McFarland has released “Voices of Opera, 1950s–1970s,” a new 190-page volume by writer and tenor Tony Villecco. The book offers interviews with 22 opera singers whose careers began in the late 1940s and extended through the 1970s. Throughout the book, artists reflect on their training and performance experiences with major figures including Maria Callas, Rosa Ponselle, Beniamino Gigli, Aureliano Pertile, {…}