumming the strings. For the majority of people this entails using the right hand. This is because musical expression (dynamics, tonal expression and colour etc) is largely determined by the plucking hand, while the fretting hand is assigned the lesser mechanical task of depressing and gripping the strings. This is similar to the convention of the [[violin]] family of [[Musical instrument|instruments]] where the right hand controls the bow. A minority, however, believe that left-handed people should learn to play guitars strung in the manner used by right-handed people, simply to standardise the instrument.{{Who|date=July 2009}}

=== Headstock ===
{{Main|Headstock}}

The headstock is located at the end of the guitar neck furthest from the body. It is fitted with machine heads that adjust the tension of the strings, which in turn affects the pitch. Traditional tuner layout is "3+3" in which each side of the headstock has three tuners (such as on [[Gibson Les Paul]]s). In this layout, the headstocks are commonly symmetrical. Many guitars feature other layouts as well, including six-in-line (featured on [[Fender Stratocaster]]s) tuners or even "4+2" (Ernie Ball Music Man). However, some guitars (such as [[Steinberger]]s) do not have headstocks at all, in which case the tuning machines are located elsewhere, either on the body or the bridge.

===Nut===
{{Main|Nut (instrumental)}}

The nut is a small strip of [[bone]], [[plastic]], [[brass]], [[corian]], [[graphite]], [[stainless steel]], or other medium-hard material, at the joint where the headstock meets the fretboard. Its grooves guide the strings onto the fretboard, giving consistent lateral string placement. It is one of the endpoints of the strings' vibrating length. It must be accurately cut, or it can contribute to tuning problems due to string slippage, and/or string buzz. To reduce string friction in the nut, which can adversely affect tuning stability, some guitarists fit a roller nut. Some instruments use a zero fret just in front of the nut. In this case the nut is used only for lateral alignment, the string height being set by the zero fret.

===Fretboard===
{{Main|Fingerboard}}

Also called the '''fingerboard''', the [[fretboard]] is a piece of wood embedded with metal frets that comprises the top of the neck. It is flat on [[classical guitar]]s and slightly curved crosswise on acoustic and electric guitars. The curvature of the fretboard is measured by the fretboard radius, which is the radius of a hypothetical circle of which the fretboard's surface constitutes a segment. The smaller the fretboard radius, the more noticeably curved the fretboard is. Most modern guitars feature a 12" neck radius, while older guitars from the 1960s and 1970s usually feature a 6-8" neck radius. Pinching a string against the fretboard effectively shortens the vibrating length of the string, producing a higher pitch. Fretboards are most commonly made of [[rosewood]], [[ebony]], [[maple]], and sometimes manufactured or composite materials such as HPL or resin. See below on section "Neck" for the importance of the length of the fretboard in connection to other dimensions of the guitar.

===Frets===
{{Main|Fret}}

Frets are metal strips (usually nickel alloy or stainless steel) embedded along the fretboard and located at exact points that divide the scale length in accordance with a specific mathematical formula. Pressing a string against a fret determines the strings' vibrating length and therefore its resultant pitch. The pitch of each consecutive fret is defined at a half-step interval on the [[chromatic scale]]. Standard classical guitars have 19 frets and electric guitars between 21 to 24 frets (though Caparison Guitars issue guitars with as many as 27 frets.<ref>[http://www.caparison.jp/caparison-eng/e-09product/e09horus-hgsmfef.html  Caparison Horus-HGS ]</ref>)

Frets are laid out to a mathematical ratio that results in [[equal temperament|equal tempered]] division of the octave. The [[ratio]] of the spacing of two consecutive frets is the [[twelfth root of two]]. The twelfth fret divides the [[scale length]] in two exact halves and the 24th fret position divides the [[scale length]] in half yet again. Every twelve frets represents one octave. In practice, [[luthiers]] determine fret positions using the constant 17.817, which is derived from the [[twelfth root of two]] (2<sup>1/12</sup>). The [[scale length]] divided by this value yields the distance from the nut to the first fret. That distance is subtracted from the [[scale length]] and the result is divided in two sections by the constant to yield the distance from the first fret to the second fret. Positions for the remainder of the frets are calculated in like manner.<ref name="Calculating Fret Positions">{{cite web|last=Mottola|first=R.M.|title=Lutherie Info – Calculating Fret Positions|url=http://www.liutaiomottola.com/formulae/fret.htm}}</ref> Actual fret spacing does not use this exact value; the fret spacing on the fretboard was also done by trial and error (testing) method over the ages.

