Major thirds tuning

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Major thirds
Trivial (0)
Minor thirds (3)
Major thirds (4)
All fourths (5)
Augmented fourths (6)
New standard (7, 3)
All fifths (7)
Minor sixths (8)
Guitar tunings

Among

open strings is a major third ("M3" in musical abbreviation).[1] Other names for major-thirds tuning include major-third tuning, M3 tuning, all-thirds tuning, and augmented tuning. By definition, a major-third interval separates two notes that differ by exactly four semitones (one-third of the twelve-note octave
).

The Spanish guitar's tuning mixes four perfect fourths (five semitones) and one major-third, the latter occurring between the G and B strings:

E–A–D–G–B–E.

This tuning, which is used for acoustic and electric guitars, is called "standard" in English, a convention that is followed in this article. While standard tuning is irregular, mixing four fourths and one major third, M3 tunings are regular: Only major-third intervals occur between the successive strings of the M3 tunings, for example, the

open augmented C
tuning.

G♯–C–E–G♯–C–E.

For each M3 tuning, the open strings form an augmented triad in two octaves.

For guitars with six strings, every major-third tuning repeats its three open-notes in two octaves, so providing many options for fingering chords. By repeating open-string notes and by having uniform intervals between strings, major-thirds tuning simplifies learning by beginners. These features also facilitate advanced guitarists' improvisation,[2][3] precisely the aim of jazz guitarist Ralph Patt when he began popularizing major-thirds tuning between 1963 and 1964.

Avoiding standard tuning's irregular intervals

The fretboard of major-thirds tuning is segmented into four-fret intervals, frets 0–3, 4–7, and 8–11; the natural notes are labeled.
M3 tuning partitions its fretboard into four-fret segments.

In standard tuning, the successive open-strings mix two types of intervals, four perfect-fourths and the major third between the G and B strings:

E2–A2–D3–G3–B3–E4.

Only major thirds occur as open-string intervals for major-thirds tuning, which is also called "major-third tuning",[4][5] "all-thirds tuning",[6] and "M3 tuning".[7] The most viable M3 tunings are:

  • E2-G#2-C3-E3-G#3-C4
  • F2-A2-C#3-F3-A3-C#4
  • F#2-A#2-D3-F#3-A#3-D4
  • G2-B2-D#3-G3-B3-D#4
  • G#2-C3-E3-G#3-C4-E4

All of these tunings reduce the overall range of the instrument a bit: the first takes a M3 off the top of the range, and the last takes a M3 off the bottom of the range. One popular M3 tuning has the open strings:

G♯2–C3–E3–G♯3–C4–E4,[4][8]

which some guitarists have applied to the top six strings of a

seven string guitar, with the low seventh string tuned to the low E, to restore the standard E–E range.[8][9]
While M3 tuning can use standard sets of guitar strings,
gauges have been recommended.[6][10]
The middle tunings are a compromise, each losing a note or two off both the top and the bottom of the range. For example, for six-string guitars, the M3 tuning:

F♯2–A♯2–D3–F♯3–A♯3–D4

loses the two lowest semitones on the low-E string and the two highest semitones from the high-E string in standard tuning; it can use string sets for standard tuning.[8]

Note that regardless of which note is chosen to start the tuning sequence, there are only four distinct sets of open-note pitch classes. The major-thirds tunings respectively have the open notes : {E, G#, C}, {F, A, C#},[5] {F#, A#, D}, and {G, B, D#}[8][5]

Properties

Minor, major, and seventh chords are played with the same shape on two to three consecutive frets.
Shifting a chord by three strings raises it by one octave.
The C major chord and its first and second inversions. In the first inversion, the C note has been raised 3 strings on the same fret. In the second inversion, both the C note and the E note have been raised 3 strings on the same fret.
Chords are inverted by shifting notes by three strings on their original frets.

Major-thirds tunings require less hand-stretching than other tunings, because each M3 tuning packs the octave's twelve notes into four consecutive frets.[2][11] The major-third intervals allow major chords and minor chords to be played with two–three consecutive fingers on two consecutive frets.[12] Every major-thirds tuning is regular and repetitive, two properties that facilitate learning by beginners and improvisation by advanced guitarists.[2][3][13]

Four frets for the four fingers

In major-thirds tuning, the

fingerboard of classical guitar,[9] which has exactly 12 frets.[note 1]

Only two or three frets are needed for the

fourths, sevenths, and ninths—are played on only three successive frets.[12]
For fundamental-chord fingerings, major-thirds tuning's simplicity and consistency are not shared by standard tuning, whose seventh-chord fingering is discussed at the end of this section.

