 We're listening to Lawrence Tibbitt, the most important, most versatile operatic baritone ever produced in the U.S. He's the topic of today's show. And Tibbitt was indeed the first baritone to record songs from George Gershwin's opera. Gershwin, who admired Tibbitt, attended those recording sessions. In fact, he praised Todd Duncan, who sang Porgy on stage, as the Black Tibbitt.