Cbm11 chord
The C-flat minor eleventh chord (abbreviated "Cbm11 chord") is a six-note chord consisting of the notes C♭, E♭♭, G♭, B♭♭, D♭, and F♭. The chord is formed by adding an eleventh to a C-flat minor ninth chord.
In practice, the fifth (G♭) is often omitted from the Cbm11 chord to avoid a very dissonant sound, and because it's not always possible to play all notes simultaneously.
Name
C-flat minor eleventh chord
Notes
C♭ E♭♭ G♭ B♭♭ D♭ F♭
Intervals
1 ♭3 5 ♭7 9 11
Chord symbol
C♭m11
Alternative symbols
C♭–11 C♭mi11 C♭min11
Type
hexad (six-note chord)