A Dominant 7th
A7 is made of 4 notes: A, C#, E and G. Here it is in root position, with A at the bottom.
Inside Notley Piano: all the inversions of A7, fingering for both hands, a play button, and practice that helps you remember it.
| Note | Degree | Interval from A |
|---|---|---|
| A | 1 | root |
| C# | 3 | major 3rd |
| E | 5 | perfect 5th |
| G | b7 | minor 7th |
A dominant 7th chord adds a minor 7th on top of a major chord. It sounds bluesy and restless, and it pulls strongly back to the chord a 5th below. It is the backbone of the 12-bar blues.