Evolution is a slow and stealthy process.  It creeps up on you when you aren’t paying attention or are on vacation.   Later you notice the new thing and think, “That wasn’t here before.”    So when such an alteration occurred in my lifetime right here in AmerIca, I was impressed with Mr. Darwin’s invention.  Probably you have noticed it too if you are an elder person as I am.   Yes, it is a certified mutation.  And here it is.  Newer people can no longer detect any difference between music and noise.   Watch for the puzzled expression on their face whenever they accidentally experience something lovely or clear, with organized tonal structure and lyrical quality.   Their brain goes into the “What can that be?” mode.  And they are uneasy whenever there is any quietness and relieved again to hear pounding or screechy sounds that they believe to be music.   And associated with that is an urgent need for loudness.  These mutant persons may not even be able to hear sound so much as they need to feel it in their bowels.