I know that the pipe organ = the standard for the villain. This is a Hollywood tradition, but I seem to have found the originator?
Because before the advent of this tradition, the pipe organ represented religious beliefs and represented gods. At the beginning of this movie, you can still see the shadow of the label of the pipe organ. The doctor played a section of Ich Ruf Zu Dir Herr Jesu Christ on the organ.
It's just being used the other way around. The chants popped out by Dr. Kickel are not sacred at all, and it makes the back chill. The most sacred is the most evil, and the cleanest is the dirtiest. The Hollywood director back then had a lot of ideas.
Although similar stalks have been used up now, the old organ villain is pretty cool.
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