Sep 1 Dennis Brain, British classical horn player (Serenade), killed in a car wreck at 38 Sep 11 Petar Stojanovic, Serbian composer, dies at 80 Jean Sibelius (1865-1957) Sep 20 Finnish composer (Valse Triste, Finlandia), dies at 91 Sep 28 Luis Cluzeau-Mortet, Uruguayan composer, dies at 67 Aug 1957 Deaths in Music by Year Oct 1957 Famous Musicians Country Singers Jazz Musicians Opera Singers Pop Stars Rappers Rockers