Hi--a friend wrote me about this thread, so I'm jumping in, even tho I can't answer the initial Q, haven't not yet seen the documentary. My piano playing is heard throughout the documentary, as it is through a dozen or so of Ken's other documentaries (Civil War, Baseball, Mark Twain, ...). Glad to hear it has connected with you all! Jacqueline Schwab (my not-so-updated web site: jacquelineschwab.com or myspace.com/jacquelineschwab)