Program Notes provide a critical and historical perspective to musical works being performed and give readers context for an informed and intelligent listening experience. In addition, Critical Notes document the aims of the performance and its place in your research program.
"If a musical performance is a form of communication, then program notes can be viewed as a form of translation ..." Dr Ryan Fogg
Fogg, Ryan. “Putting It All Together: Repertoire & Performance--The Lost Art of Program Notes.” Clavier Companion 3, no. 6 (2011): 36–38. http://search.proquest.com/docview/918020141/.