Not an oldfag but a secondary suggestion is to look into/explain in a way for non-musicians to understand how tuning change from A-432 to A-440 changed things.
I don't know that I've ever heard music tuned to A-432 Hz. Is it much different? Some on here posted how much better it is. What are the physiological effects of both? According to some digs, 440=bad while 432=good.