Cbmaj13 chord
The C-flat major thirteenth chord (abbreviated "Cbmaj13 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 major eleventh chord.
In practice, the fifth (G♭) and eleventh (F♭) are often omitted from the Cbmaj13 chord to avoid a very dissonant sound, and because it's not always possible to play all notes simultaneously.
Name
C-flat major thirteenth chord
Notes
C♭ E♭ G♭ B♭ D♭ F♭ A♭
Intervals
1 3 5 7 9 11 13
Chord symbol
C♭maj13
Alternative symbols
C♭▵13 C♭ma13 C♭MA13 C♭M13
Type
Heptad (seven-note chord)