 Christian is featured in recordings from May 12, 1941 (Esoteric ES 548).Charlie Parker and Dizzy Gillespie were both participants at a recorded jam session hosted by Billy Eckstine on February 15, 1943, and Parker at another Eckstine jam session on February 28, 1943 (Stash ST-260; ST-CD-535).Formal recording of bebop was first performed for small specialty labels, who were less concerned with mass-market appeal than the major labels, in 1944.