The B major sixth-ninth chord, often abbreviated as B6/9, is a five-note chord that adds depth and richness to the traditional B major triad. Comprising the notes B (root), D♯ (major third), F♯ (perfect fifth), G♯ (major sixth), and C♯ (major ninth), this chord introduces both the sixth and ninth degrees of the B major scale to the basic triad. The addition of these intervals imparts a warm, jazzy flavor to the chord, making it a popular choice in genres such as jazz, soul, and pop. The B major sixth-ninth chord is constructed by stacking the root, major third, perfect fifth, major sixth, and major ninth intervals, creating a harmonious blend that enhances chord progressions. Its distinctive sound is achieved by incorporating the sixth and ninth degrees, which are not present in the standard major chord, thereby enriching the harmonic palette. This chord is versatile and can be used in various musical contexts to add complexity and emotional depth to compositions. Its unique tonal quality makes it a valuable addition to a musician’s chord repertoire, offering a fresh alternative to conventional major chords.
Name: B major sixth-ninth chord
Notes: B, D♯, F♯, G♯, C♯
Intervals: 1, 3, 5, 6, 9
Chord symbol: B45906
Alternative symbols: B6add9, B6(add9)
Type: Pentad (five-note chord)
B major sixth-ninth chord on the Staff
B major sixth-ninth chord on Piano
B major sixth-ninth chord on Guitar
B major sixth-ninth chord on Ukulele
Rowan Ellis is a musician and educator with a passion for exploring the language of harmony and melody. With years of experience across classical, jazz, and contemporary styles, Rowan breaks down music theory into clear, practical insights. His goal is to make chords and scales less intimidating and more inspiring for every musician.