I find Synesthesia interesting as well, but I think it is sort of glorified. I never really knew that sounds were represented as colors until I started playing and writing music, and now I hear the colors, textures, shapes, and numbers of every song I hear or play. The other members of my band have "learned" this behavior too, and I think it has to do with the fact that our music works to conjour those colors and shapes, much like Dev does. I'm not saying I "have" synesthesia, but I do see consistent colors and shapes in tones, and it seems that it was something that was learned, not in-born. There are many ways to access new and exciting parts of the human mind, and not all of them have to do with the hard wiring we are born with.
You know that synaesthesia is sensory crossover, yeah?
Well, does that mean that perhaps when you listen to tones or mixes etc and something feels warm, that it's the same sort of thing?
I've never seen colours or anything, and as a musician I always thought it would be quite interesting to see what its like, but I can feel warmth from tones and mixes.
Maybe it's the same thing, just my body interprets it differently. Meh, who knows?