African-American music Ruth persuaded a gospel group to sing in a secular setting, the Apollo Theater, with such success that he subsequently arranged gospel caravans that traveled around the country, playing the same venues that rhythm and blues singers had popularized. Meanwhile, jazz performers began to push jazz away from swing, a danceable popular music towards more intricate arrangements, improvisation, and technically challenging forms, culminating in the bebop of Charlie Parker and Dizzy Gillespie, the cool sounds and modal jazz of Miles Davis, and the free jazz of Ornette Coleman and John Coltrane. African-American musicians in the 1940s and 1950s were developing
John Coltrane played together occasionally in the late 1940s. He was a member of groups led by Dizzy Gillespie, Earl Bostic, and Johnny Hodges in the early to mid-1950s. In the summer of 1955, Coltrane was freelancing in Philadelphia while studying with guitarist Dennis Sandole when he received a call from Davis. The trumpeter, whose success during the late forties had been followed by several years of decline in activity and reputation, due in part to his struggles with heroin, was again active and about to form a quintet. Coltrane was with this edition of the Davis band (known as the "First