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Cmaj7(add13)/B is the C major 7th add 13 / B (3rd inversion) guitar chord with B in the bass. It uses the notes C, E, G, B, and A and the interval formula 1-3-5-7-13.
The C major 7th add 13 major 7th add 13 chord blends the major 7th with a 13th A, creating a lush, expansive sound. The major seventh B and 13th A produce a warm, jazzy color, perfect for sophisticated jazz and fusion compositions. With B in the bass, this voicing functions as the 3rd inversion of C major 7th add 13.
Also written as Cmaj7(add13), CM7add13/B, and CM7(add13)/B.
These are quick-start shapes for players who want the answer first and the deeper theory second.
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Each note below shows how the chord is built from its root. This is the theory layer underneath the fretboard shapes.
The root anchors the chord and defines its tonal center.
This note defines the chord's major quality and brings brightness to the sound.
The fifth reinforces stability and gives the chord its strong harmonic frame.
The major seventh adds a smooth, lush tension close to the root.
The thirteenth adds richness and a polished extended-chord color.
Every shape is shown with its diagram and exact fingering instructions.
Cmaj7(add13)/B uses the notes C, E, G, B, and A. Its interval formula is 1-3-5-7-13.
Cmaj7(add13)/B is also written as Cmaj7(add13), CM7add13/B, and CM7(add13)/B.
Place the 1st finger on the 1st fret of the 2nd string. Place the 2nd finger on the 2nd fret of the 3rd string, 4th string, and 5th string in barre position. Let the first string ring open. Strum from the 5th string down.
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