The quartet contained Paul Desmond on alto saxophone, Eugene Wright on acoustic bass, and Joe Morello on drums. However, there were some changes and additions on the final track, "Upstage Rumba", as Brubeck explained: The Quartet version of this piece actually evolved in the studio when each person upstaged the other by unexpectedly doing something quite out of character.
The quartet consisted of Paul Desmond on alto saxophone, Eugene Wright on acoustic bass, and Joe Morello on drums. However, "Upstage Rumba" saw some alterations and additions during recording as Brubeck explained: The Quartet's version of the piece evolved in the studio when each musician surprised the others by doing something unexpected outside their usual style.