via 432 Activists
Feb 12, 2018
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 equipment 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.