I've been imagining music since I was 3 years old. I remember once when I was about 7, I went on a trip with one of my dad's drivers down to Venice, Louisiana in a "winch" truck to deliver some parts.
While we were driving down the highway the sound of the tires turned into a symphony of sorts.
I found that I could make the symphony play any thing I wanted it to. That was a truly rewarding experience for me; especially   
when I asked "Big Bruce" the driver if he could hear the music, and he couldn't. I could close my eyes and "see" what I was hearing.
 A "silvery" textured form of sorts.