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How to Read Guitar Chord Diagrams
Learn how to read guitar chord diagrams quickly. Understand dots, numbers, Xs, Os, and finger positions so you can play any chord chart at sight.
Amaj(add9)/C♯ guitar shapes
Popular fretboard positions with fingering suggestions
Showing 8 of 102 playable shapes
About the chord
A major add 9 / C♯ (1st inversion)
The A major add 9 major add 9 chord extends the major triad with an added ninth B, creating a bright, expansive harmony. Unlike the major 9 chord, it lacks the major seventh, offering a fresher, more open sound often used in pop, rock, and jazz for uplifting atmospheres. With C♯ in the bass, this voicing functions as the 1st inversion of A major add 9.
Root note: A
Bass note: C♯
Chord tones: 4
Playable shapes: 102
Chord tones
AC♯EB
Notes & Intervals
Each note below shows how the chord is built from its root. This is the theory layer underneath the fretboard shapes.
A Unison (Root) 1
The root anchors the chord and defines its tonal center.
C♯ Major Third 3
This note defines the chord's major quality and brings brightness to the sound.
E Perfect Fifth 5
The fifth reinforces stability and gives the chord its strong harmonic frame.
B Major Ninth 9
The ninth opens the chord up and adds a modern, spacious color.
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