English composer William Walton said this of film music:"Film music is not good film music if it can be used for any other purpose."
He was excused from military service during the second world war to make music for war propaganda films and drive ambulances.
He was not enthused with the music he made for the film 'The First of the Few'. However his 'Spitfire prelude and fugue' became immensely popular and he extracted it from the film to release it as an orchestral piece. (Spitfire was called the most famous plane of World War 2)
