John Aler made his operatic debut in 1977 as Ernesto in Donizetti’s Don Pasquale. Since then, he’s performed in some of the greatest opera houses in the world and has won four Grammys for his classical recordings. Aler shares his thoughts on voice and the future of singing. Also featured: It’s Mozart meets the Clash. A musicologist draws on the heavy metal and grunge of her youth to take classical music where it’s never been before. Plus: The sonic frenzy of a laptop orchestra. And: How to approach a piece of music written by someone else. We’ll also speak with a researcher at the forefront of positive psychology.