Riffs On Riffs

 Last night I was watching some footage from the David Gilmour Luck and Strange tour, specifically Great Gig In the Sky, where in place of the vocal improv by Clare Tory, they had a female vocal ensemble based on it–essentially a “scored” piece. It’s interesting that something spontaneous can later be arranged and played as if it was through-composed. (Brian Eno once called it a “deceit”. If