Impressionism and early modernism: Debussy, Ravel, Stravinsky

For about two hundred years, Western music had worked the same way. A piece announced a key, left it, made you feel the absence, and came home. Everything — melody, form, the timing of climaxes — hung on that journey. Then, in Paris in the 1890s, a composer began writing music in which chords no longer went anywhere, and in 1913 a Russian in the same city wrote a ballet in which the beat itself stopped being dependable. Between them they used up the nineteenth century.

Recognising this period by ear is largely a matter of noticing what has been removed: the pull of the key, the singing line, the reliable downbeat. What replaces them is colour and rhythm.

The French sound: what is actually in the air

Debussy loathed the word Impressionism applied to his music, and it is a borrowed label from painting. But the parallel holds where it matters — edges are soft, the subject is atmosphere rather than argument, and the interest lies in the surface.

Scales that refuse to lead anywhere

Tonal music works because of the semitone. The seventh note of a major scale sits a semitone below the tonic and strains upwards towards it; that strain is what makes a cadence feel like an arrival. Take the semitone away and you remove the engine.

The whole-tone scale does exactly that: six notes, every step a whole tone, no semitone anywhere, and therefore no leading note. Every triad you can build in it is augmented. The result is a sound with no gravity — instantly recognisable, faintly unearthly, and used by every film composer since to signal a dream sequence. Debussy’s prelude Voiles (1910) stays in it almost throughout.

The pentatonic scale — five notes, again with no semitone, the black keys of the piano — does the same job more gently and with an exotic tinge. Debussy also reached for the old church modes: his String Quartet opens in Phrygian, Ravel’s Piano Trio uses Dorian and Lydian. Modes are diatonic, so they sound settled, but their cadences are weak and slightly archaic. All three devices share one aim: harmony that colours rather than propels.

Chords as objects, not events

The second great tell is planing, also called parallelism. A chord voicing — a seventh, a ninth — is fixed in shape and slid bodily up or down, all voices moving in parallel. Every textbook of the time forbade it. The effect is that the chord ceases to be a harmonic move at all and becomes a thickened melodic line, a colour smeared across several notes. The chromatically rising sevenths in Prélude à l'après-midi d'un faune (1894) and the bare parallel fifths of La cathédrale engloutie (1910) are the standard examples, the second deliberately evoking medieval organum.

Alongside this go extended chords — ninths, elevenths and thirteenths, often with altered upper notes — which are sounded, savoured and then simply left, without the preparation and resolution a Romantic composer would have supplied.

Colour, and the instruments that make it

If the harmony is going nowhere, orchestration has to carry the interest, and this is where the period is easiest to spot. Listen for two harps, flute in its low breathy register, cor anglais, muted horn, celesta, antique cymbals, and strings divided into many quiet parts or muted. The brass exists but is used sparingly. The overall dynamic sits between pianissimo and mezzo-forte, and solo woodwind lines emerge and vanish rather than developing.

Compare a German score of exactly the same years. Strauss and Mahler use orchestras just as large, but they use them for weight and for long, striving melodies that arrive at genuine climaxes. That is the real distinction: not how many players, but whether the music is going somewhere.

Rhythm that floats

Debussy writes time signatures and then works against them. Phrases begin off the beat, triplets cut across duplets, and cadences are avoided, so there is nothing for the ear to count from. If you find yourself able to conduct the music confidently in four, think again about the attribution.

Satie: the plain pole

Erik Satie’s Gymnopédies (1888) predate all of this and sound like the opposite of it. One plain chord per bar, one unornamented melodic line, minimal development, no climax, no rhetoric whatsoever. Satie is the flat, ironic, deliberately unimpressive strand of French music, and his stripped repetition points straight at minimalism seventy years later. Hearing plainness and hearing haze are two different French tells, and it is worth keeping them apart.

Gamelan

At the Paris Exposition Universelle of 1889, Debussy heard a Javanese gamelan — a tuned percussion orchestra of gongs and metallophones. Its influence shows up as layered repeating figures moving at different speeds over a slow bass punctuated by gong-like strokes, usually pentatonic. Pagodes, from Estampes (1903), is the piece to have in mind. This layering of independently cycling patterns is another idea minimalism would collect later.

