“Kind of Blue” has been lauded as one of the most influential albums in the history of jazz. One reviewer has called it a "defining moment of twentieth century music". Since its release on August 17, 1959, it has been regarded by critics as Miles Davis's greatest work. It is his most acclaimed album, and became his best-selling record, cementing him as one of the most successful jazz artists in history. In fact, it is the best-selling jazz record of all time for any artist.

The five-song album was recorded during two sessions at Columbia records’ 30th Street Studio - the first being March 2, 1959, and the second session took place on April 22nd of that year. For this album, Davis led a sextet featuring tenor saxophonist John Coltrane, Julian “Cannonball” Adderley on alto saxophone, pianist Bill Evans, bassist Paul Chambers and drummer Jimmy Cobb. Pianist Wynton Kelly replaced Evans on Freddie Freeloader.

Basing “Kind of Blue” entirely on modality, Davis gave each musician the melody and a set of scales that encompassed the parameters of their improvisation and style for each tune. This allowed greater freedom during improvisation and was revolutionary in the jazz world. Several of the songs on the record have gone on to become jazz standards.

Here is a link to one of them:

"SO WHAT"