Guitar tunings

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Guitar tunings assign pitches to the open strings of guitars, including acoustic guitars, electric guitars and classical guitars, among others. Tunings can be described by the particular pitches that are denoted by notes in Western music. By convention, the notes are ordered from lowest-pitched string (i.e., the deepest bass note) to the highest-pitched (thickest string to the thinnest).

The phrase "guitar tuning" also refers to the adjusting of the string-pitches to their desired tuning to a reference pitch-often a note from a piano or Hammond organ and/or tuning the guitar strings so that the strings are in tune relative to each other. Tuning is described in how-to manuals for guitarists.

Standard tuning defines the string pitches as E, A, D, G, B, and E, from lowest (low E₂) to highest (high E₄). Standard tuning is used by most guitarists, and frequently used tunings can be understood as variations on standard tuning. "Nonstandard" tunings are also called "alternative" or "alternate". Some tunings are used for particular songs by professional musicians, and may be called after the song's title. There are hundreds of such tunings, which are often minor variants of established tunings. Communities of guitarists who share a musical tradition often use the same or similar tunings.

The hundreds of alternative tunings have been classified into a smaller number of categories: "open", both major and minor ("crossnote"), and "modal"; "dropped" (in which the pitch of one or more strings is lowered); "instrumental" (based on other stringed instruments); and "regular". Modal, dropped, and many other tunings are mentioned in the supplementary list of guitar tunings.

Joni Mitchell developed a shorthand descriptive method of noting guitar tuning wherein the first letter documents the note of the lowest string and is followed by the relative fret (half step) offsets required to obtain the pitch of the next [higher] string This scheme highlights pitch relationships and simplifies the process of comparing different tuning schemes.

Video Guitar tunings

Standard and alternatives

Standard

Standard tuning is the tuning most frequently used on a six-string guitar and musicians assume this tuning by default if a specific alternate or scordatura is not mentioned. It consists of the following notes:

E₂-A₂-D₃-G₃-B₃-E₄.

The letter gives the pitch name of each note, and the number indicates in which octave the pitch lies. This system is called scientific pitch notation (aka American Standard Pitch Notation), and ties each letter/number combination to a specific frequency:

In some regions of Europe where classical musicians use the German system, the B natural is indicated with the letter H: in this system, H is B? (B natural), and B is B? (B flat). The guitar is a transposing instrument--music for it is notated one octave higher than actual sounding pitch, to reduce the need for ledger lines in music written for the instrument, and simplify reading.

The fifth string (A₂) is tuned to 110 Hz, exactly two octaves below the standard orchestral reference pitch of 440 Hz (A440). Tuning forks and electronic tuners that match these frequencies are commonly available, so a properly tuned fifth string can provide a reference to tune the remaining strings by ear. Tuning forks which provide the pitch of the high E string (329.63 Hz) are also common.

The guitar is conventionally an equal-tempered instrument. The frets are positioned logarithmically, creating equally-tempered pitches along each string. However, guitarists who tune by ear will typically tune "clean" so that dissonant beating between particular strings is minimized. In this way, open intervals can be more consonant. This is known as just intonation, which is at variance with equal temperament. When the guitar is tuned in this way, open tunings theoretically allow for certain chords to be more consonant.

Standard tuning provides reasonably simple fingering (left hand movement) for playing standard scales and basic chords in all major and minor keys. The separation of the first (high E) and second (B) string, as well as the separation between the third (G), fourth (D), fifth (A), and sixth (low E) strings by a five-semitone interval (a perfect fourth) allows notes of the chromatic scale to be played with each of the four fingers of the left hand controlling one of the first four frets (index finger on fret 1, little finger on fret 4, etc.) only when the hand is in the first position; otherwise, the four fingers must stretch to cover five frets.

The open notes of the second (B) and third (G) strings are separated by a four-semitone interval (a major third). This tuning pattern of (low) fourths, one major-third, and one fourth was inherited by the guitar from its predecessor instrument, the viol. On the other hand, the irregular major third breaks the fingering patterns of scales and chords, so that guitarists have to memorize multiple chord-shapes for each chord. Scales and chords are simplified by major thirds tuning and all-fourths tuning, which are regular tunings maintaining the same musical interval between consecutive open-string notes.

Alternative

Alternative ("alternate") tuning refers to any open-string note arrangement other than standard tuning. Such alternative tuning arrangements offer different sonorities, chord voicings, and fingerings. Alternative tunings are common in folk music, where the guitar may emulate various ethnic instruments and tunings, and may be called upon to produce drones. Alternative tunings necessarily change the fingering shapes of common chords associated with standard tuning, which eases the playing of some nonstandard chords at the cost of increasing the difficulty of some standard chords.

