The collection contains rolls of important composers of the period including Busoni, Chaminade, Debussy, Granados, Gershwin, Glazunov, Grainger, Leschetizky, Mahler, Paderewski, Prokofiev, Rachmaninoff, Ravel, Saint-Saëns, Scriabin, Richard Strauss, and Stravinsky all playing their own works. There are numerous important pianists including Backhaus, Cortot, d'Albert, Dohnanyi, Gabrilowitsch, Ganz, Hofmann, Horowitz, Landowska, Lhevinne, Reisenberg, Rubinstein, and Samaroff. The popular music documents playing styles of this earlier era with pianists such as Zez Confrey, Ferde Grofé, Fritz Kreisler, Ernesto Lecuona, Richard Rogers, and Victor Youmans. Rolls of every major company are represented in the collection.