to the music of a Vietnamese theater troupe, with its effects of resonating gongs, and also to a Javanese gamelan ensemble, with its minimal scales of five notes, its delicate layering of timbres, its air of suspended animation. Gamelan music, Debussy wrote, “contained all gradations, even some that we no longer know how to name, so that tonic and dominant were nothing more than empty phantoms of use to clever little children.”
Debussy also immersed himself in painting and poetry, working out musical analogies for his sharpest aesthetic impressions. Although he was later labeled a musical “impressionist,” Renoir and Monet affected him little; he was influenced more by Anglo-American painters—by Turner’s way of suffusing a landscape with light, by Whistler’s way of subsuming a seascape into a single mood. He read the poetry of Paul Verlaine, whose Fêtes galantes he discovered on the shelves of his piano pupil and lover Marie-Blanche Vasnier. And Verlaine’s perfectly simple and elusive images—the color of moonlight, the music of rustling leaves and falling rain, the unreadable beauty of the sea, the motion of ancient dances, the souls of marionettes—fired Debussy’s musical imagination. To evoke the instrument of “Mandoline,” he wrote strumming chords in which fifths accumulate in dreaming towers. To capture the plain mystery of the line “singing branches,” he let common chords tumble over one another in defiance of textbook rules. In the midst of that kaleidoscopic rush of sounds, the whole-tone scale, one of Debussy’s trademark devices, made an early appearance. This, in turn, brought the young composer to the threshold of so-called atonality.
Musicians and listeners had long agreed that certain intervals, or pairs of notes, were “clear,” and that others were “unclear.” The quoted words can be found on a cuneiform tablet from the Sumerian city of Ur. The clearest intervals were the octave, the fifth, the fourth, and the major third, which form the lower end of the harmonic series (see, again, the opening measures of Thus Spake Zarathustra). By contrast, the tritone had for centuries been considered a disturbing entity. The whole-tone scale, which had begun showing up as an exotic effect in mid-nineteenth-century Russian and Central European music, consists of six equal steps in succession; if one goes upward starting from any C on a piano, it is three white keys followed by three black keys. The scale has the interesting property of being “clear” and “unclear” in equal measure. It abounds in bright major thirds, which can be obtained by moving two steps from any note. It also abounds in tritones (three steps). In visual terms, the scale generates a palette at once luminous and unreal, bright and hazy.
Debussy also made use of pentatonic scales, which he encountered many times at the Paris Exposition—those ancient, elementary five-note scales that crop up in folk traditions all over the world, from Africa to Indonesia. And he continued using diatonic (major-and minor-key) scales, though often in a spirit of nostalgia or satirical play.
The composer thought deeply about the physical facts underlying harmony. Hermann von Helmholtz, in his 1863 treatise, On the Sensations of Tone as a Physiological Basis for the Theory of Music, had explained the physics of the natural harmonic series and attempted to define human perceptions of consonance and dissonance in relation to it. As the waveforms of any two simultaneous tones intersect, they create “beats,” pulsations in the air. The interval of the octave causes a pleasant sensation, Helmholtz said, because the oscillations of the upper note align with those of the lower note in a perfect two-to-one ratio, meaning that no beats are felt. The perfect fifth, which has a three-to-two ratio, also sounds “clean” to the ear. Debussy may have known Helmholtz’s work; he certainly knew the eighteenth-century speculations of Rameau, who had linked standard harmony to the overtone series. Debussy loved to plant octaves and fifths in the bass and let a rainbow of narrower intervals shimmer in the upper air.
Debussy’s emblematic early work is Prelude to “The Afternoon of a Faun,” an orchestral narrative after a poem by Mallarmé, written and revised between 1892 and 1894. In the poem, a faun wonders how best to treasure the memory, or perhaps the dream, of two exquisite nymphs; he plays a song upon his flute, aware that music falls short of the viscerality of experience:
Long shall my discourse from the echoing shore
Depict those goddesses: by masquerades, I’ll strip the veils that sanctify their shades.
The score begins by summoning the very music that the faun plays—a languid melody on the flute, descending a tritone and going back up. The harmony, likewise, swings across the tritone and comes to rest on a richly resonant B-flat dominant seventh, which, in classical harmony, would resolve to E-flat. Here the chord becomes a self-sufficient organism, symbolic of unbounded nature. Then the flute repeats its melody while a new texture forms around it. Debussy thus resists the Germanic urge to develop his thematic material: the melody remains static while the accompaniment evolves. Cloudy whole-tone sonorities mark the horizon of the faun’s vision, where shapes dissolve in mist.
All this suggestion eventually coalesces into a voluptuous, full-orchestral love song in D-flat major. The strings savor long, flowing unison lines, more akin to Indian ragas than to Wagner or Strauss. It is music of physical release, even of sexual orgasm, as Vaslav Nijinsky demonstrated in his undulating dance of the Faun at the Ballets Russes in 1912. “I hold the queen!” Mallarmé’s faun exults. Yet the tritone lingers in the bass, a mystery ungrasped.
With the opera Pelléas et Mélisande, sketched in the early 1890s and then extensively revised before its 1902 premiere, Debussy created a new kind of interior music drama, using Wagner as raw material. The text is by the Symbolist playwright Maurice Maeterlinck, and, as Strauss would do in Salome, Debussy set Maeterlinck’s play word for word, following its riddling prose wherever it took him. The love triangle of Pelléas, his half brother Golaud, and the inscrutable wandering princess Mélisande moves toward a grim climax, but most of the action takes place offstage; the score places the listener in a liquid medium into which individual psychologies have been submerged. Debussy’s established resources—whole-tone scales, antique modes, attenuated melodies that rise from wavering intervals—conjure an atmosphere of wandering, waiting, yearning, trembling.
Later come glimpses of a beautiful country on the other side. When Pelléas and Mélisande finally confess their love for each other—“I love you,” “I love you, too,” without accompaniment—the orchestra responds with a simple textbook progression moving from a tonic chord to its dominant seventh, except that in Debussy’s spectral scoring it sounds like the dawn of creation. A similar transfiguring simplicity overtakes the prelude to Act V, in which we discover that Mélisande has given birth to a child.
At some point, Debussy’s sense of himself as a sonic adventurer, a Faustian seeker, dissipated. By 1900 he was no longer calling for a Society of Musical Esotericism; instead, he prized classic French values of clarity, elegance, and grace. He was also listening intently to Spanish music—in particular, to the cante jondo, or deep song, tradition of Andalusian flamenco. His major works from the first decade of the century—La Mer; the Preludes, Book I, and Estampes for piano; and the cycles of Images for piano and for orchestra—intermingle familiar qualities of unearthliness with dancing movement and clean-cut lyricism. “Voiles” (“Sails”), in the Preludes, confines itself almost entirely to the whole-tone scale. “Steps in the Snow” revolves around hypnotic repetitions of a four-note figure. But “The Girl with the Flaxen Hair” has a melody of the sort that begs to be whistled in the street; many people would be surprised to learn that it had been “composed” at all. And the “Interrupted Serenade,” a Spanish scene, intertwines flamenco guitar with Arabic scales suggestive of Moorish influence. Debussy did not learn to write such music in Faustian isolation; instead, he picked up clues from desultory nights at the opera, operetta, cabarets, and cafés.
Paris bohemia promoted an easy back-and-forth between occult esotericism and cabaret populism, not least because the two worlds were sometimes literally on top of each other. The Kabbalistic Order of the Rose-Cross met in a room above the cabaret Auberge du Clou, and as the cabal debated its arcane philosophy, the insinuating tunes of the café-concert would have floated up from below.
