Skip to content

Chord type

Dominant 9th ♭5 Chords on Piano

The dominant 9th ♭5 chord combines a flattened fifth with the ninth extension over a dominant 7th foundation. The ♭5 creates a tritone substitute quality while the 9th adds jazz sophistication. It appears in bebop and post-bop as a reharmonization tool and works anywhere a tritone substitution or Lydian Dominant color is desired.

Each key below opens the full reference entry — keyboard diagram, audio, inversions, fingerings, and notation.

Formula: Root – Major 3rd – Diminished 5th – Minor 7th – Major 9th

Scale degrees: 1–3–♭5–♭7–9

Sound: Sophisticated, tritone-sub, angular, bebop

Symbol: 9♭5 (C9♭5)

Browse by key

All 18 spellings, ♯ and ♭ keys listed separately.

Dominant 9th ♭5 Chord in All 18 Keys

C Dominant 9th ♭5 ChordNotes: C – E – G♭ – B♭ – D

C♯ Dominant 9th ♭5 ChordNotes: C♯ – E♯ – G – B – D♯

D♭ Dominant 9th ♭5 ChordNotes: D♭ – F – A♭♭ – C♭ – E♭

D Dominant 9th ♭5 ChordNotes: D – F♯ – A♭ – C – E

D♯ Dominant 9th ♭5 ChordNotes: D♯ – F♯♯ – A – C♯ – E♯

E♭ Dominant 9th ♭5 ChordNotes: E♭ – G – B♭♭ – D♭ – F

E Dominant 9th ♭5 ChordNotes: E – G♯ – B♭ – D – F♯

F Dominant 9th ♭5 ChordNotes: F – A – C♭ – E♭ – G

F♯ Dominant 9th ♭5 ChordNotes: F♯ – A♯ – C – E – G♯

G♭ Dominant 9th ♭5 ChordNotes: G♭ – B♭ – D♭♭ – F♭ – A♭

G Dominant 9th ♭5 ChordNotes: G – B – D♭ – F – A

G♯ Dominant 9th ♭5 ChordNotes: G♯ – B♯ – D – F♯ – A♯

A♭ Dominant 9th ♭5 ChordNotes: A♭ – C – E♭♭ – G♭ – B♭

A Dominant 9th ♭5 ChordNotes: A – C♯ – E♭ – G – B

A♯ Dominant 9th ♭5 ChordNotes: A♯ – C♯♯ – E – G♯ – B♯

B♭ Dominant 9th ♭5 ChordNotes: B♭ – D – F♭ – A♭ – C

B Dominant 9th ♭5 ChordNotes: B – D♯ – F – A – C♯

C♭ Dominant 9th ♭5 ChordNotes: C♭ – E♭ – G♭♭ – B♭♭ – D♭