Seventh Chord Construction | Dominant Seventh Chords (3 of 5)
A Dominant seventh chord is unique in that it consists of the notes of a Major triad but with the addition of an interval of a minor seventh above the root note. This combination of a Major triad and minor seventh interval is what gives the Dominant seventh chord its defining sound.
To get a better idea, let's put together a Dominant seventh chord above the root note C.
The notes of a C Major triad are C, E and G,