The Theory
https://jakubmarian.com/the-432-hz-vs-440-hz-conspiracy-theory/
https://www.reuters.com/article/factcheck-musical-pitches/fact-check-debunking-social-media-claims-about-a432hz-and-a440hz-musical-pitches-idUSL1N2P915O
https://www.golfballdivers.com/products/nike-supersoft
The 432 Hz Meme
https://larouchepub.com/eiw/public/1988/eirv15n35-19880902/eirv15n35-19880902_054-how_the_nazis_ruined_musical_tun.pdf
The Documentary
https://www.imdb.com/title/tt14209910/