The B dominant ninth chord, often notated as B9, is a five-note chord that extends the traditional B dominant seventh by adding the ninth interval, creating a richer and more complex harmonic sound. Its notes are B (root), D♯ (major third), F♯ (perfect fifth), A (minor seventh), and C♯ (major ninth), which together provide both tension and color that enhance chord progressions. This chord is widely used in jazz, blues, and funk, as it adds melodic interest while maintaining a strong dominant function that naturally resolves to the tonic. The combination of the minor seventh and major ninth above the root produces a vibrant and expressive texture, making the B dominant ninth chord an essential tool for musicians seeking to enrich harmonic movement and add emotional depth to their compositions.
Name: B dominant ninth chord
Notes: B, D♯, F♯, A, C♯
Intervals: 1, 3, 5, ♭7, 9
Chord symbol: B9
Type: Pentad (five-note chord)
B dominant ninth chord on the Staff
B dominant ninth chord on Piano
B dominant ninth chord on Guitar
B dominant 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.