That didn’t make any sense. When I say graphical equalizer, I mean the sort of thing you get when you play a MP3 in Windows Media Player - cascading torrents of color to accompany your music. Which is, you’re right, not linguistic at all, but I’m not sure where you got that idea to begin with.
What I’m saying is that the senses themselves are intertwined: it’s not just that you think Thursday is rather yellow-green, or even that you consider it to be inherently yellow-green, but that when you see or think of Thursday, there is yellow-green in your field of vision! Or if it is the written word you see, it is as good as tinted yellow-green for the synaesthete.
To me, A is red. Always has been. But that’s still an abstract association because I do not see the red overlaid on the letter. I think making cross-sense associations is a universal human habit, ranging from just being able to do it when one concentrates on the task to having two different abstract sensory properties permanently tied together in one’s mind (like the color purple and a Pink Floyd album), always. But that’s not synaesthesia, not unless your senses themselves are really physically cross-wired so that pink floyd albums are, literally and not just abstractly, purple when you see them.
There’s a man described on the wikipedia article who experiences a different taste for every word he says, thinks, or reads. I associate the word “Leather” with a coarse, bitter taste, and can even pretend to emulate the taste if I imagine hard enough, but I am not in actuality tasting the word as he does. For him it’s as real as biting down on a strawberry (or whatever it tastes like to him).
Ultimately it’s a game of semantics and arbitrary boundaries, I suppose, as well as the inherent difficulty in conveying abstract concepts like this through language. But I think there’s an important difference between thinking very strongly of a color and seeing that color itself.
BTW Bruno, you look rather brown-blue to me. I’d say my name is not so much a dark green as dark blue, with maybe a yellow highlight. To each his own.