why do we tune to 440 hz

>> YOUR LINK HERE: ___ http://youtube.com/watch?v=7xgDNuFzsVI

440 Hz has become the standard for tuning - quite recently, really. why do we tune to 440 hz? Check out this brief music history lesson to learn whywe all tune to 440 Hz now! (Wel, most of us tune to 440 Hz, but that's a story for another 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