The number of ways chords can go together to produce new and interesting sounds is nearly infinite. Musicians use their intuition and experience to arrange chords in ways that move the music along. This notion of movement is important to understanding how to compose and improvise a piece of music. Chord progressions are what gives a piece of music its harmonic movement. Harmonic Movement Usually the interplay between chords in a piece of music creates the feeling of movement and change. Some chord combinations sound uplifting, others sound somber, and some sound like ocean waves. While these harmonies and how we interpret them are nearly endless, there is a very simple principle at work. Most pieces of music tend to first establish a feeling of stability, depart from it, create tension, then return to the feeling of stability. Though some pieces of music demonstrate this more dramatically than others, as you train your ear you will become increasingly aware of it. Prog...