The B-flat dominant seventh sharp ninth chord (B♭7♯9) is a five-note chord comprising the notes B♭, D, F, A♭, and C♯. It is constructed by adding a sharp ninth (C♯) to the B♭ dominant seventh chord, resulting in a chord that blends the stability of the major triad with the added tension of the seventh and the dissonant sharp ninth. This chord is commonly used in various musical genres, including jazz, blues, and rock, to create a sense of tension that resolves to the tonic chord. The B-flat dominant seventh sharp ninth chord is often employed as a dominant function, providing a strong harmonic pull towards the tonic chord and adding a sense of anticipation and resolution to chord progressions. Its versatility and rich tonal quality make it a valuable addition to a musician’s harmonic vocabulary. Notably, this chord is sometimes referred to as the “Hendrix chord,” named after Jimi Hendrix, who popularized its use in rock music. Its distinctive sound has become a hallmark of many classic rock and blues compositions.
Name: B-flat dominant seventh sharp ninth chord
Symnonyms:: B-flat dominant sharp ninth chord
Notes: B♭, D, F, A♭, C♯
Intervals: 1, 3, 5, ♭7, ♯9
Chord symbol: B♭7(♯9)
Alternative symbols: B♭7♯9
Type: Pentad (five-note chord)
B-flat dominant seventh sharp ninth chord on the Staff
B-flat dominant seventh sharp ninth chord on Piano
B-flat dominant seventh sharp ninth chord on Guitar
B-flat 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.