Was this song ever attended to be on a studio album? The version on Viva Santana sounds live to me, but it fades out, so was it perhaps a studio outtake? If so, do any other outtakes of this song exist? Another question I have is about the Viva Santana version of "Blues for Salvador", for me by far the best live version (Cleveland) of this instrumental. I have never seen the complete concert on video, is it out there somewhere?