I appreciate the reason for some sort of internationally agreed standard but why 440hz?
430Hz for example, based on middle C at 256Hz (a 4ft organ pipe) is more mathematically precise. There is also this New Age nonsense about 432Hz (which was used by the Italians in the 19th century) which does I admit, work better if you use even temperament.

Topics: music, physics, classical music, mathematics, international standards