Cbm13 chord
The C-flat minor thirteenth chord (abbreviated "Cbm13 chord") is a seven-note chord consisting of the notes C♭, E♭♭, G♭, B♭♭, D♭, F♭, and A♭. The chord is formed by adding a thirteenth to a C-flat minor eleventh chord.
In practice, the fifth (G♭) and eleventh (F♭) are often omitted from the Cbm13 chord to avoid a very dissonant sound, and because it's not always possible to play all notes simultaneously.
Name
C-flat minor thirteenth chord
Notes
C♭ E♭♭ G♭ B♭♭ D♭ F♭ A♭
Intervals
1 ♭3 5 ♭7 9 11 13
Chord symbol
C♭m13
Alternative symbols
C♭–13 C♭mi13 C♭min13
Type
Heptad (seven-note chord)