Throughout a professional career lasting 50 years, Miles Davis played the trumpet in a lyrical, introspective, and melodic style, often employing a stemless harmon mute to make his sound more personal and intimate. But if his approach to his instrument was constant, his approach to jazz was dazzlingly protean. To examine his career is to examine the history of jazz from the mid-'40s to the early '90s, since he was in the thick of almost every important innovation and stylistic development in the music during that period, and he often led the way in those changes, both with his own performances and recordings and by choosing sidemen and collaborators who forged the new directions. It can even be argued that jazz stopped evolving when Davis wasn't there to push it forward. Davis was the son of a dental surgeon, Dr. Miles Dewey Davis, Jr., and a music teacher, Cleota Mae (Henry) Davis, and thus grew up in the black middle class of East St. Louis after the family moved there shortly after his birth. He became interested in music during his childhood and by the age of 12 had begun taking trumpet lessons. While still in high school, he started to get jobs playing in local bars and at 16 was playing gigs out of town on weekends. At 17, he joined Eddie Randle's Blue Devils, a territory band based in St. Louis. He enjoyed a personal apotheosis in 1944, just after graduating from high school, when he saw and was allowed to sit in with Billy Eckstine's big band, which was playing in St. Louis. The band featured trumpeter Dizzy Gillespie and saxophonist Charlie Parker, the architects of the emerging bebop style of jazz, which was characterized by fast, inventive soloing and dynamic rhythm variations.