Jazz harmonic progression
Also known as Coltrane Matrix · Coltrane cycle · chromatic third relations · multi-tonic changes
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Coltrane changes are a harmonic progression variation using substitute chords over common jazz chord progressions. These substitution patterns were first demonstrated by jazz musician John Coltrane on the albums Bags & Trane and Cannonball Adderley Quintet in Chicago. Coltrane continued his explorations on the 1960 album Giant Steps and expanded on the substitution cycle in his compositions "Giant Steps" and "Countdown", the latter of which is a reharmonized version of Eddie Vinson's "Tune Up". The Coltrane changes are a standard advanced harmonic substitution used in jazz improvisation.