Ferruccio Busoni (April 1, 1866 – July 27, 1924) was an Italian composer, pianist, music teacher and conductor. The majority of Busoni's works are for the piano. Busoni's music is typically contrapuntally complex, with several melodic lines unwinding at once. Although his music is never entirely atonal in the Schoenbergian sense, his later works are often in indeterminate key. In the program notes for the premiere of his Sonatina seconda of 1912, Busoni calls the work senza tonalità (without tonality).