Fbm13 chord
The F-flat minor thirteenth chord (abbreviated "Fbm13 chord") is a seven-note chord consisting of the notes F♭, A♭♭, C♭, E♭♭, G♭, B♭♭, and D♭. The chord is formed by adding a thirteenth to a F-flat minor eleventh chord.
In practice, the fifth (C♭) and eleventh (B♭♭) are often omitted from the Fbm13 chord to avoid a very dissonant sound, and because it's not always possible to play all notes simultaneously.
Name
F-flat minor thirteenth chord
Notes
F♭ A♭♭ C♭ E♭♭ G♭ B♭♭ D♭
Intervals
1 ♭3 5 ♭7 9 11 13
Chord symbol
F♭m13
Alternative symbols
F♭–13 F♭mi13 F♭min13
Type
Heptad (seven-note chord)