Conception.

About Conception

"Conception" is a 1949 jazz standard written by George Shearing in the bebop style. The composition is in the key of Db and is noticeable for its chromatic descending chord sequences. The original score was adapted by Miles Davis in 1950, who created an arrangement that kept Shearing's chord changes and main theme, but replaced the composition's bridge and ending with new melodic material. This arrangement is documented on a February 1950 broadcast recording in New York City featuring Stan Getz, J.J. Johnson, and Art Blakey. Davis recorded this same arrangement in October 1951 for his first LP, The New Sounds. Davis also did a complete rewrite of "Conception" in 1950 for his Birth of the Cool nonet, giving the composition the title "Deception". Recorded in March 1950, "Deception" retained the rewritten bridge melody from Davis's 1950 "Conception" arrangement, as well as Shearing's original chord progression. Davis's 1954 Blue Note recording "Take Off" also uses the "Conception" chord progression, including Davis's own additions to the form, but "Take Off" does not include any of Shearing's original melody, and is credited to Davis.