American Choral Music (Library of Congress & ACDA Collection)According to the about page for this Library of Congress and ACDA sponsored digital collection, "American Choral Music is a collaboration between the Library of Congress and the Choral Directors Association (ACDA). In 2007, the ACDA and the Library of Congress began a collaborative effort to create this Web site devoted to choral music that would present music in the public domain, available for users to download." This digital collection of choral sheet music includes over 150 pieces, many by renowned American composer, Amy Marcy Cheney Beach, and various members of the Second New England School of American composers also known as the "Boston Six."