Crazeology, recorded November 4, 1947, is a rhythm changes composition by Bennie Harris, performed by the Charlie Parker Sextet at approximately 252-259 BPM in B-flat with a 32-bar AABA form based on I Got Rhythm. The fast tempo showcases extended solos from all six members of the ensemble: Parker plays one chorus of alto saxophone, J. J. Johnson contributes one chorus on trombone, Miles Davis takes one chorus on trumpet, Duke Jordan adds a half-chorus on piano, Tommy Potter plays a quarter-chorus on acoustic bass, and Max Roach closes with a quarter-chorus on drums. Also known as Little Benny, the tune's driving melody launches the performance into the kind of high-velocity blowing that was a hallmark of the bebop era. The three-horn front line of Parker, Johnson, and Davis navigating these changes at this tempo is a formidable display of collective mastery. Each soloist brings a distinctive voice to the familiar changes, and the democratic distribution of space reflects the band's cohesion. Crazeology remains a well-known rhythm changes vehicle in the jazz repertoire.
