I know someone with #chromesthesia or sound-to-color #synaesthesia, and I've been dying to know how exactly that mapping works for them. Today I've randomly sat around and tried to think of an approach for an #experiment to find that out, but I'm quickly realizing I probably won't be able to source the equipment needed and put it all together. Which is a shame, because I don't think much is missing – it's mostly just me never having dealt with color calibrating screens before and needing to be sure that I get clean data without artifacts from the environment I'm putting together.
My plan would be to put them in front of a large, calibrated screen showing only a single color at a time that they can fully control using three knobs or sliders (using RGB or any other model). They would hear sounds via over ear headphones with a flat response and try to adjust the color to match their experience. I would probably start with white or pink noise at different intensities, then modulated by some simple filters, and on the other extreme pure frequencies and some combinations, towards more and more complex soundscapes.