Some tunings are used for particular songs by professional musicians, and may be named after the song's title. There are hundreds of such tunings, which are often minor variants of other alternate tunings. A few alternative tunings are used regularly by communities of guitarists who share a musical tradition, such as American folk or Celtic folk music.

The hundreds of alternative tunings have been classified into a smaller number of categories: dropped, open, both major and minor (cross note), modal, instrumental (based on other stringed instruments), and miscellaneous ("special").

String gauges

Some alternative tunings are difficult or even impossible to achieve with conventional sets of guitar strings, which have gauges optimized for standard tuning. With conventional sets, some higher tunings increase string-tension until playing requires more finger-strength and stamina or even until a string snaps or the guitar is warped; with lower tunings, strings may be loose and buzz. Therefore, many alternative tunings benefit from re-stringing of the guitar with string gauges chosen to optimize particular tunings by using lighter strings for higher notes (to lower tension) and heavier strings for lower notes (to prevent string buzz); tone is also negatively affected by incorrect string gauge choice.

Maps Guitar tunings

Dropped tunings

A dropped tuning starts with standard tuning and typically lowers the pitch ("drops") of only a single string, or (rarely) two strings. This is almost always the lowest pitched (E) string on the guitar, although occasionally the A string may be lowered. The Drop D tuning, for example, is common in classical guitar and heavy metal music. For it, the low E string is tuned down one whole step, to a low D, and the rest of the guitar remains in standard tuning. This creates an 'open power chord' (three-note fifth) with the low three strings (DAD). Many heavy rock guitarists have adopted a "Low C" tuning by either dropping the low string 2 whole steps to a C, or a Drop D tuning another whole step down across all strings. In most cases, Drop C requires a heavier gauge string to maintain tone and prevent buzzing against the frets.

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Open tunings

An open tuning allows a chord to be played by strumming the strings when "open" (no strings fretted). Open tunings may be either chordal or modal. In chordal open tunings the base chord consists of at least three different pitch classes, and may include all the strings or a subset. The tuning is named for the base chord when played open, typically a major chord, and all similar chords in the chromatic scale can then be played by barring all strings across a single fret. Open tunings are common in blues and folk music. These tunings are frequently used in the playing of slide and lap-slide ("Hawaiian") guitars, and Hawaiian slack key music. Ry Cooder uses open tunings when he plays slide guitar.

Equal temperament is used in modern music because it facilitates the playing of music in any key, as compared to just intonation which favors only a few certain keys, all other keys sounding more or less "out of tune". Open tunings, however, can be an exception:

Relative to the 'pure' thirds in the overtone series, equal-temperament widens the major third by an all-too audible 14 cents, and it narrows the minor third by an even more horrifying 16 cents (1 cent is one hundredth (1 percent) of a semitone). So, the 3 note (f?) of a D-major chord, and the ?3 note (f) of a D minor chord, may well sound a lot better / more pleasing to the ear if they are adjusted downward or upward, respectively. Unfortunately, making such an adjustment in standard tuning -- and in most other tunings -- is inadmissible, because it's not possible to tune the notes sounded on a particular string individually; adjusting the intonation of a string affects the intonation of all of the notes which lie 'under' it ... some of which will be the 1, 4, and 5 notes of other chords. Since these notes are not displaced (or are only slightly displaced) by even-temperament, any adjustment to 'improve' the intonation of a 3 note in one chord will just throw other chords badly out-of-tune.

Our 'open' tunings (ones whose open strings form a simple chord) are the one exception to this rule. To the extent that we play with a slide (like the Delta blues players) or with one barred finger or some other grip (Keith Richards) that is essentially just moved up and down the neck... then the 3 of the chord can be tuned more or less "pure", as in the holy overtone series. In open-G tuning (G G D G B D), the 3 (b) of the open-G major-triad is on string 2. If we barre or use a slide to play the IV chord (C) at fret 5, the 3 of that chord (e) is still on string 2... as it will be when we slide up to the V chord, or the ?VII chord, or the octave. As long as we don't wantonly introduce other chord shapes, our adjustment to string 2 won't break anything. If we're playing with a slide, this is more or less guaranteed.

Open tunings allow "better" intonation of certain chords than non-open tunings, because they allow the open strings to be placed in just intonation, reducing the 'error' of thirds in equal temperaments tuning. For example, in the open-G overtones tuning G-G-D-G-B-D, the (G,B) interval is a major third, and of course each successive pair of notes on the G- and B-strings is also a major third; similarly, the open-string minor-third (B,D) induces minor thirds among all the frets of the B- and D- strings. Of all the intervals in equal temperament, the thirds have the largest deviation in comparison to those of just intonation:

Sonny Landreth, Keith Richards and other open-G masters often lower the second string slightly so the major third is in tune with the overtone series. This adjustment dials out the dissonance, and makes those big one-finger major-chords come alive.

