Darius Milhaud (pronounced "DAR-yus MEE-oh") (born Marseille, 4 September 1892; died Geneva 22 June 1974) was a French composer. He was a member of the group called "Les Six". He is one of the most important French composers of the 20th century. He wrote more than 400 compositions. His music is often influenced by jazz and polytonality (music in more than one key at once).