Chord · Piano
B 7 Flat 9 Chord · Piano
Interactive keyboard
Highlighted notes form this chord.
Notes
B · D♯ · F♯ · A · C
Root: B
Intervals
1 · 3 · 5 · ♭7 · ♭9
How it is built
This chord starts on B and applies the intervals 1, 3, 5, ♭7, ♭9. The result contains 5 distinct pitch classes per octave.
Explore related combinations
Guide and musical context
About B 7 Flat 9 Piano Chord
B 7 Flat 9 Piano chord contains B, D♯, F♯, A, C. Its sound is highly tense, with an expressive semitone between root and flat ninth.
Character and sound
Highly tense, with an expressive semitone between root and flat ninth.
Musical context and history
The flat-nine dominant is especially important in minor keys and in jazz, flamenco and chromatic harmony. The flat ninth intensifies the need to resolve.
How and where it is used
It is common on V in minor and on altered secondary dominants.
On piano, the notes can be distributed between both hands and across different octaves. The interactive keyboard makes it easy to verify pitches and experiment with inversions or registers without changing the harmony. Everything you see and hear on this page comes from the same note set shown above.
Harmonic and musical relationships
As a dominant sonority on B, a common functional resolution moves toward E. Alterations and extensions change the color while preserving that tension-and-resolution reference.
The formula on this page is 1 · 3 · 5 · ♭7 · ♭9 and, from B, produces the notes B · D♯ · F♯ · A · C.
Frequently asked questions
What notes are in the B 7 Flat 9 Piano chord?
The notes are B, D♯, F♯, A, C.
What is its interval formula?
The formula is 1 · 3 · 5 · ♭7 · ♭9.
How does it sound and what is it used for?
Highly tense, with an expressive semitone between root and flat ninth. It is common on V in minor and on altered secondary dominants.
How can I check it on Piano?
Use the interactive diagram on this page and press Play or Note by note. The highlighted positions, written notes and playback all use the same pitch collection.