Repetitive open-tunings are used for two classical non-Spanish guitars. For the English guitar, the open chord is C major (C-E-G-C-E-G); for the Russian guitar, which has seven strings, G major (G-B-D-G-B-D-G). Mixing a perfect fourth and a minor third along with a major third, these tunings are on-average major-thirds regular-tunings. While on-average major-thirds tunings are conventional open tunings, properly major-thirds tunings are unconventional open-tunings, because they have augmented triads as their open chords.

When the open strings constitute a minor chord, the open tuning may sometimes be called a cross-note tuning.

Major key tunings

Major open-tunings give a major chord with the open strings.

Open tunings often tune the lowest open note to C, D, or E and they often tune the highest open note to D or E; tuning down the open string from E to D or C avoids the risk of breaking strings, which is associated with tuning up strings. The most popular open tunings have the open-string patterns

R-5-R-5-R-3 (Open C),

R-5-R-3-5-R (Open D and E),

5-R-5-R-3-5 (Open G)

where R, 3, and 5 represent the major triad's root, major third, or perfect fifth. In these tunings, the root is repeated thrice or twice, and the perfect fifth twice or thrice; the major third once. In repetitive open tunings, the open major triad's major third is doubled; in non-repetitive open tunings, the major third is not doubled. A seventh chord is often played by omitting the highest perfect fifth; when a perfect fifth or other notes are omitted from a chord, the major-third note is retained.

Open D

The Open D tuning D-A-D-F?-A-D, also called "Vestopol" tuning, is one of the most common open tunings used by European and American guitarists working with alternate tunings. There are countless recorded examples, including Joni Mitchell ("Big Yellow Taxi"), Bruce Cockburn ("Sunwheel Dance"), Leo Kottke (many of his slide tunes), John Fahey (multiple tunes) and many others. The popular Allman Brothers instrumental "Little Martha" used an open D tuning raised one half step, giving an open E? tuning with the same intervalic relationships as open D.

Open C

The English guitar used a repetitive open-C tuning (with distinct open notes C-E-G-C-E-G) that approximated a major-thirds tuning. The C-G-C-G-C-E tuning was used by William Ackerman for his "Townsend Shuffle" and by John Fahey for his tribute to Mississippi John Hurt.

The C-C-G-C-E-G tuning uses some of the harmonic sequence (overtones) of the note C. When an open-note C-string is struck, its harmonic sequence begins with the notes C, C, G, C, E, G, B?, C. This overtone-series tuning was modified by Mick Ralphs, who used a high C rather than the high G for "Can't Get Enough" on Bad Company. Ralphs said, "It needs the open C to have that ring," and "it never really sounds right in standard tuning". Ralphs wrote these songs in the key of G on a guitar in Open-G tuning.

Open G

Mick Ralphs' open-C tuning was originally an open-G tuning, which listed the initial six overtones of the G note, namely G-G-D-G-B-D; Ralphs used this open-G tuning for "Hey Hey" and while writing the demo of "Can't Get Enough".

The open G tuning G-G-D-G-B-D was used by Joni Mitchell for "Electricity", "For the Roses" and "Hunter (The Good Samaritan)". Truncating this tuning to G-D-G-B-D for his five-string guitar, Keith Richards plays this overtones-tuning on The Rolling Stones's "Honky Tonk Women", "Brown Sugar" and "Start Me Up".

The Russian guitar uses the open-G tuning D-G-B-D-G-B-D, which contains mostly major and minor thirds.

Creating any kind of open tuning

Any kind of chordal tuning can be achieved, simply by using the notes in the chord and tuning the strings to those notes. For example, A_sus4 has the notes A, D, E. By tuning the strings to only those notes, it creates a chordal A^sus4 tuning. Since power chords only use two notes, fifth chord tuning use repeats of those two notes.

(These are open chordal tunings for guitar, but bass players can also use them by omitting the last two strings.)

Minor or "cross-note" tunings

Cross-note tunings include a minor third, so giving a minor chord with open strings. Fretting the minor-third string at the first fret produces a major-third, so allowing a one-finger fretting of a major chord. By contrast, it is more difficult to fret a minor chord using an open major-chord tuning.

Cross-note E-minor was used by Bukka White and Skip James.

