Looking over the detailed descriptions of the songs in the album’s liner notes, it is easy to be struck by the diversity of influences upon klezmer music. “This collection gives us a much broader view of where klezmer music was on the eve of World War I,” said Joel Rubin, a professor of music performance at the University of Virginia and a leading authority on the history of klezmer. “You can really hear that the assumption that klezmer music had gotten totally corrupted in America is not true. In fact, what we see is a back and forth taking place between the artists in...