Never really thought about it too much, but this seems familiar to me. I don't think it's really anything more than creativity IMO.

I don't really do the whole letter thing but I know what you mean, because with music, there is definitely something there for me. I can 'see' music, and each song is a color or two. It's kind of cool really, and I've thought about it before, but never in the sense that it was different or something.

Anyway, wow...learn something new everyday...pretty awesome stuff Banana.