>>11775285
But that's wrong, A=440 happens to be the most common standard at the moment based on what sounds "appealing" when performing western style concert music, but it's steadily creeping higher, 443 being standardized in some western musical circles). There is strong historical evidence that A was as low as 400 Hz several hundred years ago, in Bach's time it averaged around 415 Hz but there was no standard whatsoever until the 19th century and at that time it was noticeably lower than it is today.
There is no mathematical or biological reason why it should be 440, it's completely arbitrary. A purely scientific standard would call for using 430.54 Hz.
tl;dr conspiracy theorists are dumb