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Dominant Seventh Chord

Definition

A dominant seventh chord is a four-note chord consisting of the dominant triad (built on the fifth scale degree) with an added minor seventh interval. It creates tension and has a strong tendency to resolve to the tonic chord.

Analogy

Picture a superhero about to save the day in a movie. The dominant seventh chord represents that moment of suspense just before the hero swoops in, adding excitement and anticipation for their triumphant arrival.

Related terms

Secondary Dominant: A secondary dominant is a dominant chord built on a scale degree other than the fifth, often used to create temporary key changes or add harmonic interest.

Altered Dominant Chord: An altered dominant chord involves modifying one or more notes of the basic dominant seventh chord, typically by raising or lowering certain intervals.

Dominant Function: Dominant function refers to how the dominant chords play a crucial role in establishing tonality and creating tension that resolves back to the tonic.