Our musical pitch standard is tuned to A=440 Hz (A440), but 528 Hz is what the universe vibrates at. If you ring fine crystal, I think it vibrates to 528 Hz. So why did the USG set the standard at A440?
I think to avoid broken glass. Have a listen to A=444 Hz tuned music. It sounds better.
(Avoid A=432 Hz music. It's Satan's pitch and disgusting.)