A 11th chords Author: Juan Martinez Categories: A Chords Tags: 11 chords A11 chord on a piano Formula: 1-3-5-♭7-9-11 Notes: A-C#-E-G-B-D chord suffix: A11 Use these charts to create your own A11 chord or play a A11 melody. A11 chord on a pianoA 11th chord on a guitar