Clint Mansell’s soundtrack for Darren Aronofsky’s 1998 film Pi marks a pivotal moment in contemporary film scoring: a debut that blends electronic dystopia, minimalist motifs, and industrial textures to amplify the film’s themes of obsession, pattern-seeking, and metaphysical horror. This paper analyzes the soundtrack’s musical language, production techniques, thematic role within the film, intertextual influences, cultural and critical reception, and its contribution to Mansell’s later career.