Why 432hz Tuning?

That’s a know frequency where many music compositions are made for its

band is positive ,many meditation music is around that frequency.

Just as an addition, I have a friend who is blessed/cursed with perfect pitch. There are two types, relative and absolute. People with an absolute perfect pitch are very much disturbed when music is not aligned with their inbuilt standard.

Google sent me to a scientific article with lots of interesting information about 440 vs 432: https://www.sciencedirect.com/science/article/abs/pii/S1550830718302763#:~:text=4-,The%20current%20reference%20frequency%20for%20tuning%20musical%20instruments%20is%20440,central%20octave%20of%20the%20piano.&text=This%20frequency%20value%20was%20established,standard%20tuning%20for%20music%20worldwide.

The standard for tuning in western music has evolved over centuries. A440 is now regarded as the reference pitch. However, not all recordings will necessary conform to that, especially those from the analogue era when producers sometimes used varispeed on the mastering deck if they wanted to alter a recordings tempo.

@llg98ljk 

Someone once told me the definition of “perfect pitch” is tossing an accordion into a dumpster and it lands on a banjo.