As a boy, Franchetti studied composition and piano with his father, the Baron Alberto Franchetti (1860–1942). Baron Franchetti was a wealthy, well-respected and successful composer of the operas often performed at La Scala including Germania (performed by Enrico Caruso, conducted by Arturo Toscanini) and Christoforo Colombo. Urban legend has it that Luigi Illica's libretto of Tosca was first offered to Franchetti who, too busy at the time with other projects, passed it on to his friend Puccini.
Arnold Franchetti studied physics at the University of Florence, music at the Salzburg Mozarteum, and then moved to Munich from 1937 to 1939, where he studied composition and orchestration with composer Richard Strauss. After a brief stint with the Italian army during World War II, Franchetti joined the anti-Mussolini underground resistance in the Italian Alps where he helped Allied airmen escape.
In the USA
Franchetti emigrated to the USA in 1947. He was befriended by Aaron Copland, who helped the young immigrant composer gain a professional footing by arranging performances of Franchetti's chamber music in Boston, New York City, Philadelphia and Washington, D.C. Franchetti took a position at the Hartt School of Music, Hartford, Connecticut in 1948, where he became chair of the theory and composition department, remaining there until his retirement in 1979. Franchetti's composition students have included: Barbara Kolb, Michael Schelle, Robert Beaser, Jonathan Kramer, Jack Elliott, Robert Lombardo, Henry Gwiazda, Norman Dinerstein, Gwynneth Walker, Lee T. McQuillan and many others.
During his 45 years in the United States, Franchetti received composition honors and awards from the Guggenheim Foundation, the National Endowment for the Arts, National Institute of Arts and Letters, and many other prestigious organizations.
In his early work Franchetti experimented with late Romantic and neoclassical styles, but he then developed what Imanuel Willheim called "a non-serial, 12-note compositional language featuring primarily diatonic motivic material".
Franchetti composed music in all genres including orchestral, symphonic, chamber and solo music (including five piano sonatas, significant works that have been analyzed in multiple doctoral dissertations).
Franchetti composed numerous theatre works including the opera, Married Men Go to Hell (1974) and the genre-bending Dracula 1979. Another important Franchetti theatrical work is Lazarus (for narrator and symphonic wind ensemble) based on the book Soul on Ice by 1960's Black Panther activist Eldridge Cleaver.
- "Arnold Franchetti, A Music Professor". New York Times. March 11, 1993. Retrieved 2010-03-07.
- Imanuel Willheim, "Franchetti, Arnold". Oxford Music Online. Accessed December 23, 2011.