A better version than that which is available on youtube.
IMDB link here
Based upon the short story of H. P. Lovecraft (which the author listed
as one of his personal favourites), this is the 1980 adaptation,
directed by John Strysik.
The music continues to haunt Ward’s dreams, however. One night he hears
a falling sound from Zann’s upstairs room and knocks on the door to see
if he’s okay. Zann invites him in and promises to write down the full
explanation of his “blasphemies.” After he’s filled several handwritten
pages, however, strange tones are heard coming from Zann’s curtained
window; the musician grabs his violin and commences playing it in an
apparent attempt at keeping whatever is lurking outside at bay. During
the melée Zann’s papers are blown through the window and Ward takes the
opportunity to part the curtains and look out...and is confronted with
all manner of unearthly visions.