I'm not sure, I think the well tempered clavier is known as "A jól hangolt zongora" in Hungarian (literally "the well-tuned piano"), so the choice of "harmóniák

I'm not sure, I think the well tempered clavier is known as "A jól hangolt zongora" in Hungarian (literally "the well-tuned piano"), so the choice of "harmóniák" was probably deliberate. Any native hungarian speakers please correct me if I'm wrong. Given the change in temperament is a metaphor in the film for human ideology deviating from the natural order (more specifically outside political ideology influencing Hungarian culture) and introducing disharmony, perhaps "harmonies" is more fitting. I absolutely agree with you about the film - more people should experience his work.