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A piano reference: chords, scales, theory. Full MIDI.

B♭ 7♭9

Notes: B♭ – D – F – A♭ – C♭
Degrees: 1 – 3 – 5 – ♭7 – ♭9Also written: B♭7♭9Raise C♭ to C and it is B♭9. B♭, D, F and A♭ do not move.

The B♭ 7♭9 chord is a five-note chord made up of B♭, D, F, A♭, and C♭.

B♭ 7♭9 chord: B♭, D, F, A♭, C♭

It is built from a root, major third, perfect fifth, minor seventh, and minor ninth.

A dominant 7th with a flatted 9th: sharply dissonant, the textbook V7 resolving to a minor chord.

A♯ 7♭9
This is the same chord as A♯ 7♭9: the same keys on the keyboard, spelled with sharps.

Construction

B♭ 7♭9 = Root + Major 3rd + Perfect 5th + Minor 7th + Minor 2nd = B♭, D, F, A♭, C♭
NoteIntervalDegree
B♭Root1
DMajor 3rd3
FPerfect 5th5
A♭Minor 7th♭7
C♭Minor 2nd♭9

How to Play the B♭ 7♭9

Right Hand (RH)

Place your right hand over the keys with the thumb on the root. Use the fingering: 1 – 2 – 3 – 4 – 5

Left Hand (LH)

For the left hand, start with your pinky on the root. Use the fingering: 5 – 4 – 3 – 2 – 1

B♭ 7♭9 : Frequently Asked Questions

What is the B♭ 7♭9 chord on piano?
The B♭ 7♭9 chord contains the notes B♭ – D – F – A♭ – C♭. On piano, play these notes together to sound the chord.
What notes are in the Bb 7♭9 chord?
The Bb 7♭9 chord (Bb7♭9) contains 5 notes: Bb, D, F, Ab, B. Formula: R-M3-P5-m7-m9.
How is Bb7♭9 used in music?
Bb7♭9 is used in jazz, fusion, and contemporary music to add harmonic color. It appears as a dominant or tonic chord depending on context.
What is the scale degree formula for Bb7♭9?
Bb7♭9 uses scale degrees 1-3-5-b7-b9, giving it its distinctive sound.

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