Khandro - // vulcan : //Doesn't evidence have to be tangible?//
What evidence do you have that a tree is beautiful ? //
You seem well wide of the mark in understanding what the word 'evidence' actually means, hence your meaningless references to the creation of music, and again, the notion of beauty in a tree.
I have no 'evidence' that a tree is beautiful, because beauty is an abstract concept, and means different things to different people.
But I have evidence that the tree is real - I can see it touch it, smell it, taste it, and if someone chops it down, I can hear it as well.
If you can offer a meaningful response you requests for evidence, and not just something that you think looks appropriately baffling, you might be able to advance your premise further than you have so far.