The late Joseph Machlis was professor of music at Queens College of the City University of New York. Among his many publications are Introduction to Contemporary Music (Norton) and singing translations for many operas.
Kristine Forney has been a member of the Music History/Musicology faculty at California State University, Long Beach, since 1978. She specializes in Renaissance music, is a performer and teacher of historical instruments, and is the author of numerous scholarly articles exploring diverse facets of Renaissance musical life and practices. She has taught music appreciation to thousands of undergraduate students, and has been an author of The Enjoyment of Music since 1988.