[indigoabstract]

I've noticed that too. It's like some form of synesthesia, where one sense (audio in this case) influences perception in another seemingly unrelated sense (visuals).

And, perhaps related, in addition to their regular meaning, a lot of things seem to also have an inherent symbolic value. Like going up/going down, on top/at the bottom, sharp/blunt, clear/foggy, etc.

I think that most people, when asked, would prefer going up to going down, even though they have to push against gravity.