Healing Hz - which one is real?

 You Tube has many meditation music selections - some say 432 Hz is the best, some say 528Hz is best.

Miracle frequencies. Healing frequencies. Sounds the body resonates with. Sounds that make the body whole. I've been listening to a lot of these since the word "terminal" was spoken to me, about my cancer. It is a difficult word to forget. These videos have very calming music, and that, in itself, has to do some good. Do you have any recommendations for me? I could use some help. If we're all made up of vibrating strings (string theory), then these healing frequencies make a lot of sense to me. 

That is all for now.