: The "Prelude" establishes the film's two-part structure, preparing the audience for a shift from Marion’s crime-driven narrative to Norman’s psychological horror.
The "Prelude" serves as the primary leitmotif for the film's sense of urgency and flight, appearing most often when characters are escaping in cars.
Bernard Herrmann’s "Prelude" to Psycho (1960) is one of the most influential pieces of film music ever written, defined by its relentless energy and the iconic "Herrmann chord". Herrmann famously opted for a "black and white" score—using only a string orchestra—to mirror the film’s visual aesthetic and budget constraints.
: A minor-major seventh chord (specifically B-D-F-A♭) that creates a sense of unresolved tension and tonal ambiguity.
: The piece is driven by intense ostinati (short, repeating rhythmic patterns) and harsh, driving accents that evoke a feeling of anxiety and inescapable fate.
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