here is something I found on youtube that is interesting:
432hz sounds fuller and nicer on the ear whereas 440hz sounds thinner. 432 Hz touches the full 12 scale octave overtones of all music, whereas the music of today vibrates at 440 Hz. This 440Hz only touches 8 scale octave overtones. 432hz music touches your heart which makes listening to music a more emotional.
I am conducting research on this. and so far,i like what i am hearing.