"Now Hear This" continues with "Aaron Copland: Dean of American Music," airing Friday, April 22nd at 9/8c on PBS. #PBSForTheArts [VID: I'm Scott Yoo. I'm at a teaching festival where the pros help guide the next generation. We're playing the music of Aaron Copland to find out how he defined the American sound. He advocated writing in a more lean, strong style. More Copland. More Copland, right. Now Hear This: Get to know Copland, Dean of American Music on Great Performances.] | Great Performance