The term ‘minor’ refers to the b3rd. This is a C minor chord with a dominant or b7th. If we were to raise the 7th, we would have a C minor chord with a major 7th. Now check Example 5!

All the chords built on other notes in the scale of C are minor, except chord VII - the notes B – D – F, which is diminished. When a seventh is added to a chord this is known as a seventh chord.

Harmonic minor keys are used when writing ... In the jazz styles of Gershwin and Kern, the dominant seventh was often substituted with an augmented chord.This gave the tonic-dominant a new and ...