(b Sortavala, April 15, 1891; d Helsinki, Sept 10, 1945). Finnish composer. He studied at the Helsinki Conservatory (1911–16), in Moscow (1916–17), in Berlin (1921) and in Paris (1925–6). After a period of teaching at the Viipuri Music Institute (1926–32) he lived as a freelance composer in difficult circumstances. With Pingoud and Aarre Merikanto, Raitio was responsible in the 1920s for introducing the first period of chromatic but not serial modernism in Finnish music.