"People writing songs that voices never share": Berberian Sound Studio Trailer
And here's the obligatory plot summary:
1976. A mild-mannered British sound engineer named Gilderoy (Toby Jones) arrives in Rome to work on the post-synchronized soundtrack to The Equestrian Vortex, a tale of witchcraft and murder set inside an all-girl riding academy. But as Gilderoy begins to work on this unexpectedly terrifying project, it's his own mind that holds the real horrors. As the line between film and reality blurs, is Gilderoy working on a film--or in one?
The trailer looks appropriately mysterious and creepy, with that subtle menace of the best psychological horror. There's an interesting meta level here also, in which to the audience's ears the sound designer's effects will sound the same to us as if the actual events occurred. The membrane between the film and reality ensures that what is real and fiction to the characters within the film flattens to us.
Plus the title looks like the punchline to a joke asking what you'd call Attila the Hun if he was a Belieber.