Cb7(b9) chord
The C-flat dominant minor ninth chord (abbreviated "Cb7(b9) chord") is a five-note chord consisting of the notes C♭, E♭, G♭, B♭♭, and D♭♭. The chord is formed by adding a major ninth to a C-flat dominant seventh chord.
In practice, the fifth (G♭) is often omitted from the Cb7(b9) chord because it's not always possible to play all notes simultaneously.
Name
C-flat dominant minor ninth chord
Notes
C♭ E♭ G♭ B♭♭ D♭♭
Intervals
1 3 5 ♭7 ♭9
Chord symbol
C♭7(b9)
Alternative symbol
C♭7b9
Type
pentad (five-note chord)