Rhythm Changes Explained
In this masterclass we’re going to talk about Rhythm Changes. In jazz, Rhythm Changes is a very common form and is used as the basic framework for many well-known and commonly-played tunes. It’s very popular in jam sessions and a crucial part of everyone’s piano repertoire.
The Origins Of Rhythm Changes
Rhythm Changes is a chord progression that is based on a Gershwin song ‘I Got Rhythm’. In the early bebop days musicians became fond of the chord progression and the possibilities, and while performing the actual song ‘I Got Rhythm’, they also started writing their own songs over the chord progression.
The Progression & Contrafacts
This type of composing where you take a chord progression from another song and write your own melody over is called a contrafact, or commonly called a head. I recommend to check out as many contrafacts over Rhythm Changes as you can. Here are few popular ones:
- "Anthropology" by Charlie Parker
- "Rhythm-a-ning" by Thelonious Monk
- "Oleo" by Sonny Rollins
"I Got Rhythm" by George Gershwin
Now a few words about the actual song "I Got Rhythm". As I mentioned earlier, it is written by George Gershwin, and lyrics by his brother Ira Gershwin, and published in 1930.
The tune follows an AABA form, with 2 bar extension in the last A. However, this 2 bar extension is most likely omitted when playing the Rhythm Changes, or when playing a contrafact of this progression.
"I Got Rhythm" is usually played in the key of Bb, although originally it was written in the key of Db, and the solo piano versions I’ve heard played by Gershwin himself have a modulation to F.