Fb9 chord
The F-flat dominant ninth chord (abbreviated "Fb9 chord") is a five-note chord consisting of the notes F♭, A♭, C♭, E♭♭, and G♭. The chord is formed by adding a major ninth to a F-flat dominant seventh chord.
In practice, the fifth (C♭) is sometimes omitted from the Fb9 chord because it's not always possible to play all notes simultaneously.
Name
F-flat dominant ninth chord
Notes
F♭ A♭ C♭ E♭♭ G♭
Intervals
1 3 5 ♭7 9
Chord symbol
F♭9
Type
Pentad (five-note chord)