There are several different fret gauges, which can be fitted according to player preference. Among these are "jumbo" frets, which have much thicker gauge, allowing for use of a slight vibrato technique from pushing the string down harder and softer. "Scalloped" fretboards, where the wood of the fretboard itself is "scooped out" between the frets allows a dramatic vibrato effect. Fine frets, much flatter, allow a very low string-action but require other conditions such as curvature of the neck to be well maintained in order to prevent buzz. 

On steel-string guitars, frets are eventually bound to wear down; when this happens, frets can be replaced or, to a certain extent, leveled, polished, recrowned, or reshaped as required.

=== Truss rod ===
{{Main|Truss rod}}

The '''truss rod''' is a metal rod that runs along the inside of the neck. It is used to correct changes to the neck's curvature caused by the neck timbers aging, changes in humidity or to compensate for changes in the tension of strings. The tension of the rod and neck assembly is adjusted by a hex nut or an allen-key bolt on the rod, usually located either at the headstock, sometimes under a cover, or just inside the body of the guitar underneath the fretboard and accessible through the sound hole. Some truss rods can only be accessed by removing the neck. The truss rod counteracts the immense amount of tension the strings place on the neck, bringing the neck back to a straighter position. Turning the truss rod clockwise will tighten it, counteracting the tension of the strings and straightening the neck or creating a backward bow. Turning the truss rod counter-clockwise will loosen it, allowing string tension to act on the neck and creating a forward bow. Adjusting the truss rod affects the intonation of a guitar as well as the height of the strings from the fingerboard, called the action. Some truss rod systems, called "double action" truss systems, tighten both ways, allowing the neck to be pushed both forward and backward (standard truss rods can only be released to a point beyond which the neck will no longer be compressed and pulled backward).

Classical guitars do not require truss rods as their nylon strings exert a lower tensile force with lesser potential to cause structural problems. However their necks are often reinforced with a strip of harder wood, such as an [[ebony]] strip  running down the back of a [[cedar]] neck. There is no tension adjustment on this form of reinforcement.

=== Inlays ===
{{Main|Inlay (guitar)}}

Inlays are visual elements set into the exterior surface of a guitar. The typical locations for inlay are on the fretboard, headstock, and on acoustic guitars around the soundhole, known as the [[rosette]]. Inlays range from simple plastic dots on the fretboard to intricate works of art covering the entire exterior surface of a guitar (front and back). Some guitar players have used [[LED]]s in the fretboard to produce a unique lighting effects onstage.  

Fretboard inlays are most commonly shaped like dots, diamond shapes, parallelograms, or large blocks in between the frets. Dots are usually inlaid into the upper edge of the fretboard in the same positions, small enough to be visible only to the player. These usually appear on the odd numbered frets, but also on the 12th fret (the one [[octave]] mark) instead of the 11th and 13th frets. Some older or high-end instruments have inlays made of mother of pearl, abalone, ivory, coloured wood or other exotic materials and designs. Simpler inlays are often made of plastic or painted. High-end classical guitars seldom have fretboard inlays as a well trained player is expected to know his or her way around the instrument.

In addition to fretboard inlay, the headstock and soundhole surround are also frequently inlaid. The manufacturer's logo or a small design is often inlaid into the headstock. Rosette designs vary from simple concentric circles to delicate fretwork mimicking the historic rosette of lutes. Bindings that edge the finger and sound boards are sometimes inlaid. Some instruments have a filler strip running down the length and behind the neck, used for strength and/or to fill the cavity through which the trussrod was installed in the neck.

Elaborate inlays are a decorative feature of many limited edition, high-end and custom-made guitars. Guitar manufacturers often release such guitars to celebrate significant or historic milestones.

=== Neck ===
{{Main|Neck (music)}}

A guitar's frets, fretboard, tuners, headstock, and truss rod, all attached to a long wooden extension, collectively constitute its [[neck (music)|neck]]. The wood used to make the fretboard will usually differ from the wood in the rest of the neck. The bending stress on the neck is considerable, particularly when heavier gauge strings are used (see [[Guitar#Tuning|Tuning]]), and the ability of the neck to resist bending (see [[#Truss Rod|Truss rod]]) is important to the guitar's ability to hold a constant pitch during tuning or when strings are fretted. The rigidity of the neck with respect to the body of the guitar is one determinant of a good instrument versus a poor one. The shape of the neck can also vary, from a gentle "C" curve to a more pronounced "V" curve. There are many different types of neck profiles available, giving the guitarist many options.
Some aspects to consider in a guitar neck may be the overall width of the fingerboard, scale (distance between the frets), the neck wood, the type of neck construction (for example, the neck may be glued in or bolted on), and the shape (profile) of the back of the neck. Other type of material used to make guitar necks are graphite ([[Steinberger]] guitars), aluminium ([[Kramer Guitars]], [[Travis Bean]] and [[Veleno (guitar)|Veleno guitars]]), or carbon fiber ([[Modulus Guitars]] and [[ThreeGuitars]]).

