Premise: Murder Rock (Italian: Murderock - uccide a passo di danza; also known as Murder-Rock: Dancing Death, Slashdance and The Demon Is Loose!) is a 1984 Italian giallo film starring Olga Karlatos and Ray Lovelock, and written and directed by Lucio Fulci. Fulci recalled the producer forced him to turn the film into a musical with the music of Keith Emerson due to the success of "Flashdance".
Hypothesis: Keith Emerson was hired for the job to create the melodious sounds for Lucio Fulci's Murder Rock after pressure was put on Fulci to transform the work into a musical.