Gb7(#9) chord
The G-flat dominant seventh sharp ninth chord (abbreviated "Gb7(#9) chord") is a five-note chord consisting of the notes G♭, B♭, D♭, F♭, and A. The chord is formed by adding an augmented ninth to a G-flat dominant seventh chord.
In practice, the fifth (D♭) is often omitted from the Gb7(#9) chord because it's not always possible to play all notes simultaneously.
Name
G-flat dominant seventh sharp ninth chord
Synonym
G-flat dominant sharp ninth chord
Notes
G♭ B♭ D♭ F♭ A
Intervals
1 3 5 ♭7 ♯9
Chord symbol
G♭7(#9)
Alternative symbol
G♭7#9
Type
pentad (five-note chord)