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432 tuning

This reminds me of numerology

Truth is about tuning - it's a preference in serious classical music. Different conductors/orchestras/symphony pieces are played at different pitches because the interpreter feels it adds to the feel of a piece. AFAIK very few big orchestras tune to A440. I forget the exact numbers but the London Phil usually tunes several cents above and others sometimes lower.

Their theory is that certain instruments when featured sound better at slightly differing pitches. Wouldn't want to be the piano tuner though. hehe
 
According to the article, current 440 tuning only start in the early 1900's

That is true for standard tuning. A4 has been anywhere from 415 Hz in baroque music to 451 Hz in 19th century Europe, as ensembles competed for brighter sound by inching their tuning up.

Many major orchestras today do not tune to A440. 441, 442, and 443 Hz are all in use.

The original standard was supposed to be 439 Hz, but it was too hard to synthesize with high accuracy in the lab back then because 439 is a prime number, hence rounding up to 440.
 
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