A 7th chord
A7 chord for piano with keyboard diagram.
Explanation: The A seventh is a dominant four-note chord. You can see the four notes of the A seventh chord marked in red color. The chord is often abbreviated as A7.
Theory: The A seventh chord is constructed with a root, a major thirdAn interval consisting of four semitones, a perfect fifthAn interval consisting of seven semitones and a minor seventhAn interval consisting of ten semitones and the 7th scale degree.
Fingerings: Little finger, middle finger, index finger, thumb (left hand); thumb, index finger, middle finger, little finger (right hand).
Notes: A - C# - E - G
A7 - inversions
Explanation: The images below show the three inversions of the A dominant seventh chord. A7/C# is an A dominant seventh with C# as the bass note, A7/E is an A dominant seventh with E as the bass note and A7/G is an A dominant seventh with G as the bass note.
See also A7 chords with alternative bass notes ›