Wouldn't it have to have evolved for some reason, though? Come from somewhere?
I used to think that...
Take a look at this video:
When they selected the foxes for tameness, other things came along with it (like coat patterns and barking).
My point being that sometimes when one thing gets selected for, other traits just come along for the ride. So selection for intellegence could have brought an appreciation for music with it.
Not every little trait we see has to have selective pressure for it specifically.
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