Very nice article. you should check out dr. len horowitz. there is an 1 hour interview with him on youtube called "The Secrets Of Vibration 528hz". It´s very interesting.

But, when i make music and it feels good to me, i don´t really care if its 440hz or 432hz. It´s also really time consuming to tune every instrument in 432hz. and then tune it back to 440hz when you jam with someone else.