What is Chord Function?

Chord function refers to the role that a chord plays within a musical key or harmonic progression. It describes how a chord contributes to the movement, tension, and resolution of harmony within a piece of music.

In tonal music, chords are typically organized around a central key, and each chord has a specific relationship to the main tonal center. Chord functions help explain how certain chords create stability, tension, or movement toward other chords in a progression.

The three most common chord functions are tonic, dominant, and subdominant. The tonic chord represents the home or resting point of the key, the dominant chord creates tension that often resolves back to the tonic, and the subdominant chord helps move the harmony away from the tonic and toward the dominant.

Understanding chord function is important for composing, arranging, and analyzing music. Musicians and producers often use chord functions to build effective chord progressions and create a sense of musical direction within a song or composition.