[atari 2600]

Originally Posted by acousticrock87

"The earliest documented example of free-form improvisation is a pair of 1949 recordings for Capitol by a group led by Lennie Tristano, "Intuition" and "Digression." These do not, however, seem to have had a direct influence on the later free jazz movement."

Good 'ol Wikipedia.

http://www.sonicyouth.com/gossip/showthread.php?t=6878
http://www.sonicyouth.com/gossip/showthread.php?t=4267