Your right you can and its legal, not sure if its legal to play it in public though and as to whether a artist might be being cheated out of his or her royalties as mentioned in a earlier comment i think they would welcome more exposure of a tune they had long forgotten about. In recent times i can think of the Johnny praye tune Cant get too much love as being a perfect example Butch played it, somone booted a few, lots of people loved it, next thing its on a CD royalties all round.