Fbm11 chord
The F-flat minor eleventh chord (abbreviated "Fbm11 chord") is a six-note chord consisting of the notes F♭, A♭♭, C♭, E♭♭, G♭, and B♭♭. The chord is formed by adding an eleventh to a F-flat minor ninth chord.
In practice, the fifth (C♭) is often omitted from the Fbm11 chord to avoid a very dissonant sound, and because it's not always possible to play all notes simultaneously.
Name
F-flat minor eleventh chord
Notes
F♭ A♭♭ C♭ E♭♭ G♭ B♭♭
Intervals
1 ♭3 5 ♭7 9 11
Chord symbol
F♭m11
Alternative symbols
F♭–11 F♭mi11 F♭min11
Type
hexad (six-note chord)