[[Double neck guitars|Double neck]] electric guitars have two necks, allowing the musician to quickly switch between guitar sounds.

=== Neck joint or 'Heel' ===
{{See also|Set-in neck|Bolt-on neck|Neck-through}}

This is the point at which the neck is either bolted or glued to the body of the guitar. Almost all acoustic steel-string guitars, with the primary exception of Taylors, have glued (otherwise known as set) necks, while electric guitars are constructed using both types. Most classical guitars have a neck and headblock carved from one piece of wood, known as a "Spanish heel."

Commonly used set neck joints include [[mortise and tenon]] joints (such as those used by CF Martin & Co. guitars), dovetail joints (also used by CF Martin on the D28 and similar models) and Spanish heel neck joints which are named after the shoe they resemble and commonly found in classical guitars. All three types offer stability. Bolt-on necks, though they are historically associated with cheaper instruments, do offer greater flexibility in the guitar's set-up, and allow easier access for neck joint maintenance and repairs.

Another type of neck, only available for solid body electric guitars, is the [[neck-through-body]] construction. These are designed so that everything from the machine heads down to the bridge are located on the same piece of wood. The sides (also known as wings) of the guitar are then glued to this central piece. Some luthiers prefer this method of construction as they claim it allows better sustain of each note. Some instruments may not have a neck joint at all, having the neck and sides built as one piece and the body built around it.

===Strings ===
{{See also|Classical guitar strings}}

Modern guitar [[strings (music)|strings]] are constructed of metal, polymers, or animal or plant product materials. 

Instruments utilising "steel" strings may have strings made of alloys incorporating steel, nickel or phosphor bronze. Classical and flamenco instruments historically used [[gut]] strings, but these have been superseded by polymer materials, such as nylon and fluorocarbon materials. Bass strings for both instruments are wound rather than monofilament.

=== Body (acoustic guitar) ===
{{See also|Sound box}}

In acoustic guitars, string vibration is transmitted through the bridge and saddle to the body via [[Sounding board|sound board]]. The sound board is typically made of tone woods such as spruce or cedar. Timbers for tone woods are chosen for both strength and ability to transfer mechanical energy from the strings to the air within the guitar body. Sound is further shaped by the characteristics of the guitar body's resonant cavity.

In electric guitars, [[transducer]]s known as [[Pick up (music technology)|pickups]] convert [[vibrating string|string vibration]] to an electric signal, which in turn is [[amplifier|amplified]] and fed to speakers, which vibrate the air to produce the sounds we hear. Nevertheless, the body of the electric guitar still performs a role in shaping the resultant tonal signature.   

In an acoustic instrument, the body of the guitar is a major determinant of the overall sound quality. The guitar top, or soundboard, is a finely crafted and engineered element made of [[tonewood]]s such as [[spruce]] and [[red cedar]]. This thin piece of wood, often only 2 or 3&nbsp;mm thick, is strengthened by differing types of [[Guitar bracing|internal bracing]]. The top is considered by many luthiers to be the dominant factor in determining the sound quality. The majority of the instrument's sound is heard through the vibration of the guitar top as the energy of the vibrating strings is transferred to it. 

Body size, shape and style has changed over time. 19th century guitars, now known as salon guitars, were smaller than modern instruments. Differing patterns of internal bracing have been used over time by luthiers. Torres, Hauser, Ramirez, Fleta, and C.F. [[C.F. Martin & Company|Martin]] were among the most influential designers of their time. Bracing not only strengthens the top against potential collapse due to the stress exerted by the tensioned strings, but also affects the resonance characteristics of the top. The back and sides are made out of a variety of timbers such as mahogany, Indian [[rosewood]] and highly regarded Brazilian rosewood (''Dalbergia nigra''). Each one is primarily chosen for their aesthetic effect and can be decorated with inlays and purfling.

The body of an acoustic guitar has a sound hole through which sound is projected. The sound hole is usually a round hole in the top of the guitar under the strings. Air inside the body vibrates as the guitar top and body is vibrated by the strings, and the response of the air cavity at different frequencies is characterised, like the rest of the guitar body, by a number of resonance modes at which it responds more strongly.  

