440Hz (an essentially arbitrary assignment, but the modern standard)
Sorry but I couldn't agree less, don't you find it a rather odd coincidence that a concert pitch of 432Hz is quarter tone lower than that of 440? Mathematically speaking it exactly opposite, or more precise; in between the half steps of the notes.
Since the anchor note (concert pitch) is based on multiplications, it means it creates a whole spectrum which is not overlapping with that of an anchored note at 440Hz concert pitch!
An analogy of such a spectrum, if you will, is like a comb. Where each frequency is like a tooth of the comb on a logarithmic scale. If you shift the concert pitch, you shift the whole comb to the left or to the right. Does that make sense?
I try to explain it this way because there is so much misinformation on 432Hz.