April 22, 1949 was the second of three recording dates for the Miles Davis Nonet, a group of forward-thinking musicians that met regularly at composer/arranger Gil Evans’ apartment on 55th Street in Manhattan. The previous session occurred on January 21, 1949 and the third would take place on March 9 of 1950. Music from the three sessions would be combined to create the album Birth of the Cool, released by Capitol Records in 1957, although several titles were released as singles prior to that.

Featuring unusual instrumentation and several notable musicians, the music consisted of innovative arrangements influenced by both jazz and classical music. The ideas heard on Birth of the Cool marked a major development in post-bebop jazz and, as the title suggests, the recordings are considered seminal in the history of the cool jazz genre.

The April 22nd date included Miles Davis on trumpet, Lee Konitz, alto saxophone, Gerry Mulligan, baritone saxophone, J.J. Johnson, trombone, Sandy Siegelstein, French horn, Bill Barber, tuba, John Lewis, piano, Nelson Boyd, bass and Kenny Clarke, drums. The tunes recorded that day were Mulligan’s Venus de Milo, Lewis’ Rouge, John Carisi’s Israel and Boplicity, co-composed by Davis and Gil Evans.

Here is a link to one of the tunes from April 22nd session:

"BOPLICITY"