Voices

Voices is a 1995 psychological drama film loosely based on the life and career of composer Peter Warlock, whose real name was Philip Heseltine. The film stars Jeremy Northam as Warlock and Tushka Bergen as Lily Buxton, his love interest. It was directed by Malcolm Clarke with a screenplay adapted from the book by Mark A. Stuart titled, Double Jeopardy.

Synopsis from Wikipedia, CC BY-SA 4.0. Everything below written here.