Instruments with larger areas for the guitar top were introduced by Martin in an attempt to create louder volume levels. The popularity of the larger "[[C.F. Martin & Company|dreadnought]]" body size amongst acoustic performers is related to the greater sound volume produced.

===Body (electric guitar)===
{{See also|Solid body}}

Most electric guitar bodies are made of wood and include a plastic pick guard. Boards wide enough to use as a solid body are very expensive due to the worldwide depletion of hardwood stock since the 70's, so the wood is rarely one solid piece. Most bodies are made of two pieces of wood with some of them including a seam running down the centre line of the body. The most common woods used for electric guitar body construction include [[maple]], [[basswood]], [[Ash tree|ash]], [[poplar]], [[alder]], and [[mahogany]]. Many bodies will consist of good sounding but inexpensive woods, like ash, with a "top", or thin layer of another, more attractive wood (such as maple with a natural "flame" pattern) glued to the top of the basic wood. Guitars constructed like this are often called "flame tops". The body is usually carved or routed to accept the other elements, such as the bridge, pickup, neck, and other electronic components. Most electrics have a polyurethane or [[nitrocellulose]] lacquer finish.
Other alternative materials to wood, are used in guitar body construction. Some of these include carbon composites, plastic material (such as polycarbonate) and aluminium alloys.

===Pickups===
{{Main|Pick up (music technology)}}

[[Pick up (music technology)|Pickups]] are [[transducer]]s attached to a guitar that detect (or "pick up") string vibrations and convert the mechanical energy of the string into electrical energy. The resultant electrical signal can then be electronically [[amplifier|amplified]]. The most common type of pickup is [[Electromagnetism|electromagnetic]] in design. These contain magnets that are tightly wrapped in a coil, or coils, of copper wire. Such pickups are usually placed right underneath the guitar strings. Electromagnetic pickups work on the same principles and in a similar manner to an [[electrical generator]]. The vibration of the strings causes a small voltage to be created in the coils surrounding the magnets; this signal voltage is later amplified.

Traditional electromagnetic pickups are either [[single-coil]] or double-coil. Single-coil pickups are susceptible to noise induced from electric fields, usually mains-frequency (60 or 50 hertz) hum. The introduction of the double-coil [[humbucker]] in the mid-1950s did away with this problem through the use of two coils, one of which is wired in a reverse polarity orientation. 

The types and models of pickups used can greatly affect the tone of the guitar. Typically, humbuckers, which are two magnet–coil assemblies attached to each other are traditionally associated with a heavier sound. Single-coil pickups, one magnet wrapped in copper wire, are used by guitarists seeking a brighter, twangier sound with greater dynamic range. 

Modern pickups are tailored to the sound desired. A commonly applied approximation used in selection of a pickup is that less wire (lower DC resistance) = brighter sound, more wire = "fat" tone. Other options include specialized switching that produces coil-splitting, in/out of phase and other effects. Guitar circuits are either active, needing a battery to power their circuit, or, as in most cases, equipped with a passive circuit.

[[Fender Stratocaster]] type guitars generally utilize three single-coil pickups, while most [[Gibson Les Paul]] types use humbucker pickups.

Piezoelectric, or piezo, pickups represent another class of pickup. These employ [[piezoelectricity]] to generate the musical signal and are popular in hybrid electro-acoustic guitars. A crystal is located under each string, usually in the saddle. When the string vibrates, the shape of the crystal is distorted, and the stresses associated with this change produce tiny voltages across the crystal that can be amplified and manipulated.

Some piezo-equipped guitars use what is known as a hexaphonic pickup.  "Hex" is a prefix meaning six. In a hexaphonic pickup separate outputs are obtained from discrete piezoelectric pickups for each of the six strings. This arrangement allows the signal to be easily modified by on-board modelling electronics, as in the Line 6 Variax brand of electric guitars; the guitars allow for a variety of different sounds to be obtained by digitally manipulating the signal. This allows a guitar to mimic many vintage models of guitar, as well as output alternate tunings without the need to adjust the strings. 

Another use for hexaphonic pickups is to send the output signals to a MIDI interpretation device, which determines the note pitch, duration, attack and decay characteristics and so forth. The MIDI ([[Musical Instrument Digital Interface]]) interpreter then sends the note information to a sound bank device. The resulting sound can closely mimic numerous types of instruments.

