Jazz Seventh Chords

A seventh chord consists of a triad plus the seventh interval above the root. When not
otherwise specified, a seventh chord is usually a major triad with an added minor seventh.

Chord Name	Construction
Dominant Seventh	Dominant degree of the major, harmonic & melodic minor scales.
Major Seventh	The triad and the seventh are major.
Minor Seventh	The triad and the seventh are minor.
Diminished Seventh	The triad and the seventh are diminished.
Half Diminished Seventh	The triad is diminished, but the seventh is minor.

The name given to major, minor & diminished seventh chords is
determined by type of triad & seventh interval which they are built.

Chord Name	Scale & Degree Where Found
Chord Name	Major	Natural Minor	Harmonic Minor	Melodic Minor
Dominant Seventh	V	VII	V	IV, V
Major Seventh	I, IV	III, VI	VI
Minor Seventh	II, III, VI	I, IV, V	IV	II
Diminished Seventh			VII
Half Diminished Seventh	VII	II	II	VI, VII