Sixth chord - guitar
The sixth chord (notated 6) is formed by a major triad with an added major sixth. It produces a stable sound and can substitute the maj7 chord at the end of progressions.
Intervals
| Degree | I | III | V | VI |
|---|---|---|---|---|
| Interval | Root | Major third | Perfect fifth | Major sixth |
| Semitones | 0 | 4 | 7 | 9 |
Formula 1 - 3 - 5 - 6
Theory
The sixth chord adds a major sixth (9 semitones) to the major triad. C6 = C-E-G-A, F6 = F-A-C-D. It avoids the semitone tension between the major seventh and root (present in maj7), creating a more open sound. The fifth can be omitted for a lighter voicing.
Examples
Example: Do Sixth
Open position
Bass fret 3
Bass fret 8
Styles
6th chord construction
Formula 1 - 3 - 5 - 6: major triad + major sixth (9 semitones). Example C6: C - E - G - A. Vintage jazz, swing, bossa nova sound.
Learning
Compare I6 vs Imaj7. Vintage jazz progressions. Bossa nova (I6-IIm7-V7). Elegant endings.
How to play
Imaj7 substitute (less tense). Vintage jazz: chord endings (final I6). Bossa nova signature. Major second interval between fifth and sixth.