My memory has resurrected a bit of my misspent youth: the images and sound track from a great, campy horror flick made at least five decades ago–but not the title. I’m hoping that someone might be able to dredge up the title so I can hunt it down in Netflix or somewhere.
Here’s the premise:
A concert pianist is murdered and, somehow, his left hand is cut off and escapes from the grave. The hand scuttles around the castle, seeking revenge, occasionnally strangling someone but more usually landing on the piano keyboard when no one is looking and playing (for the musically erudite among you) the Brahms transcription for piano left hand of the great Chaconne from J.S. Bach’s Partita #2 for Unaccompanied Violin.
I last saw the movie on TV sometime in the 60’s. I suspect it was filmed in the 50’s or perhaps the late 40’s.
A bit of trivia for you: Pianists ever since Brahms’ time seem unanimous in the opinion that Brahms wrote this transcription for the express purpose of driving other pianists crazy with frustration. It seems that Brahms had extraordinarily large hands and almost no one else is able to play this difficult piece with the left hand only…unless that left hand is severed from the wrist for greater mobility. 
Can anyone provide the title of this movie?