spacechimp49:

The Music Of Erich Zann

A young student of metaphysics is forced to take the only lodging he can afford, a crumbling and decrepit building in a strange part of the city. Every night, he hears strange and unusual music coming from the room above him, music he cannot describe and cannot ignore.
He finds that the music above is being played by Erich Zann; a mute and eccentric German man who plays at night in a local orchestra. Fascinated by the man’s genius, the student tries to befriend Zann and understand why such a great talent chooses to live in such squalor. Eventually, Howard learns of the secret behind Zann’s music, one too terrifying to imagine.

Based upon the short story by legendary author H.P. Lovecraft, “The Music of Erich Zann” is a horror film of haunting beauty and terrifying poetry, filmed in the style of the German Expressionist films of the 1920’s.

I have also seen this one nine times. (Yes, I’m dedicated.)