First read this and then watch the first video in the article : (it's not long, chill out)
440hz Music - Conspiracy To Detune Us From Natural 432Hz Harmonics?
Then, to relate to pop music, watch Adele's performance in 440hz, then altered to 432hz.
While hearing the difference is easier if you relate to pitch centers frequently (see what I did there?), do you feel the difference?