Today is the birthday of one of my favorite composers, Erich Wolfgang Korngold (1897-1957), in my heart since childhood, thanks to viewings of “The Adventures of Robin Hood. But guess what? I love his concert music and his operas too! Here’s a joyous discovery for a spring afternoon: Korngold at the piano, playing his own themes from opera and the movies, at the home of Ray Heindorf, who worked very closely with the composer as an orchestrator on a number of his classic film scores. By 1951, Korngold had already left Warner Brothers. He would work on only one more film, the Richard Wagner biopic “Magic Fire,” released by Republic Pictures in 1955. Hear Korngold sing (if you can distinguish him from Heindorf) and actually speak, especially during the final minutes, accompanied by some fascinating home movies.