Music Guide #2 – The Key Of A Major

Chords In The Key Of A Major

Take a look at the basic chords in the key of A. We will learn the basic three note chords (triads), as well as four note extended chords.

Before listing the various chords, let’s take a look at the A major scale. The notes in this scale are A B C# D E F# G#. Each of these notes is the root note of a chord in the key of A. The chords follow the pattern, Major Minor Minor Major Major Minor Diminished.

The triad chords in this key are A major, B minor, C# minor, D major, E major, F# minor, and G# diminished. The four note chords are A major seventh, B minor seventh, C# minor seventh, D major seventh, E dominant seventh, F# minor seventh, and G# minor seventh flat five.

Numerals are used to represent each chord. For the major chords, the numerals are capitalized, while the minor and diminished chords are all in lower case.

  • 1 – A major, A major seventh (Amaj, Amaj7)
  • 2 – B minor, B minor seventh (Bm, Bm7)
  • 3 – C sharp minor, C# minor seventh (C#m, C#m7)
  • 4 – D major, D major seventh (D, Dmaj 7)
  • 5 – E major, E dominant seventh (E, E7)
  • 6 – F sharp minor, F# minor seventh (F#m, F#m7)
  • 7 – G# diminished, G# minor seventh flat five (G#°, G#m7b5)

Piano Chords In The Key Of A Major

A major

A major (or the key of A) is a major scale based on A, with the pitches A, B, C♯, D, E, F♯, and G♯. Its key signature has three sharps. Its relative minor is F-sharp minor and its parallel minor is A minor. The key of A major is the only key where a Neapolitan sixth chord on 2 requires both a flat and a natural accidental.

Relative key: F-sharp minor

Parallel key: A minor

Dominant key: E major

Subdominant: D major

Component pitches

A, B, C♯, D, E, F♯, G♯

F-sharp minor

F-sharp minor is a minor scale based on F♯, consisting of the pitches F♯, G♯, A, B, C♯, D, and E. Its key signature has three sharps. Its relative major is A major and its parallel major is F-sharp major (or enharmonically G-flat major).

Relative key: A major

Parallel key: F-sharp major enharmonic: G-flat major

Dominant key: C-sharp minor

Subdominant: B minor

Component pitches

F♯, G♯, A, B, C♯, D, E


_ _