Why 432hz Tuning?

I remember a concert somewhere in Europe...might have been Italy...when we went in for sound check the horns weren't able to get in tune. Yep...the piano was at 432. LOL They had to rush in a tuner to pull it up to 440.

There is no world standard for tuning. In the U.S, , 440hz A is the accepted standard. I recall buying a tuning fork for my guitar when I first started playing and it was a 440cps A (that's what it was called then). In Europe and in the "Way back" it was pot luck.

Even today, I have albums from the 60's and 70's that If I try to play along with, I have to retune in order to match.  In the old days, string instruments had to tune to the house piano for recording sessions and it may or may not have been in proper tune.

I was just watching this yesterday...

https://www.youtube.com/watch?v=Rt3EAPDn-Ug

Several piano tuners have told me that my circa 1900 Mason Hamlin upright piano will never be able to be tuned at 440hz. It’s just the way it is. Embrace the inconsistencies of tuning. Be flexible when you tune your guitar, banjo, fiddle or electric bass. As long as everybody is playing at the same reference pitch it’ll sound just fine. Enjoy the differences in sound quality the different tunings convey.