Classical music (music created by musicians who are commonly not classically trained, often from a purely oral tradition). Some composers, like Dvořák and Smetana, have used folk themes to impart a nationalist flavor to their work, while others like Bartók have used specific themes lifted whole from their folk-music origins. Certain staples of classical music are often used commercially (either in advertising or in movie soundtracks). In television commercials, several passages have become clichéd, particularly the opening of Richard Strauss' "Also sprach Zarathustra" (made famous in the film "") and the opening section "O Fortuna" of Carl Orff's "Carmina Burana"; other examples
2001: A Space Odyssey (film) line of dialogue or after the final line. Almost no music is heard during scenes with dialogue. The film is notable for its innovative use of classical music taken from existing commercial recordings. Most feature films then and now are typically accompanied by elaborate film scores or songs written specially for them by professional composers. In the early stages of production, Kubrick had commissioned a from Hollywood composer Alex North, who had written the score for "Spartacus" and also worked on "Dr. Strangelove". But during post-production, Kubrick chose to abandon North's music in favor of the now-familiar classical pieces he