Dizzy Gillespie Gillespie left Eckstine's band because he wanted to play with a small combo. A "small combo" typically comprised no more than five musicians, playing the trumpet, saxophone, piano, bass and drums. Bebop was known as the first modern jazz style. However, it was unpopular in the beginning and was not viewed as positively as swing music was. Bebop was seen as an outgrowth of swing, not a revolution. Swing introduced a diversity of new musicians in the bebop era like Charlie Parker, Thelonious Monk, Bud Powell, Kenny Clarke, Oscar Pettiford, and Gillespie. Through these musicians, a new vocabulary of musical
Tritone substitution Tritone substitution The tritone substitution is one of the most common chord substitutions found in jazz and was the precursor to more complex substitution patterns like Coltrane changes. Tritone substitutions are sometimes used in improvisation—often to create tension during a solo. Though examples of the tritone substitution, known in the classical world as an augmented sixth chord, can be found extensively in classical music since the Renaissance period, they were not heard until much later in jazz by musicians such as Dizzy Gillespie and Charlie Parker in the 1940s, as well as Duke Ellington, Art Tatum, Coleman Hawkins, Roy Eldridge