La Edad de Oro (The Golden Age), the title of flamenco dancer Israel Galván’s programme suggests an evening of nostalgia. Certainly, there’s a human tendency to idiolize the past and this is true also of music. The Golden Age of Jazz is a much used term to refer to the period between the 1920s and 1940s, despite the racial discrimination against black jazz musicians. Flamenco purists too, point to the times when a singer, guitarist and dancer defined the art form, despite the fact that flamenco in its earliest incarnation was just a singer accompanied by rudimentary rhythm.  Memories can…