Repetition

Each major-thirds tuning

all-fifths tuning.[3]

Chord inversion is especially simple in major-thirds tuning. Chords are inverted simply by raising one or two notes by three strings. The raised notes are played with the same finger as the original notes. Thus, major and minor chords are played on two frets in M3 tuning even when they are inverted. In contrast, inversions of chords in standard tuning require three fingers on a span of four frets,[17] in standard tuning, the shape of inversions depends on the involvement of the irregular major-third.[18]

Regular musical intervals

C major chords in standard and M3 tunings[note 1]

In each

all-fifths tunings. For each regular tuning, chord patterns may be moved around the fretboard,[13] a property that simplifies beginners' learning of chords and advanced players' improvisation.[2][3][13]

In contrast, chords cannot be shifted around the fretboard in standard tuning, which requires four chord-shapes for the major chords: There are separate fingerings for chords having

root notes on one of the four strings three–six.[19]

Shifting chords: Vertical and diagonal

The repetition of the major-thirds tuning enables notes and chords to be raised one octave by being vertically shifted by three strings.[5] Notes and chords may be shifted diagonally in major-thirds tuning, by combining a vertical shift of one string with a horizontal shift of four frets:[1][20] "Like all regular tunings, chords in the major third tuning can be moved across the fretboard (ascending or descending a major third for each string)...."[1]

In standard tuning, playing scales of one octave requires three patterns, which depend on the string of the root note.[21] Chords cannot be shifted diagonally without changing finger-patterns. Standard tuning has four finger-patterns for musical intervals,[19] four forms for basic major-chords,[22] and three forms for the inversion of the basic major-chords.[18]

Open chords and beginning players

{ \clef "treble_8" \time 6/4 < c, e, aes, c e aes c' e' aes' >1. || < c, e, aes, >2 <c,>4 <e,>4 <aes, >4 < c, e, aes, >4 || < c e aes >2 <c >4 <e >4 <aes >4 < c e aes >4 || <c' e' aes' >2 <c' >4 <e' >4 <aes' >4 < c' e' aes' >4 || <c, e, aes, c e aes c' e' aes'>1. }
Sevenths chords, constructed in closed position by stacking third intervals on the C-major scale, are played on three frets in M3 tuning.

Major-thirds tunings are unconventional

open tunings, in which the open strings form an augmented triad. In M3 tunings, the augmented fifth replaces the perfect fifth of the major triad, which is used in conventional open-tunings.[1] For example, the C-augmented triad (C, E, G♯) has a G♯ in place of the C-major triad's G. (The note G♯ is enharmonically equivalent to A♭, as noted above.) Consequently, M3 tunings are also called (open) augmented-fifth tunings (in French "La guitare #5, majeure quinte augmentée").[23]

Instructional literature uses standard tuning.

relative minor-keys (Am, Em, Bm) may prefer standard tuning over an M3 tuning.[25] In particular, hobbyists playing folk music around a campfire are well served by standard tuning. Such hobbyists may also play major-thirds tuning, which also has many open chords with notes on five or six strings;[26][27] chords with five-six strings have greater volume than chords with three-four strings and so are useful for acoustic guitars (for example, acoustic-electric guitars without amplification
).

Intermediate guitarists do not limit themselves to one hand-position, and consequently open chords are only part of their chordal repertoire. In contemporary music, master guitarists "think diagonally and move up and down the strings"; fluency on the entire fretboard is needed particularly by guitarists playing jazz.[24] According to its inventor, Ralph Patt, major-thirds tuning

makes the hard things easy and the easy things hard. ... This is never going to take the place of folk guitar, and it's not meant to. For difficult music, and for where we are going in free jazz and even the old be-bop jazz, this is a much easier way to play.[9]

Left-handed chords

Main article:
Left-handed tuning

Major-thirds tuning is closely related to

inverse intervals" in the theory of music.[29] Consequently, chord charts for minor-sixths tunings may be used for left-handed major-thirds tunings; conversely, chord charts for major-thirds tunings may be used for left-handed minor-sixths tunings.[28]

Fingering of seventh chords

In standard tuning, the closed-voicing root-bass C7 chord on frets 3–8 is difficult to play, and so an open voicing is conventional.[note 2]

Major-thirds tuning facilitates playing chords with

dominant seventh chords.[12] By definition, a dominant seventh is a four-note chord combining a major chord and a minor seventh. For example, the C7 seventh chord combines the C-major chord {C, E, G} with B♭. In standard tuning, extending the root-bass C-major chord (C, E, G) to a C7 chord (C, E, G, B♭) would span six frets (3–8);[30] such seventh chords "contain some pretty serious stretches in the left hand".[31] An illustration shows this C7 voicing (C, E, G, B♭), which would be extremely difficult to play in standard tuning,[30] besides the openly voiced C7-chord that is conventional in standard tuning:[30] This open-position C7 chord is termed a second-inversion C7 drop 2 chord (C, G, B♭, E), because the second-highest note (C) in the second-inversion C7 chord (G, B♭, C, E) is lowered by an octave.[30][32][note 2]

