Major-minor 7th chord (Mm or dominant-7th)

Definition

A major-minor 7th chord, also known as the dominant-7th chord, combines a major triad with a minor seventh interval. It creates tension that resolves to the tonic in most musical contexts.

Analogy

Think of being on an exciting roller coaster ride where you experience both thrilling highs and heart-pounding drops. The major-minor 7th chord is like that exhilarating feeling of anticipation before reaching the top of each drop.

Related terms

Major 9th chord: A major ninth chord adds another note to the basic structure of the dominant-7th by including an additional major ninth above the root note.

Half-diminished 7th chord: Also known as minor-major seven flat five, it is a chord that combines a diminished triad with a minor seventh interval. It has a mysterious and tense sound.

Altered dominant chord: An altered dominant chord is a dominant 7th chord with one or more notes altered by raising or lowering them. It adds tension and color to the harmony.