"Richard L. Crocker offers in this book and its accompanying compact disc an introduction to the history and meaning of the Gregorian chant. He explains how Gregorian chant began, what functions and meanings it had over time, who heard it and where, and how it was composed, learned, written down and handed on. His guided tour of the Gregorian chant provides for any student, performer or interested listener a richer understanding of this music."--BOOK JACKET.