Gb 9th chord
Gb9 chord (also called Dominant 9th chord) for piano presented by keyboard diagrams.
Explanation: The Gb ninth is a five-note chord. Due to practical circumstances, however, the fifth (Db) is often omitted and/or the chord is played inverted. The chord is often abbreviated as Gb9.
Omissions: Gb9(no3): Gb - Db - E - Ab; Gb9(no5): Gb - Bb - E - Ab.
Theory: The Gb ninth chord is constructed with a root, a major third, a perfect fifth, a minor seventh and a major ninth.
Notes: Gb - Bb - Db - E - Ab