Repetitive tuning

A repetitive tuning begins with a list of notes that is duplicated, either at unison or at higher octaves.

For example, in major-thirds tuning, chords are raised an octave by shifting fingers by three strings on the same frets.

[2] Repetitive tunings are listed after their number of open pitches.

For example, the repetitive open-C tuning C-E-G-C-E-G has three open-pitches, each of which is associated with repeated notes {(C,C), (E,E), (G,G)}.

It is also a regular tuning in which the interval between its strings is a tritone (augmented fourth).

This kind of tuning can also be called modal D or open D5 as it contains a D chord without a third.

[1][2] In each minor-thirds tuning, every interval between successive strings is a minor third.

[14] In the minor-thirds tuning beginning with C, the open strings contain the notes (c, d♯, f♯) of the diminished C chord.

Major-thirds tuning repeats itself (at a higher octave) after three strings. Thus, chords can be shifted vertically on the same frets.
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 the same fret in major-thirds tuning. [ 1 ]
Every augmented-fourths (tritone) tunings repeats its two notes three times.
Every major-thirds tuning repeats its three notes twice.
For the Russian guitar, the open strings form a G-major chord, which is twice repeated
Minor-thirds tunings repeat its four notes after four strings (twice on an eight-string guitar ).