Wyschnegradsky, Pionier der Mikrointervallik, hat sich auch mit Synästhetik beschäftigt.
In the late 1940s, he translated his “ultrachromatic” compositions into these mesmerizing rainbow color wheels. He applied the concepts of synesthesia, blurring the line between sound and color. Each cell on these drawings corresponds to a different semitone in his complex musical sequences. If you look closely enough, you can follow the spirals as if it were a melody and “listen” to the scores they represent.
(via slate)