I've never given this much thought before. But I've kinda notice that [with most songs] as I listen to music, my brain tends to form some sort of visual imagery about the melody. It's not something I can put my finger on, something hazy, just past my consciousness, bu it's there. It's kind of like a groove in my mind that the music plays over and over, forming certain little blips in my thinking. Maybe I'm making absolutely no sense whatsoever, but I thought I'd put it out there and see if anyone has a clue what I mean.
Visualizing music...hm... Well?