The B-Bass G6/9 Tuning, officially named "Open G 6add9" in our database, is a highly distinctive tuning for the guitar that offers a rich, extended chord voicing directly from its open strings. While its official name suggests an Open G tuning, this particular configuration presents a G6/9 chord with its major third (B) placed as the lowest note. This creates a powerful, full-bodied sound that is both harmonically interesting and surprisingly versatile.

Technically, the open strings produce the notes B2 A2 D3 G3 B3 E4. Analyzing this from a G root perspective (String 3, G3):

• The lowest string (String 6) is B2, serving as the major third of G, but in the bass, providing a unique inversion.
• String 5 is A2, which is the 9th (or 2nd) of G.
• String 4 is D3, the perfect 5th of G.
• String 3 is G3, the root.
• String 2 is B3, the major third (octave of String 6 B2).
• String 1 is E4, the major 6th (or 13th) of G.

This combination results in a beautiful G6/9 chord (G major with added 6th and 9th) with a strong B bass note. This tuning excels for rhythmic accompaniment, especially in genres like blues, folk, or even some jazz and contemporary styles where rich, open voicings are desired. Because the open strings form this extended chord, simply barring all strings at any fret will instantly yield other 6/9 chords with the 3rd in the bass. For example, barring at the first fret produces an A♭6/9 (C bass), at the second fret, an A6/9 (C# bass), and so on, making chord changes across the fretboard intuitive for this specific chord type. Players can also explore melodic lines by incorporating the open 5th and 1st strings as drones or extensions, adding to the texture. However, the extreme tension change on the 6th string should be noted, and a lighter gauge string is highly recommended for safety and optimal tone.

Here are the notes for each string:

• String 6 (Low E): B2
• String 5 (A): A2
• String 4 (D): D3
• String 3 (G): G3
• String 2 (B): B3
• String 1 (High E): E4

How to Tune:

To achieve the B-Bass G6/9 tuning from standard EADGBe, follow these adjustments:

• String 6 (Low E): Tune up 7 semitones from E to B2. Caution: Tuning up 7 semitones significantly increases string tension. It is strongly advised to use a lighter gauge string for the 6th string to prevent breakage and potential neck damage.
• String 5 (A): Keep as is; no change (0 semitones). The note remains A2.
• String 4 (D): Keep as is; no change (0 semitones). The note remains D3.
• String 3 (G): Keep as is; no change (0 semitones). The note remains G3.
• String 2 (B): Keep as is; no change (0 semitones). The note remains B3.
• String 1 (High E): Keep as is; no change (0 semitones). The note remains E4.