Guitar Chord Abmaj7#11: Structure, Notes and Theory

Abmaj7#11 — a chord built on the note “Ab” with a smooth, “creamy” tone and a touch of jazz charm. A traditional choice for jazz and soul, especially effective in gentle dynamics. Brings warmth and fluidity to the harmony. The chord includes alterations: #11 — a spicy tone that requires careful spacing from the third for a clean sound.

Formula and Structure of the Abmaj7#11 Chord

Interval formula from the root note: 1 — 3 — 5 — 7 — #11. The chord consists of the following notes:

• Ab — unison and the main tonal anchor.
• C — major third with a bright major quality and clear stability above the tonic.
• Eb — perfect fifth, stabilizing the triad and adding tonal grounding.
• G — major seventh with a smooth jazz sparkle and slight tension toward the octave.
• D — sharp eleventh with a bright jazz spice, best placed above the third.

Together, these notes form the harmonic foundation of the Abmaj7#11 chord, defining its sound and role in the musical context.

Alternative Names for the Abmaj7#11 Chord

This chord may appear under different names:

• AbΔ7#11
• AbΔ#11

All variants refer to the same harmonic structure.

Using the Abmaj7#11 Chord

Keep the 7 in the top voice to highlight its jazz smoothness. Add the 9 or 13 for extension, but avoid the clash of the 3 and 11. Use in slow tempos where the chord can “ring out.” Simplify the bass if needed to maintain clarity.

Conclusion

Abmaj7#11 is an expressive and versatile chord. Learn several fingerings, experiment with different positions and voice spacing, then try weaving it into your own playing — this will help you quickly find your unique tone.