Mount Everest of Musical Scores

When Cornelius Cardew sat down during his lunch breaks at Aldus Books in 1963, hunched over sheets of paper as a trained typographer and assistant art editor, he began creating what would become the Mount Everest of musical scores. Over four years, he produced Treatise—a 193-page score of abstract symbols, lines, and shapes that looked more like a Kandinsky painting than anything Mozart would recognize. The piece contains not a single traditional note.

This wasn't synesthesia in the neurological sense. But Cardew's radical experiment points to something deeper: the persistent tension in Western music between what we hear and what we see, between temporal flow and spatial form.

When the Senses Actually Cross

True synesthesia is a neurological condition where sensory pathways tangle. For composers with chromesthesia, a C major chord doesn't just sound bright—it appears bright, projected onto some internal screen. About 4% of people experience some form of synesthesia, though the specifics vary wildly.

Olivier Messiaen, the French Catholic mystic who became one of the 20th century's most influential composers, clarified the distinction precisely: "I see colours when I hear sounds, but I don't see colours with my eyes. I see colours intellectually, in my head." When he composed Turangalîla-Symphonie, those massive orchestral chords evoked "greenish gold" and "blue-orange" in his mind's eye. His 1963 work Couleurs de la Cité Céleste attempted to translate the Book of Revelation's gemstone-studded heavenly city into sound, with specific chords mapped to jasper, sapphire, and emerald.

The neurological reality mattered less to Messiaen than the creative utility. Those colors gave him an organizational principle beyond traditional harmony, a way to structure sound through visual logic.

The Color Organ Debacle

Alexander Scriabin took this impulse further—perhaps too far. The Russian composer developed an elaborate system linking musical keys to specific colors: C major was red, G major was orange, D major was yellow, and so on around the circle of fifths. Whether Scriabin actually saw these colors or intellectually assigned them remains disputed. The perfect correspondence to music theory suggests the latter.

His 1910 orchestral work Prometheus: The Poem of Fire included a part for "Luce," a color organ that would project shifting hues onto a screen in sync with the music. The instrument barely worked at the premiere. Technical limitations aside, audience members who saw later performances reported confusion more than revelation.

Scriabin died in 1915 from sepsis, his most ambitious project unrealized. Mysterium was planned as a week-long multimedia performance in a purpose-built Himalayan temple, involving sound, light, smell, and touch. It would have no audience—only participants—and would culminate in "a week of bliss followed by the end of the world." Whether this was synesthesia or messianic delusion is an open question.

The disagreement between Scriabin and fellow synesthete Nikolai Rimsky-Korsakov reveals the problem. Both men insisted they experienced genuine color-sound connections. Yet they argued heatedly about which colors corresponded to which keys. Rimsky-Korsakov heard C major as white and D major as yellow; Scriabin's system placed them differently. If synesthesia is neurological, why the mismatch?

From Neurological Fact to Compositional Strategy

Later composers treated synesthesia less as mystical revelation and more as practical tool. György Ligeti described major chords as "red or pink" and minor chords as "somewhere between green and brown," but he also visualized music spatially and geometrically. Those textures and shapes directly influenced his sound clusters in works like Atmosphères—the piece Stanley Kubrick used to such unsettling effect in 2001: A Space Odyssey.

Duke Ellington experienced entire orchestral textures as "shifting shades of light and fabric." Jean Sibelius claimed to hear music when seeing colors or smelling certain scents. Franz Liszt supposedly instructed orchestras to play "a little bluer." Whether these experiences were consistent neurological phenomena or useful creative metaphors hardly mattered to the music they produced.

The Notation Revolution

Morton Feldman's Projection series from the early 1950s used graph paper with boxes and symbols indicating tone color, duration, and tempo while leaving specific pitches to performer discretion. Feldman spent his evenings with abstract expressionist painters Mark Rothko and Philip Guston, and those friendships shaped his scores. He wanted musical notation to function like visual art—suggestive rather than prescriptive, spatial rather than linear.

This wasn't synesthesia. It was a deliberate attempt to import visual thinking into musical practice. The difference matters. Synesthetic composers like Messiaen worked from involuntary sensory experience toward notation. Feldman and Cardew worked backward, using visual forms to escape traditional notation's constraints.

When Cardew embraced Maoism in the late 1960s, he publicly renounced Treatise. Only traditional tonality, he declared, could serve his political movement. The rejection was total. A score that looked like abstract art suddenly seemed bourgeois indulgence.

What Visual Scores Actually Reveal

Twelve years after György Ligeti composed Artikulation, graphic designer Rainer Wehinger created a "listening score"—a visual representation of the electronic work's sounds using shapes, colors, and densities across time. Listeners could follow the score while hearing the piece, watching sound become image.

Wehinger wasn't synesthetic. He was solving a practical problem: how do you notate electronic music with no performers? But his solution tapped into the same impulse that drove Messiaen to describe chords as gemstones and Scriabin to build color organs. Sound exists in time but eludes spatial representation. Vision operates in space but struggles with duration. The synesthetic composer, whether neurologically blessed or creatively strategic, tries to bridge that gap.

The painter Wassily Kandinsky—who produced books of linked poems and woodcuts titled Klänge (Sounds) and wrote play scripts called "The Yellow Sound" and "The Green Sound"—understood this perfectly. Deep blue was his most spiritual color, and he collaborated closely with Schoenberg and Scriabin. At the 1911 Blue Rider exhibition in Munich, abstract visual art and abstract music appeared together for the first time as parallel projects.