432 Activists - Documentary 2018 - 14 chapters
In 1955 the International Organization for Standardization (ISO) adopts A4 = 440 Hz. Since then this frequency is used as reference for all musical instruments, acoustic equipments and sound warnings. A growing community of musicians, scientists, and therapists advocating a new standard tuned at A4 = 432 Hz. This documentary brings together some of the world's top 432 Activists.
A film by Toni Mazzotti.
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