The A dominant ninth chord is a vibrant and harmonically rich chord that extends the traditional dominant seventh by adding a ninth, creating a sound that is both colorful and full of tension. Its notes, A, C♯, E, G, and B, combine to produce a chord that is ideal for jazz, blues, and funk, where expressive and dynamic harmonic movement is essential. The inclusion of the ninth adds a layer of complexity and sophistication, making progressions feel more fluid and emotionally engaging. The A dominant ninth chord serves as a powerful tool for musicians seeking to enhance their compositions with depth, color, and a sense of forward motion.
Name: A dominant ninth chord
Notes: A, C♯, E, G, B
Intervals: 1, 3, 5, ♭7, 9
Chord symbol: A9
Type: Pentad (five-note chord)
A dominant ninth chord on the Staff
A dominant ninth chord on Piano
A dominant ninth chord on Guitar
A 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.