===Electronics===
On guitars that have them, these components and the wires that connect them allow the player to control some aspects of the sound like volume or tone. These at their simplest consist of passive components such as [[potentiometer]]s and [[capacitors]], but may also include specialized [[integrated circuits]] or other active components requiring [[battery (electricity)|batteries]] for power, for preamplification and signal processing, or even for assistance in tuning. In many cases the electronics have some sort of shielding to prevent pickup of external interference and noise.

===Lining, Binding, and Purfling===

The top, back and ribs of an acoustic guitar body are very thin (1-2&nbsp;mm), so a flexible piece of wood called lining is glued into the corners where the rib meets the top and back. This interior reinforcement provides 5 to 20&nbsp;mm of solid gluing area for these corner joints. Solid linings are often used in classical guitars, while kerfed lining is most often found in steel string acoustics. Kerfed lining is also called kerfing (because it is scored, or kerfed to allow it to bend with the shape of the rib).

During final construction, a small section of the outside corners is carved or routed out and then filled with binding material on the outside corners and decorative strips of material next to the binding, which are called [[purfling]]. This binding serves to seal off the endgrain of the top and back. Purfling can also appear on the back of an acoustic guitar, marking the edge joints of the two or three sections of the back.

Binding and purfling materials are generally made of either wood or plastic.

===Bridge===
{{Main|Bridge (instrument)}}

The main purpose of the bridge on an acoustic guitar is to transfer the vibration from the strings to the soundboard, which vibrates the air inside of the guitar, thereby amplifying the sound produced by the strings.

On all electric, acoustic and original guitars, the bridge holds the strings in place on the body. There are many varied bridge designs. There may be some mechanism for raising or lowering the bridge to adjust the distance between the strings and the fretboard (action), and/or fine-tuning the intonation of the instrument. Some are spring-loaded and feature a "[[whammy bar]]", a removable arm which allows the player to modulate the pitch moving the bridge up and down. The whammy bar is sometimes also referred to as a "tremolo bar" (see [[Tremolo]] for further discussion of this term – the effect of rapidly changing pitch produced by a whammy bar is more correctly called "vibrato"). Some bridges also allow for alternate tunings at the touch of a button.

On almost all modern electric guitars, the bridge is adjustable for each string so that intonation stays correct up and down the neck. If the open string is in tune but sharp or flat when frets are pressed, the bridge can be adjusted with a screwdriver or hex key to remedy the problem. In general, flat notes are corrected by moving the bridge forward and sharp notes by moving it backwards. On an instrument correctly adjusted for intonation, the actual length of each string from the nut to the bridge saddle will be slightly but measurably longer than the [[scale length]] of the instrument. This additional length is called compensation, which flattens all notes a bit to compensate for the sharping of all fretted notes caused by stretching the string during fretting.

===Pickguard===
{{Main|Pickguard}}

Also known as a scratchplate. This is usually a piece of laminated plastic or other material that protects the finish of the top of the guitar from damage due to the use of a plectrum or fingernails. Electric guitars sometimes mount pickups and electronics on the pickguard. It is a common feature on steel-string acoustic guitars. Vigorous performance styles such as [[flamenco]], which can involve the use of the guitar as a percussion instrument, call for a scratchplate to be fitted to nylon-string instruments.

===Whammy Bar (Tremolo Arm)===
{{Main|Tremolo arm}}
Many  electric guitars are fitted with a vibrato and pitch bend device known as a "tremolo bar (or arm)", "sissy bar", "wang bar", "slam handle", "whammy handle", and "whammy bar". The latter two terms led [[stompbox]] manufacturers to use the term 'whammy' in coming up with a pitch raising effect introduced by popular guitar effects pedal brand [[Digitech]].

The tremolo arm is common enough that there is a technical term, ''hard tail'', for a guitar without one.

[[Leo Fender]], who did much to create the electric guitar, also created much confusion over the meaning of the terms "tremolo" and "vibrato" by the naming the [[Tremolo arm|"tremolo" unit]] on many of his guitars and also the [[vibrato unit|"vibrato" unit]] on his "Vibrolux" amps. In general, ''vibrato'' is a variation in [[pitch (music)|pitch]], whereas ''tremolo'' is a variation in volume, so the tremolo bar is actually a vibrato bar and the "Vibrolux" amps actually had a tremolo effect. However, following Fender's example, electric guitarists traditionally reverse these meanings when speaking of hardware devices and the effects they produce. See ''[[vibrato unit]]'' for a more detailed discussion, and ''[[tremolo arm]]'' for more of the history.

Another type of pitch bender is the [[B-Bender]], a spring and lever device mounted in an internal cavity of a solid body electric, guitar that allows the guitarist to bend just the B string of the guitar using a lever connected to the strap handle of the guitar. The resulting pitch bend is evocative of the sound of the [[pedal steel guitar]].

