A1) The Chromaccord
"Chroma" plus "accord" means "colors together".
The purpose of the chromaccord is to display a wide range of color interactions using simple controls. In his book Interaction of Color, Josef Albers describes many color phenomena, a group of which depend on neural mechanisms related to afterimage. Albers suggests demonstrations of these using pieces of colored paper that can be switched or moved relative to each other. The chromaccord allows colored areas to be altered by fading colored lights behind a diffusing screen. This instrument is intended to contribute to the art of vusic, time-based live visual performance.
The chromaccord uses an object/surround arrangement with continually changing color combinations to explore the visual experience of kinetic color. The object-surround arrangement, in which a square, circle, or other shape of color is placed on a field of another color, has been used since the nineteenth century to demonstrate proximity effects between colors. The chromaccord performer controls hue, value, and saturation while considering the simultaneous and sequential contrasts produced, playing with color perception on the retina of the viewer.
I have made several chromaccords using light bulbs, color filters, and dimmers. The one described in these documents was made in 1999 with small bulbs arrayed behind a diffusing screen. Groups of bulbs are controlled with dimmers.
A2) Structure of the Chromaccord