Debut: The first three of six originally aired concerts featuring Leonard Bernstein with some of the world's top orchestras. Conductor Leonard Bernstein delivers a series of six lectures on music theory. The talks, originally given at Harvard in 1973, are punctuated with performances by Bernstein, the Boston Symphony Orchestra and the Vienna Philharmonic. In the first program, the maestro examines the origins and development of musical sound, and discusses various scale systems.