When/Why was the musical note A changed to 440 Hz?

I've tried to find out why, but maybe my search algorythm is off(I am sick atm).

Some say it was 432 in the days of Mozart, and that it has better properties for the brain.

Some say it is 438.

What I don't understand is why the change was made at all. I seem to remember learning that 20.000 musicians in france voted no for the new standard. Supposedly Hitler wanted the radio channel frequency changed as well to fit with 440. Yet here we are with 440 being the standard.

Pls help

a pdf for ur consideration

www.wam.hr...

and also

Wikipedia A 440

a brief summation from what i read.

Most of Moazrt's work was written for 432.

However, later musical instrument makers
tried to improve to make their instruments sound
clearer so they could outsell their competition.
However, raising the pitch to over 440 lead to various
singers complaining that this was too high for their
voices so it was dropped back down to 439.
However, the tuning of most instruments was
done by electronic means. In the 30's this
pitch was transmitted by radio wave and since
439 was a prime number it could not be
reproduced electronically with the technology
of the era, so it was raised up a notch to 440
so the universal pitch tone could be broadcast
over the airwaves. And since became standard.

nwo 440hz
www.abovetopsecret.com...

432hz collected info
www.abovetopsecret.com...

those might help too

there are other tunings that are used for esoteric reasons too, like the 'golden' scale, etc.

-B.M

Originally posted by boondock-saint
a pdf for ur consideration

www.wam.hr...

and also

Wikipedia A 440

The wikipedia page tells me nothing of Why.

The PDF on the other hand was quite informative. Cheers for the link

Originally posted by B.Morrison
nwo 440hz
www.abovetopsecret.com...

432hz collected info
www.abovetopsecret.com...

those might help too

there are other tunings that are used for esoteric reasons too, like the 'golden' scale, etc.

-B.M

Looks like the first thread on NWO is the one where I read about the 20.000 musicians.

The other is new, so cheers for link

reply to post by scratchmane


An interesting thread. I was unaware that the Note A had changed frequency. As they say you learn something everyday. The above posters links seem to contain the relevant information so will be having a read through them.
Take Care ,Regards