A friend of Charlie Parker and other jazz greats, Kenneth Rexroth (the "godfather of the Beats") was one of the first poets to read his own poetry to jazz. Several of his articles on jazz are online at the Bureau of Public Secrets website:
"Some Thoughts on Jazz as Music, as Revolt, as Mystique"
http://www.bopsecrets.org/rexroth/jazz.htm
"Five More Articles on Jazz" (re Charles Mingus, Ornette Coleman, etc.)
http://www.bopsecrets.org/rexroth/jazz2.htm
"Disengagement: The Art of the Beat Generation" (re Charlie Parker, etc.)
http://www.bopsecrets.org/rexroth/beats.htm - (Style: Various Jazz Styles)