Other open chordal tunings

Some guitarists have opted for open tunings which use more complex chords, which give them more available intervals on the open strings. C⁶, E⁶, E⁷, E^6/9 and other such tunings are common among lap-steel players such as Hawaiian slack-key guitarists and country guitarists, and are also sometimes applied to the regular guitar by bottleneck players striving to emulate these styles. A common C⁶ tuning, for example, is C-E-G-A-C-E, which provides open major and minor thirds, open major and minor sixths, fifths, and octaves. By contrast, most open major or open minor tunings provide only octaves, fifths, and either a major third/sixth or a minor third/sixth--but not both. Don Helms of Hank Williams band favored C⁶ tuning; slack-key artist Henry Kaleialoha Allen uses a modified C^6/7 (C⁶ tuning with a B? on the bottom); Harmon Davis favored E⁷ tuning; David Gilmour has used an open G⁶ tuning.

Modal tunings

Modal tunings are open tunings in which the open strings of the guitar do not produce a tertian (i.e., major or minor, or variants thereof) chord. The strings may be tuned to exclusively present a single interval (all fourths; all fifths; etc.) Or they may be tuned to a non-tertian chord (unresolved suspensions such as E-A-B-E-A-E, for example). Modal open tunings may use only one or two pitch classes across all strings (as, for example, some metal guitarists who tune each string to either E or B, forming "power chords" of ambiguous major/minor tonality).

Popular modal tunings include D Modal (D-G-D-G-B-E) and C Modal (C-G-D-G-B-D).

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Regular tunings

For the standard tuning, there is exactly one interval of a major third between the second and third strings, and all the other intervals are fourths. The irregularity has a price. Chords cannot be shifted around the fretboard in the standard tuning E-A-D-G-B-E, which requires four chord-shapes for the major chords. There are separate chord-forms for chords having their root note on the third, fourth, fifth, and sixth strings.

In contrast, regular tunings have equal intervals between the strings, and so they have symmetrical scales all along the fretboard. This makes it simpler to translate chords. For the regular tunings, chords may be moved diagonally around the fretboard. The diagonal movement of chords is especially simple for the regular tunings that are repetitive, in which case chords can be moved vertically: Chords can be moved three strings up (or down) in major-thirds tuning and chords can be moved two strings up (or down) in augmented-fourths tuning. Regular tunings thus appeal to new guitarists and also to jazz-guitarists, whose improvisation is simplified by regular intervals.

On the other hand, five- and six-string open chords ("cowboy chords") are more difficult to play in a regular tuning than in standard tuning. Instructional literature uses standard tuning. Traditionally a course begins with the hand in first position, that is, with the left-hand covering frets 1-4. Beginning players first learn open chords belonging to the major keys C, G, and D. Guitarists who play mainly open chords in these three major-keys and their relative minor-keys (Am, Em, Bm) may prefer standard tuning over many regular tunings, On the other hand, minor-thirds tuning features many barre chords with repeated notes, properties that appeal to acoustic-guitarists and beginners.

Major thirds and perfect fourths

Standard tuning mixes a major third (M3) with its perfect fourths. Regular tunings that are based on either major thirds or perfect fourths are used, for example, in jazz.

All fourths tuning E₂-A₂-D₃-G₃-C₄-F₄ keeps the lowest four strings of standard tuning, changing the major third to a perfect fourth. Jazz musician Stanley Jordan stated that all-fourths tuning "simplifies the fingerboard, making it logical".

Major-thirds tuning (M3 tuning) is a regular tuning in which the musical intervals between successive strings are each major thirds, for example E₂-G?₂-C₃-E₃-G?₃-C₄. Unlike all-fourths and all-fifths tuning, M3 tuning repeats its octave after three strings, which simplifies the learning of chords and improvisation. This repetition provides the guitarist with many possibilities for fingering chords. With six strings, major-thirds tuning has a smaller range than standard tuning; with seven strings, the major-thirds tuning covers the range of standard tuning on six strings.

Major-thirds tunings require less hand-stretching than other tunings, because each M3 tuning packs the octave's twelve notes into four consecutive frets. The major-third intervals allow major chords and minor chords to be played with two-three consecutive fingers on two consecutive frets.

Chord inversion is especially simple in major-thirds tuning. Chords are inverted simply by raising one or two notes three strings. The raised notes are played with the same finger as the original notes. In contrast, inversions of triads in standard and all-fourths tuning require three fingers on a span of four frets, in standard tuning, the shape of inversions depends on the involvement of the irregular major-third.

All fifths and "new standard tuning"

C₂-G₂-D₃-A₃-E₄-B₄

All-fifths tuning is a tuning in intervals of perfect fifths like that of a mandolin or a violin; other names include "perfect fifths" and "fifths". It has a wide range. Its implementation has been impossible with nylon strings and has been difficult with conventional steel strings. The high B makes the first string very taut, and consequently a conventionally gauged string would easily break.

