The contents of the archives consist of materials documenting the closing of the magazine; photographs; artwork (originals and reproductions); stage and costume designs; concert and festival programs; supplemental writings and essays by Minna Lederman Daniel; scrapbooks (also on microfilm); and press clippings. Correspondence includes originals of letters sent to Modern music by George Antheil, Alban Berg, Theodore Chanler, Aaron Copland, Henry and Sidney Cowell, David Ewen, Frederick Jacobi, Walter Piston, Paul Rosenfeld, Lazare Saminsky, Arnold Schönberg, Harold Shapero, and Virgil Thomson. Among the roster of contributors represented in this collection are Alban Berg, Bertolt Brecht, André Breton, Aaron Copland, Henry and Sidney Cowell, Edwin Denby, Lincoln Kirstein, Pablo Picasso, Walter Piston, Paul Rosenfeld, Harold Shapero, and Virgil Thomson. Noteworthy original works of art in this collection include self-portraits by Darius Milhaud and Arnold Schönberg, sketches of George Antheil by Boris Smirnoff and Louis Gruenberg by Enrico Caruso, and a lithograph portrait of Paul Hindemith by Richard Heinsich.