Passing chord

A passing chord is a chord that connects two primary chords in a progression, helping to bridge the harmonic gap between them. It usually appears for a brief duration and serves to create smoother transitions, add tension, or embellish the music. Passing chords can be rooted in the diatonic scale (the scale based on the key of the piece) or can be chromatic (outside the main key). They often provide more harmonic interest and can enhance the overall movement of the progression.