A+
Triads · A root
A+
An ambiguous, dreamlike triad built from two stacked major thirds.
0 st4 st8 st
Notes in A+
ARoot
C#3rd
F5th
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 A+, Am, A7, or another quality — the hardest and most useful ear training skill.
Augmented in All 12 Keys
Other Chords in A
Related Triads
About the A+ Chord
The A+ chord is a augmented chord built on A. It contains the notes A, C#, F — the root, third, and fifth.
An ambiguous, dreamlike triad built from two stacked major thirds. Practising the A+ 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.