Telling Debussy from Ravel

They share a harmonic vocabulary and are separated by temperament. The confusion is worth resolving properly, because it catches almost everyone.

Feature	Debussy (1862–1918)	Ravel (1875–1937)
Form	Dissolved; sections drift into one another	Classical and audible — dance forms, ABA, clear phrase lengths
Rhythm	Blurred, no firm downbeat	Crisp, often a real dance pulse (habanera, bolero, waltz)
Melody	Short motifs, fragments, few complete tunes	Genuine, shapely tunes you can hum
Texture	Wash, pedal, resonance, silence	Clean lines, each strand audible
Orchestration	Atmospheric; the blend matters	Precise and brilliant; the specific instrument matters
Attitude	Sensuous, evasive	Immaculate, detached, a little mechanical

The one-line rule: Debussy blurs, Ravel polishes. If the piece has clean joints and a tune, and still uses parallel ninths, it is Ravel. Ravel himself said the Impressionist label suited Debussy and not him, and he was right.

The rupture: the Rite of Spring

Stravinsky’s The Rite of Spring (1913) is the loudest single break in the repertoire, and it is easy to recognise because all four of its innovations are audible within seconds.

Irregular metre. The pulse stays rock-steady but the bar lengths change constantly — the closing “Sacrificial Dance” lurches between 3/16, 2/16 and 5/16. Accents land where you do not expect them, so the body never settles into a pattern. Nothing before 1910 does this.

Ostinato. Short figures repeat, unvaried, for long stretches, and the music is built by stacking and abruptly cutting between such blocks rather than by developing themes. This is construction by montage, not by argument.

Percussive strings. The “Augurs of Spring” chord — an E-flat dominant seventh over an F-flat major triad — is stamped out 32 times with hard down-bows and unpredictable sforzandi. Strings are being used as a drum. No nineteenth-century composer asks for a deliberately hard, unsustained string sound.

Bitonality. Two keys at once, held as a stable sonority. The famous instance is the Petrushka chord of 1911 — C major against F-sharp major, a tritone apart — and the Rite applies the same stacking vertically throughout.

Set against Debussy, the difference is total. Debussy removes force; Stravinsky applies it. Debussy softens the beat; Stravinsky sharpens it until it hurts. They are two exits from the same building.

The traps

The vocabulary escaped. Parallel ninths, whole-tone runs and harp glissandi were absorbed wholesale by jazz, light music and film scoring. A hazy pentatonic wash may be from 1965, or last year. Date it by what surrounds it — the recording, the idiom, the instruments — not by the chords alone.

Long careers cross styles. Ravel’s Boléro (1928) is mechanical and jazz-tinged; his Piano Concerto for the Left Hand (1930) is hard-edged. Stravinsky spent the 1920s to 1950s writing spare neoclassicism, then took up serialism in his seventies. “By Stravinsky” narrows the date very little on its own.

Rhythm is the better clock than harmony. Debussy’s harmony was imitated for a century; his rhythmic vagueness was not. If both harmony and rhythm are of the period, you are on solid ground.

How to spot it in ten seconds

Is there a key, and does it pull? If chords sound rich but never resolve, you are past 1890 and probably in France.
Listen for a scale with no semitones. Whole-tone means Debussy, almost always; pentatonic with layered ostinatos means Debussy after the 1889 gamelan.
Are whole chords sliding in parallel? Planing places it 1890–1930.
Check the colour. Harp, low flute, cor anglais, celesta, muted divided strings, all quiet — French, around 1900. Loud brass and long striving melodies — German late Romanticism instead.
Can you tap a downbeat? If not, Debussy. If yes and the metre keeps changing under you, Stravinsky.
Is there a real tune with clean formal joints? Then Ravel rather than Debussy.
Are the strings hammering? Percussive repeated chords with irregular accents means the Rite or its children — 1913 onwards.
Two keys at once, held? Bitonality: Stravinsky or a follower, not the nineteenth century.
Is it startlingly plain? One chord per bar, no development, no climax — Satie, or the minimalists who learned from him.
Finally, ask whether it is pastiche. Film, jazz and the concert hall have all borrowed these sounds. If the surrounding idiom feels later than the harmony, trust the idiom.