=== Guitar Strap ===
Strip of fabric with a [[leather]] or [[Synthetic fiber|synthetic]] [[leather]] piece on each end. Made to hold a guitar via the [[shoulders]], at an adjustable length to suit the position favoured by the guitarist.

===Self-tuning guitars===
{{Main|Tuning}}

Self-tuning guitars are computerized guitars programmed to tune themselves.  The [[Gibson Robot Guitar]], released in 2007, is often mistaken as the first of this kind, but was preceded by the Transperformance system by at least 20 years.  Gibson has also released a second, self-tuning model called the Dark Fire.{{Citation needed|date=January 2009}}
<ref>http://www.gibson.com/Products/DarkFire.aspx</ref>

==Tuning==<!-- This section is linked from [[Derek Bailey]] -->

{{Main|Guitar tuning}}
The guitar is a [[transposing instrument]]. Its pitch sounds one octave lower than it is notated on a score.

A variety of different tunings may be used. The most common tuning, known as "Standard Tuning," has the strings tuned from a low E, to a high E, traversing a two octave range – EADGBE. 

The pitches are as follows:

{| class="wikitable"
! String !! [[Scientific pitch notation|Scientific pitch]] !! [[Helmholtz pitch notation|Helmholtz pitch]] || [[Interval (music)|Interval]] from [[middle C]] || [[Frequency]]
|-
| first || E<sub>4</sub> || e' || [[major third]] above || 329.63 Hz
|-
| second || B<sub>3</sub> || b || [[minor second]] below || 246.94 Hz
|-
| third || G<sub>3</sub> || g || [[perfect fourth]] below || 196.00 Hz
|-
| fourth || D<sub>3</sub> || d  || [[minor seventh]] below || 146.83 Hz
|-
| fifth || A<sub>2</sub> || A || minor tenth below || 110 Hz
|-
| sixth || E<sub>2</sub> || E || minor thirteenth below|| 82.41 Hz
|}

The table below shows pitch names found over the six strings of a guitar in standard tuning, from the nut (zero), to the twelfth fret.

{| class="wikitable" style="width: 500px"
|-
! 0 !! 1 !! 2 !! 3 !! 4 !! 5 !! 6 !! 7 !! 8 !! 9 !! 10 !! 11 !! 12
|-
! E
| F || F♯ || G || A♭ || A || B♭ || B || C || C♯ || D || E♭ || E
|-
! B
| C || C♯ || D || E♭ || E || F || F♯ || G || A♭ || A || B♭ || B
|-
! G
| A♭ || A || B♭ || B || C || C♯ || D || E♭ || E || F || F♯ || G
|-
! D
| E♭ || E || F || F♯ || G || A♭ || A || B♭ || B || C || C♯ || D
|-
! A
| B♭ || B || C || C♯ || D || E♭ || E || F || F♯ || G || A♭ || A
|-
! E
| F || F♯ || G || A♭ || A || B♭ || B || C || C♯ || D || E♭ || E
|}

A guitar using this tuning can tune to itself using the fact, with a single exception, that the 5th fret on one string is the same note as the next open string; that is, a 5th-fret note on the sixth string is the same note as the open fifth string. The exception is the interval between the second and third strings, in which the 4th-fret note on the third string is equivalent to the open second string.

Standard tuning has evolved to provide a good compromise between simple fingering for many [[Guitar chord|chords]] and the ability to play common scales with minimal left hand movement. Uniquely, the guitar's tuning allows for repeatable patterns which also facilitates the ease in which common scales can be played.<ref name="Between the Licks">{{cite web |title=One Pattern To Rule Them All  |publisher=Between the Licks |date=2008-04-13 |accessdate=2008-07-02 |url=http://betweenthelicks.com/jazz-theory/one-pattern-to-rule-them-all}}</ref> There are also a variety of commonly used [[guitar tuning|alternate tunings]] – most of which are [[guitar tuning|open tunings]] that create entire chord voicings without fretting any strings. Many open tunings, where all of the strings are tuned to a similar note or chord, are popular for slide guitar playing. Alternate tunings are used for two main reasons: the ease of playing and the variation in tone that can be achieved.

