According to the Internet source given below, Leon Bismark "Bix" Beiderbecke was an American jazz cornetist, pianist, and composer.
Beiderbecke was one of the most influntial jazz soloists of the 1920s. His solos on Singin' the Blues and I'm Coming, Virginia (both 1927) demonstrate purity of tone and a gift for improvisation. With these two recordings, as well as others, he helped to define the jazz ballad and foresaw what would become cool jazz in the 1950s. In a Mist (1927), one of a handful of his piano compositions and the only one he recorded, fused jazz with classical (mainly Impressionist) influences.
Personal remarks:
In my vinyl collection I have an EP Jazzland (Philips, BBE. 12082) on whch Bix can be heard playing Ol' Man River by Jerome Kern/Hammerstein.

Websites:
	Bix Beiderbecke	Biography by wikipedia.org.