“I grew up in England hearing New Orleans music. My mother and father both love it and it was the soundtrack of their teenage years. Jazz fans at that time were split into two groups—traditional jazz fans and those who preferred modern jazz; you could not like both. If you did, you were not serious about your music. Modern jazz fans were the Jean Paul Sartre types, berets and goatees, smoking French cigarettes, trying to appear sophisticated. The others were in...