The D dominant seventh sharp ninth chord, often abbreviated as D7♯9, is a five-note chord that introduces a sharp ninth interval (E♯) to the standard D dominant seventh chord (D–F♯–A–C). This chord is constructed by stacking the root (D), major third (F♯), perfect fifth (A), minor seventh (C), and augmented ninth (E♯) intervals. The inclusion of the sharp ninth interval imparts a dissonant and tense quality to the chord, making it a staple in genres like blues, jazz, and rock. In the key of D, the D7♯9 chord functions as a dominant seventh chord, typically resolving to the tonic (I) chord. On the guitar, it can be played in various voicings, with one common fingering being x2123x. This chord’s distinctive sound has earned it nicknames such as the “Hendrix chord” due to its prominent use in Jimi Hendrix’s music. Its unique tonal characteristics make it a powerful tool for creating tension and adding color to chord progressions.
Name: D dominant seventh sharp ninth chord
Symnonyms:: D dominant sharp ninth chord
Notes: D, F♯, A, C, E♯
Intervals: 1, 3, 5, ♭7, ♯9
Chord symbol: D7(♯9)
Alternative symbols: D7♯9
Type: Pentad (five-note chord)
D dominant seventh sharp ninth chord on the Staff
D dominant seventh sharp ninth chord on Piano
D dominant seventh sharp ninth chord on Guitar
D dominant seventh sharp 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.