Roy Buchanan (September 23, 1939 – August 14, 1988) was an American guitarist and blues musician. A pioneer of the Telecaster sound, Buchanan was a sideman and solo artist, with two gold albums early in his career, and two later solo albums that made it on to the Billboard chart. Despite never having achieved stardom, he is still considered a highly influential guitar player. Guitar Player magazine praised him as having one of the "50 Greatest Tones of all Time."
In this video Roy shows off his use of the volume control knob with his pinky finger to produce these howling piercing harmonics on this blues gem. Nobody could bend those guitar strings like Roy could. His first recording was My Babe back in 1958 with Ronnie Hawkins, way before anyone heard of Eric Clapton, Jeff Beck, Jimmy Page and Jimi Hendrix.
Jeff Beck was such a big fan of Roy's playing that he dedicated "Cause We Ended As Lovers" to him on his Blow By Blow album. Roy should be in The Rock and Roll Hall Of Fame because of all the Great Guitarists he influenced.
...more about Roy at Wikipedia here