Disadvantages

While major thirds tuning confers the numerous advantages detailed above, it also introduces certain disadvantages, as compared to the instrument's standard tuning:

History

A guitar fretboard with line-segments connecting the successive open-string notes of standard tuning
Standard tuning's mixture of one major-third and four perfect-fourths did not meet Ralph Patt's needs for improvisation, so he invented M3 tuning.
Main articles: Ralph Patt and Kurt Szul

Major-thirds tuning was introduced in 1964 by jazz guitarist

equivalently A♭) as their highest open-notes.[4] Patt used major-thirds tuning during all of his work as a session musician after 1965 in New York.[4] Patt developed a webpage with extensive information about major-thirds tuning.[34]

See also
  • Minor-thirds tuning
  • Repetitive open-tunings approximate M3 tunings:
    • Non-Spanish classical guitars:
      • English: Its open-C tuning C–E–G–C–E–G approximates C–E–G♯–C–E–G♯
      • Russian: Its 7-string open-G tuning G–B–D–G–B–D–G approximates G–B–D♯–G–B–D♯–G
    • Other
      open tunings
      • Open A tuning
        : E–A–C♯–E–A–C♯ approximates F–A–C♯–F–A–C♯
      • Open B tuning: F♯–B–D♯–F♯–B–D♯ approximates G–B–D♯–G–B–D♯
      • Open C tuning: C–E–G–C–E–G approximates C–E–G♯–C–E–G♯
      • Open D tuning: D–F♯–A–D–F♯–A approximates D–F♯–A♯–D–F♯–A♯
      • Open E tuning: E–G♯–B–E–G♯–B approximates E–G♯–C–E–G♯–C
      • Open F tuning
        : F–A–C–F–A–C approximates F–A–C♯–F–A–C♯
      • Open G tuning: G–B–D–G–B–D approximates G–B–D♯–G–B–D♯

References

Footnotes

  1. ^ a b Classical guitars have 12 frets, while steel-string acoustics have 14 or more (Denyer 1992, p. 45). Electric guitars have more frets, for example 20 (Denyer 1992, p. 77).
  2. ^
    equal-temperament
    tuning, in which B♭ and A♯ denote the same pitch. These notes represent distinct pitches in tuning systems that are not equally tempered.

Citations

  1. ^ a b c d Sethares (2001, "The major third tuning" (pp. 56–57), p. 56)
  2. ^ a b c d e f Peterson (2002, pp. 36–37)
  3. ^ a b c d e f g Kirkeby (2012)
  4. ^ a b c d e f g Peterson (2002, p. 36)
  5. ^ a b c d Griewank (2010, p. 3)
  6. ^ a b Patt, Ralph (4 April 2004). "Tuning in all thirds". rec.music.makers.guitar.jazz. Retrieved 10 December 2012.
  7. ^ a b Griewank (2010, p. 1)
  8. ^ a b c d e Griewank (2010, p. 4)
  9. ^ a b c d Peterson (2002, p. 37)
  10. ^ Kirkeby (2012, "Strings")
  11. ^ a b c Griewank (2010, p. 9)
  12. ^ a b c Griewank (2010, p. 2)
  13. ^ a b c Sethares (2001, p. 52)
  14. ^ a b Denyer (1992, p. 72)
  15. ^ Mead (2002, pp. 28 and 81)
  16. ^ Duckworth (2007, p. 339)
  17. ^ Griewank (2010, p. 10)
  18. ^ a b Denyer (1992, p. 121)
  19. ^ a b Denyer (1992, p. 119)
  20. ^ Griewank (2010, pp. 9–10)
  21. ^ Denyer (1992, p. 105)
  22. ^ Denyer (1992, pp. 74–75)
  23. ^ Zemb, Patrick (15 August 2007). "Sommaire du site musical (French: Summary of the musical site)". English machine-translation. Archived from the original on 24 June 2013. Retrieved 29 August 2012.
  24. ^ a b White (2005)
  25. ^ Griewank (2010, p. 5)
  26. ^ Griewank (2010, pp. 13, with listing on pp. 20–21)
  27. ^ Sethares (2001, "The major third tuning" (pp. 56–57), listing on p. 57)
  28. ^ a b Sethares (2001, p. 53)
  29. ^ Duckworth (2007, pp. 128–129)
  30. ^ a b c d Smith (1980, pp. 92–93)
  31. ^ Kolb (2005, p. 37)
  32. ^ Fisher (2002, pp. 30–33)
  33. ^ Patt (2008)
  34. ^ Sethares (2012)

Bibliography

Further reading

External links

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