This is an exceptionally deep and resonant tuning for a Guitar, venturing significantly into baritone territory with its lowest note, A1. The open strings immediately present a rich and complex A Major 13th chord, creating a vast, open soundscape perfect for ambient textures, progressive rock, jazz fusion, or expansive fingerstyle compositions. The deeply rooted bass foundation provides a powerful sonic bed for exploration, while the unique intervals in the higher register encourage innovative melodic and harmonic approaches, allowing for drones and shimmering arpeggios.

Technical Analysis:

The tuning consists of the notes A1, E2, B2, E3, F4#, and G4#, from the lowest (String 6) to the highest (String 1) string. The intervals between the open strings are:

• String 6 (A1) to String 5 (E2): A Perfect Fifth (7 semitones)
• String 5 (E2) to String 4 (B2): A Perfect Fifth (7 semitones)
• String 4 (B2) to String 3 (E3): A Perfect Fourth (5 semitones)
• String 3 (E3) to String 2 (F4#): A compound interval of 14 semitones (a Major Ninth + an Octave). This is a very wide interval, creating a significant tonal jump and contributing to the tuning's unique character.
• String 2 (F4#) to String 1 (G4#): A Major Second (2 semitones)

The combined open strings distinctly form an A Major 13th chord (Root: A, Fifth: E, Ninth: B, Fifth: E (octave higher), Thirteenth: F#, Major Seventh: G#). This inherent harmony makes the tuning particularly suitable for open string work and allows for rich voicings with minimal fretting. While the open strings sound complete, easy chords in this tuning can also include various forms of A Major, A Major 7th, E Major, and B Minor/Major shapes, especially when leveraging the resonant lower strings as a drone.

How to Tune:

• String 6 (to A1): Tune down 7 semitones. This is a significant drop from standard E2. A heavier gauge string is strongly advised to maintain proper tension and tone.
• String 5 (to E2): Tune down 5 semitones. This is a significant drop from standard A2. A heavier gauge string is strongly advised.
• String 4 (to B2): Tune down 3 semitones. This is a moderate drop from standard D3.
• String 3 (to E3): Tune down 3 semitones. This is a moderate drop from standard G3.
• String 2 (to F4#): Tune down 5 semitones. To reach F4# with this downward movement, the original string would need to be tuned exceptionally high (e.g., C5 or C#5). A heavier gauge string is strongly advised due to the substantial tension implied for the starting point of this string, or the significant drop if the starting point is indeed very high. Ensure your string can handle the initial high tension or consider a dedicated baritone string set.
• String 1 (to G4#): Tune down 8 semitones. To reach G4# with this downward movement, the original string would need to be tuned exceptionally high (e.g., D5 or D#5). A heavier gauge string is strongly advised due to the substantial tension implied for the starting point of this string, or the significant drop if the starting point is indeed very high. Ensure your string can handle the initial high tension or consider a dedicated baritone string set.