I have been singing opera and concert on the world's greatest stages for over forty years. I have been teaching vocal technique in full vocal studios in Philadelphia, Paris, Munich and New York, with two semesters as a Visiting Lecturer of voice at Carnegie Mellon University.

As a voice teacher it may help to understand that for the last twenty-five years I have been singing three repertoires on these stages. I sing the bass, heldon-baritone and baritone roles. I teach both male and female...