[PA Engineer]

I’ve now gotten myself open to the idea of the change in Hz to 440 that some prophets speak of.

You have my interest. Please tell me more about that. 440Hz was one of the frequencies we used (one of my patents) in a non-destructive testing method. That was one of the frequency steps used with a polynomial fit to DC. There were no natural or man made harmonics at that frequency.

[meyer]

Isn’t 440 Hz middle C?
Never mind - that is the fourth A (A4) on the keyboard.
Is that what you’re referring to?

[TEXOKIE]

This was discussed on another thread and I also did a little more research:

https://www.bibliotecapleyades.net/ciencia/ciencia_consciousscience26.htm

https://wakeup-world.com/2015/08/26/the-a432-hz-frequency-dna-tuning-and-the-bastardization-music/

http://www.collective-evolution.com/2013/12/21/heres-why-you-should-convert-your-music-to-432hz/

FWIW