09/02/2026
We have discussed contrafacts in Jazz Lab, learn more:
In the 1940s, bebop musicians were playing standards constantly. Songs such as “I Got Rhythm”, “How High the Moon”, “Cherokee” and “What Is This Thing Called Love?” were already familiar territory, both to musicians and audiences. But there was an important distinction in copyright law: the melody of a song could be protected, while the chord progression underneath it generally could not.
That meant a musician could take the harmony of an existing standard, write a completely new melody over the top and create a new composition. The result became known as a contrafact, and Parker, Gillespie and other bebop musicians made extensive use of the idea.
“Anthropology” was written over the chord changes to “I Got Rhythm”. “Ornithology” used the changes to “How High the Moon”. “Ko-Ko” was based on the harmony of “Cherokee”, while Tadd Dameron’s “Hot House” used the changes to “What Is This Thing Called Love?”
To a casual listener, these could sound like entirely different pieces. The melody was new, the tempo might be different and the improvisation could take the music somewhere completely unexpected. Underneath, though, the harmonic framework was already familiar.
There was an obvious musical advantage. Bebop musicians knew these chord sequences intimately and had already spent countless hours improvising over them, so using the same harmony gave them a ready-made framework for creating something new.
But there was also a practical copyright advantage. Recording somebody else’s composition meant royalties were due to its copyright owners. Write a new melody over the same underlying chord progression, however, and you had a new composition of your own, with the possibility of earning royalties from it instead.
That did not mean contrafacts were invented simply to avoid paying for other people’s songs. Musically, the practice made complete sense, and composers had been reusing harmonic structures long before bebop arrived. But for working musicians creating a new repertoire at speed, the fact that the chords themselves were not protected made the idea especially useful.
Once bebop musicians began doing it regularly, the practice became part of the language of modern jazz. “I Got Rhythm” was especially influential: so many jazz compositions were written over its chord sequence that musicians eventually stopped needing to mention the Gershwin song at all. They simply called them Rhythm changes.
A popular song from 1930 had effectively become a harmonic template on which generations of jazz musicians could build. Some of bebop’s most original music was created not by throwing the old repertoire away, but by taking its underlying structure and building something completely different on top.
We’ve looked at some of the most important contrafacts in jazz, the standards hiding underneath them, and how this simple idea helped reshape the repertoire.
Full article in the comments.
[📸 Public domain via Wikimedia Commons]
