Gb minor 13th chord
Gbm13 chord for piano with keyboard diagram.
Explanation: The G flat minor thirteenth is a seven-note chord. For practical reasons the chord is normally played with omitted notes and/or inverted. The chord is often abbreviated as Gbm13 (alternatively Gbmin13).
Omissions: Gbm13(no11): Gb - A - Db - E - Ab - Eb.
Theory: The Gb minor thirteenth chord is constructed by extending the minor eleventh chord with a major thirteenth note.
Notes: Gb - A - Db - E - Ab - B - Eb / Gb - Bbb - Db - Fb - Ab - Cb - Eb