Many guitarists use a long established, centuries-old tuning variation where the lowest string is 'dropped' down a [[Major second|whole tone]]. Known as [[Drop-D]] (or dropped D) tuning it is, from low to high, DADGBE. This allows for open string tonic and dominant basses in the keys of D and D minor. It also enables simple fifths (powerchords) to be more easily played. [[Edward Van Halen|Eddie Van Halen]] sometimes uses a device known as a 'D Tuna,' the patent for which he owns. It is a small lever, attached to the fine tuner of the 6th string on a Floyd Rose tremolo, which allows him to easily drop that string's tuning to a D. Many contemporary rock bands retune all strings by several semi-tones, making, for example, Drop-C or Drop-B tunings, However this terminology is inconsistent with that of "drop-D" as "drop-D" refers to dropping a single string to the named pitch. Often these new tunings are also simply referred to as the "Standard" of the note in question e.g. – "D Standard" (DGcfad').  

Some guitarists tune in straight fourths, avoiding the major third between the third and second strings. While this makes playing major and minor triads slightly more difficult, it facilitated playing chords with more complicated extended structures{{Citation needed|date=December 2007}}. One proponent of the straight fourth tuning (EADGCF) is [[Stanley Jordan]].

As with all stringed instruments a large number of [[scordatura]] are possible on the guitar. A common form of scordatura involves tuning the 3rd string to F{{music|#}} to mimic the standard tuning of the [[lute]], especially when playing renaissance repertoire originally written for the lute.

==Guitar accessories==
Though a guitar may be played on its own, there are a variety of common accessories used for holding and playing the guitar.

=== Capotasto ===

{{Main|Capo}}

A capo (short for ''capotasto'') is used to change the pitch of open strings. Capos are clipped onto the fret board with the aid of spring tension, or in some models, elastic tension. To raise the guitar's pitch by one semitone, the player would clip the capo onto the fret board just below the first fret. Its use allows players to play in different keys without having to change the chord formations they use. Because of the ease with which they allow guitar players to change keys, they are sometimes referred to as "cheaters" or the "hillbilly crutch." Classical performers are known to use them to enable modern instruments to match the pitch of historical instruments such as the renaissance [[lute]].

=== Slides ===
{{Main|Slide Guitar}}
A [[Slide guitar|slide]], (neck of a bottle, knife blade or round metal bar) used in blues and rock to create a [[glissando]] or '[[Lap steel guitar|Hawaiian]]' effect. The necks of bottles were often used in blues and country music. Modern slides are constructed of glass, plastic, ceramic, chrome, brass or steel, depending on the weight and tone desired. An instrument that is played exclusively in this manner, (using a metal bar) is called a [[steel guitar]] or [[pedal steel]]. Slide playing to this day is very popular in [[blues|blues music]] and [[country music]]. Some slide players use a so called [[Dobro]] guitar. 

Some performers that have become famous for playing slide are [[Robert Johnson (musician)|Robert Johnson]], [[Elmore James]], [[Ry Cooder]], [[George Harrison]], [[Bonnie Raitt]], [[Derek Trucks]], [[Warren Haynes]], [[Duane Allman]], [[Muddy Waters]], [[Rory Gallagher]], and [[George Thorogood]].

=== Plectrum ===
{{Main|Guitar pick}}
[[Image:Guitar picks-KayEss-1.jpeg|thumb|right|120px|A variety of guitar picks]]A "[[guitar pick]]" or "[[plectrum]]" is a small piece of hard material which is generally held between the thumb and first finger of the picking hand and is used to "pick" the strings. Though most classical players pick solely with their finger nails, the "pick" is often used for electric and some acoustic guitars. Though today they are mainly plastic, variations do exist, such as bone, wood, steel or tortoise shell. Tortoise shell was the most commonly used material in the early days of pick making but as tortoises became more and more endangered, the practice of using their shells for picks or anything else was banned. Tortoise shell picks are often coveted for a supposedly superior tone and ease of use.

Picks come in many shapes and sizes. Picks vary from the small jazz pick to the large bass pick. The thickness of the pick often determines its use. A thinner pick (between .2 and .5&nbsp;mm) is usually used for strumming or rhythm playing, whereas thicker picks (between .7 and 1.5+ mm) are usually used for single-note lines or lead playing. The distinctive guitar sound of [[Billy Gibbons]] is attributed to using a [[quarter (United States coin)|quarter]] or [[peso]] as a pick. Similarly, [[Brian May]] is known to use a [[British sixpence coin|sixpence coin]] as a pick. David Persons is known for using old credit cards, cut to the correct size, as plectrum.

Thumb picks and finger picks that attach to the finger tips are sometimes employed in finger-picking styles.

