Miles Davis recorded a lengthy psychedelic jazz version
. David Crosby couldn't get his head around Davis' 20-minute interpretation of his song at first. He told Uncut
"Miles played it for me, but I didn't get it because there's no recognizable part of Guinnevere in it. I was more concerned about my tune than I was in the honor of the fact that he used it as a starting point for one of his records. I was kind of snooty about it. But now, obviously, I am completely thrilled."
Originally intended for inclusion on Davis' 1970 Bitches Brew
album, the Jazz legend's cosmic cover didn't make the final cut. It was first made available to the general public on 1979's collection of leftover Davis tracks, Circle in the Round