Early 20th-century experimental musician of innovative, shocking compositions. He championed avant-garde composers.
He abandoned his fame and disappeared in the mid-1920s, but continued writing, only to come back in the 1970s. His final piano sonata was published when he was 97.
He died when he was 108 and was survived by a daughter, a son, five grandchildren, and four great-grandchildren.
He began making piano rolls for the Ampico label after leaving his concert career, recording such composers as Frederic Chopin, Robert Schumann, and Franz Liszt.