Obviously, there is something appealing in having the notes of a musical instrument strike the ears. Even a child reacts to them, moves toward them, and tries to repeat them.
Within the mind, one may imagine musical notes; alas, our imaginings are never so real as life. But it is only because our inner sense is not so well evolved — our inner senses do not detect and report quite the same raw physical sensations as our outer senses. This is just a matter of exercise; we may consciously ritual in order to develop these inner senses.
Complex thoughts do flow across the mind, and they do create a sensation. We are each a kind of Aeolian harp whose strings, instead of played by the wind, are played by qualia. Our inner senses may not be so keen as our ears, but if we neglect them we are robbing ourselves of a profound music.