“Four” is a jazz standard most commonly played in Eb.  Four is an example of tune with dubious authorship; though it has been attributed to Miles Davis, it may be that alto saxophonist Eddie “Cleanhead” Vinson actually wrote the tune, as well as the jazz standard “Tune Up“, which is also traditionally attributed to Miles. Incidentally, “Solar“, “Blue in Green,” “Dig,” and “Donna Lee” are also tunes of dubious authorship.  All are sometimes attributed to Miles Davis, who may not have written any of them.
It was first release in 1956 on Mile’s album “Blue Haze.” Lyrics were later written by Jon Hendricks making it a well known tune for vocalists as well as instrumentalists.  This is a very classic standard that lots of musicians play so it is a great one to know!

30 Days to Better Jazz Playing

Play Along

Videos to learn the melody/changes