Library of Congress. Music for the Nation. Sheet MusicMusic for the Nation: American Sheet Music contains more than 62,500 pieces of historical sheet music registered for copyright during the years 1820 through 1885. Includes popular songs, operatic arias, piano music, sacred and secular choral music, solo instrumental music, method books, and music for band and orchestra. Provides images and audio files which may be searched by keyword, author, subject, and title.