A variation of all-fifths tuning was used by jazz-guitarist Carl Kress. The bottom four strings are tuned in fifths and the top two strings tuned in thirds resulting in Bb-F-C-G-B-D. This results in tenor banjo formations on the bottom four strings and plectrum banjo formations on the top four strings. This tuning is also used by contemporary New York jazz-guitarist Marty Grosz.

All-fifths tuning has been approximated by the so-called "New Standard Tuning" (NST) of King Crimson's Robert Fripp, which NST replaces all-fifths' high B with a high G. To build chords, Fripp uses "perfect intervals in fourths, fifths and octaves", so avoiding minor thirds and especially major thirds, which are sharp in equal temperament tuning (in comparison to thirds in just intonation). It is a challenge to adapt conventional guitar-chords to new standard tuning, which is based on all-fifths tuning. Some closely voiced jazz chords become impractical in NST and all-fifths tuning.

Instrumental tunings

These are tunings in which some or all of the strings of the guitar are retuned to emulate the standard tuning of some other instrument, such as a lute, banjo, cittern, mandolin, etc. Many of these tunings will overlap other categories, especially open and model tunings.

Miscellaneous or "special" tunings

This category includes everything that does not fit into any of the other categories, for example (but not limited to): tunings designated only for a particular piece; non-western intervals and modes; micro- or macro-tones; and "hybrid tunings" combining features of major alternate tuning categories - most commonly an open tuning with the lowest string dropped.

Notes

Citation references

References

Allen, Warren (22 September 2011) [30 December 1997]. "WA's encyclopedia of guitar tunings". (Recommended by Marcus, Gary (2012). Guitar zero: The science of learning to be musical. Oneworld. p. 234. ISBN 9781851689323. ). Retrieved 27 June 2012.
Denyer, Ralph (1992). "Playing the guitar ('How the guitar is tuned', pp. 68-69, and 'Alternative tunings', pp. 158-159)". The guitar handbook. Special contributors Isaac Guillory and Alastair M. Crawford (Fully revised and updated ed.). London and Sydney: Pan Books. pp. 65-160. ISBN 0-330-32750-X.
Griewank, Andreas (1 January 2010), Tuning guitars and reading music in major thirds, Matheon preprints, 695, Rosestr. 3a, 12524 Berlin, Germany: DFG research center "MATHEON, Mathematics for key technologies" Berlin, urn:nbn:de:0296-matheon-6755. Postscript file and Pdf file, archived from the original on 8 November 2012
Grossman, Stefan (1972). The book of guitar tunings. New York: Amsco Publishing Company. ISBN 0-8256-2806-7. LCCN 74-170019.
Peterson, Jonathon (2002). "Tuning in thirds: A new approach to playing leads to a new kind of guitar". American Lutherie: The Quarterly Journal of the Guild of American Luthiers. 8222 South Park Avenue, Tacoma WA 98408: USA.: The Guild of American Luthiers. 72 (Winter): 36-43. ISSN 1041-7176. Archived from the original on 21 October 2011. Retrieved 9 October 2012.
Roche, Eric (2004). "5 Thinking outside the box". The acoustic guitar Bible. London: Bobcat Books Limited, SMT. pp. 151-178. ISBN 1-84492-063-1.
Sethares, Bill (2001). "Regular tunings". Alternate tuning guide (PDF). Madison, Wisconsin: University of Wisconsin; Department of Electrical Engineering. pp. 52-67. Retrieved 19 May 2012.
Sethares, Bill (2009) [2001]. Alternate tuning guide (PDF). Madison, Wisconsin: University of Wisconsin; Department of Electrical Engineering. Retrieved 19 May 2012.
Sethares, William A. (2011). "Alternate tuning guide". Madison, Wisconsin: University of Wisconsin; Department of Electrical Engineering. Retrieved 19 May 2012.
Weissman, Dick (2006). Guitar tunings: A comprehensive guide. Routledge. ISBN 9780415974417. LCCN 0415974410.

External links

Allen, Warren (22 September 2011) [30 December 1997]. "WA's encyclopedia of guitar tunings". (Recommended by Marcus, Gary (2012). Guitar zero: The science of learning to be musical. Oneworld. p. 234. ISBN 9781851689323. ). Retrieved 27 June 2012.
Sethares, William A. (12 May 2012). "Alternate tuning guide: Interactive". Uses Wolfram Cdf player. Retrieved 27 June 2012.
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Guitar tunings

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Guitar tunings

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