== Notes ==
{{reflist}}

== See also ==
{{Guitar}}

<div style="-moz-column-count:3; column-count:3;">
* [[3rd Bridge]]
* [[Acoustic guitar]]
* [[Classical guitar]]
* [[Electric guitar]]
* [[Flamenco guitar]]
* [[Fretless guitar]]
* [[G-sharp guitar]]
* [[Guitar amplifier]]
* [[Guitar effects]]
* [[Guitar harmonics]]
* [[Guitar solo]]
* [[Guitjo (double-neck)|Double-neck guitjo]]
* [[List of compositions for guitar]]
* [[List of guitar manufacturers]]
* [[List of guitarists]]
* [[Luthier]]
* [[Octave twelve]]
* [[Prepared guitar]]
* [[Steel-string acoustic guitar]]
* [[Stringed instrument tunings]]
* [[Tablature]]
* [[Tonewood]]
</div>

== External links ==
{{sisterlinks}}
* [http://www.bsmny.org/features/iidguitar/index.php Instruments In Depth: The Guitar] An online feature from Bloomingdale School of Music (October, 2007)
* [http://www3.uakron.edu/gfaa/stalking.html Stalking the Oldest Six-String Guitar]
* [http://www.bsharp.org/physics/guitar Guitar physics]
* [http://library.csun.edu/igra/ International Guitar Research Archive]
* [http://www.metmuseum.org/toah/hd/guit/hd_guit.htm The Guitar], Heilbrunn Timeline of Art History, [[The Metropolitan Museum of Art]] featuring many historic guitars from the Museum's collection


{{Guitars}}

[[Category:Guitars]]
[[Category:String instruments]]
[[Category:Celtic musical instruments]]
[[Category:Irish musical instruments]]

{{Link FA|mk}}

[[af:Kitaar]]
[[als:Gitarre]]
[[ang:Ȝitārre]]
[[ar:قيثارة]]
[[an:Guitarra]]
[[ast:Guitarra]]
[[gn:Mbaraka]]
[[az:Gitara]]
[[bm:Gitari]]
[[bn:গীটার]]
[[zh-min-nan:Gí-tah]]
[[be-x-old:Гітара]]
[[bo:རྒྱུད་དྲུག]]
[[bs:Gitara]]
[[br:Gitar]]
[[bg:Китара]]
[[ca:Guitarra]]
[[cs:Kytara]]
[[cy:Gitâr]]
[[da:Guitar]]
[[de:Gitarre]]
[[et:Kitarr]]
[[el:Κιθάρα]]
[[es:Guitarra]]
[[eo:Gitaro]]
[[eu:Gitarra]]
[[fa:گیتار]]
[[fr:Guitare]]
[[fy:Gitaar]]
[[gl:Guitarra]]
[[ko:기타]]
[[hi:गिटार]]
[[hr:Gitara]]
[[io:Gitaro]]
[[id:Gitar]]
[[os:Гитарæ]]
[[is:Gítar]]
[[it:Chitarra]]
[[he:גיטרה]]
[[jv:Gitar]]
[[kl:Guitar]]
[[kn:ಗಿಟಾರ್]]
[[ka:გიტარა]]
[[la:Cithara Hispanica]]
[[lv:Ģitāra]]
[[lt:Gitara]]
[[jbo:jgita]]
[[hu:Gitár]]
[[mk:Гитара]]
[[ml:ഗിറ്റാര്‍]]
[[mr:गिटार]]
[[arz:جيتار]]
[[mzn:گیتار]]
[[ms:Gitar]]
[[my:ဂစ်တာ]]
[[nah:Mecahuēhuētl]]
[[nl:Gitaar]]
[[nds-nl:Gitaar]]
[[ja:ギター]]
[[no:Gitar]]
[[nn:Gitar]]
[[nrm:Dgitare]]
[[uz:Gitara]]
[[pl:Gitara]]
[[pt:Guitarra]]
[[ro:Chitară]]
[[qu:Kitara]]
[[ru:Гитара]]
[[sq:Kitara]]
[[scn:Chitarra acustica]]
[[simple:Guitar]]
[[sk:Gitara]]
[[sl:Kitara]]
[[sr:Гитара]]
[[sh:Gitara]]
[[fi:Kitara]]
[[sv:Gitarr]]
[[tl:Gitara]]
[[ta:கிதார்]]
[[te:గిటారు]]
[[th:กีตาร์]]
[[tr:Gitar]]
[[uk:Гітара]]
[[vec:Chitara]]
[[vi:Ghi-ta]]
[[war:Sista]]
[[zh-yue:結他]]
[[bat-smg:Gėtara]]
[[zh:吉他]]