Aadd9

Added · A root

Aadd9

A major triad with an added 9th but no 7th. Bright and open.

0 st4 st7 st14 st

Notes in Aadd9

ARoot
C#3rd
E5th
B7th

A is the reference pitch (A440). Very common in rock and pop — the vi chord in C major.

Identify the Chord Quality on A

Each chord below is played on A. Listen and identify whether you heard Aadd9, Am, A7, or another quality — the hardest and most useful ear training skill.

Add 9 in All 12 Keys

Cadd9C#add9D♭add9Dadd9D#add9E♭add9Eadd9Fadd9F#add9G♭add9Gadd9G#add9A♭add9Aadd9A#add9B♭add9Badd9

Other Chords in A

AMajorAmMinorA°DiminishedA+AugmentedAsus2Sus2Asus4Sus4Amaj7Major 7thAm7Minor 7thA7Dominant 7thAø7Half Diminished

Related Added

Aadd4Add 4

About the Aadd9 Chord

The Aadd9 chord is a add 9 chord built on A. It contains the notes A, C#, E, B — the root, third, fifth, and seventh.

A major triad with an added 9th but no 7th. Bright and open. Practising the Aadd9 chord across different voicings and contexts builds the harmonic recognition that lets you identify it instantly in any musical setting — whether in a band mix, a recording, or a live performance.