Oh, It Hertz! Oh, It Hertz! Oh, It Hertz! Oh, It Hertz! 

Have you ever wondered about the nature of the sounds we hear every day — the crunching of pebbles under our feet, the bursting of bubbles in a glass of soda, or the creak of the wheels of a passing bike? And how can ordinary music influence us? Today, the entire music world is used to the fact that the standard frequency for the A note of the first octave is 440 Hz. But this was not always the case: the decision to change this number from 432 Hz was made only in the last century in Nazi Germany. According to the Sonic Explorer and the main character of the film, Laurie Amat, this was done so it would be easier to control the population of the country. After all, the sound is both information and emotion: a universal mass propaganda weapon, whose power is not obvious, and therefore especially dangerous.
A veteran of Norwegian documentary filmmaking Gunnar Hall Jensen starts the film off with a completely absurd theory — supposedly all modern music owes its sound to the experiments of the Third Reich scientists. But, like any good researcher, he is not afraid of the unknown and strange. And now what at first seemed like a silly joke is turning into an extensive, complex, and extremely extraordinary study about the meaning of sound in human life — including the interviews with experts in the field of sound physics, music psychologists, audiophiles, and sound therapists. Perhaps not all the mysteries of sound can be grasped within a given hour and a half, but after watching, you will hardly be able to hear the world the same way you did before.