In 1949 Miles Davis, Gerry Mulligan and Gil Evans – they'd never met before – gravitated together with the natural affinity of kindred souls. Combined, they gave each other a spiritual boost that resulted in many all-night sessions of earnest discussion, writing and playing–productive work on new musical ideas, new voicings, new concepts of jazz. Their first appearance startled a delighted jazz public, and marked the birth of the cool. Today, these famous Miles Davis instrumentals are as exciting as ever, and here are in all their glory.