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In the standard guitar-tuning, one major-third interval is interjected amid four perfect-fourth intervals. Standard tuning (listen) Among alternative tunings for guitar, each augmented-fourths tuning is a regular tuning in which the musical intervals between successive open-string notes are each augmented fourths. [1]
With augmented-fourths tunings, the fretboard has greatest symmetry. [22] In fact, every augmented-fourths tuning lists the notes of all the other augmented-fourths tunings on the frets of its fretboard. Professor Sethares wrote that "The augmented-fourth interval is the only interval whose inverse is the same as itself.
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 ...
Augmented fourths : New standard (7, 3) All fifths : Minor sixths : Guitar tunings: Among alternative tunings for the guitar, all-fourths tuning is a regular tuning. [1]
Major-thirds tuning is a regular tuning in which the musical intervals between successive strings are each major thirds. [29] [30] [31] Unlike all-fourths and all-fifths tuning, major-thirds tuning repeats its octave after three strings, which again simplifies the learning of chords and improvisation. [32]
In most other tuning systems, they are not equivalent, and neither is exactly equal to half an octave. Any augmented fourth can be decomposed into three whole tones. For instance, the interval F–B is an augmented fourth and can be decomposed into the three adjacent whole tones F–G, G–A, and A–B.
Guitar chords are dramatically simplified by the class of alternative tunings called regular tunings. In each regular tuning, the musical intervals are the same for each pair of consecutive strings. Regular tunings include major-thirds (M3), all-fourths, augmented-fourths, and all-fifths tunings. For each regular tuning, chord patterns may be ...
Augmented-fourths tuning, for example, B-F-b-f-b'-f'. Any note fingered on one string can be fingered on two other strings. Thus chords can be fingered in many ways in augmented-fourths tuning. It is also a regular tuning in which the interval between its strings is a tritone (augmented fourth). [4] A cittern tuning, such as C-G-c-g-c'-g'. [5]