Augmented-fourths tuning

The standard guitar-tuning interjects exactly one major third amid four perfect fourths for the intervals between its successive open strings.

The set of augmented-fourths tunings has three properties that simplify learning by beginners and improvisation by experts: Regular intervals, string repetition, and lefty-righty symmetry.

The set of augmented-fourths tunings has three properties that simplify learning by beginners and improvisation by experts: Regular intervals, string repetition, and lefty-righty symmetry.

[4] In contrast, augmented fourths is a repetitive tuning that begins the next octave after two strings.

[5] These tunings' repetition of open-string notes again simplifies the learning of chords and improvisation.

There are no sharps or flats in the open strings of exactly one augmented-fourths tuning, that with only B and F notes (B-F-b-f-b'-f').

[9] This tuning was used in "Tri 7/5" by Shawn Lane (The Tri-Tone Fascination and Powers of Ten; Live!).

A guitar fretboard with line-segments connecting the successive open-string notes of the standard tuning
In the standard guitar-tuning, one major-third interval is interjected amid four perfect-fourth intervals.
Standard tuning (listen)
In modern music, the twelve notes of the octave are equally space around the chromatic circle . On this circle, there are six pairs of antipodal notes, each representing an augmented-fourth interval. Each such pair specifies the successive open-strings of an augmented-fourths tuning.