Interpretation
La mer is a masterpiece of suggestion and subtlety in its rich depiction of the ocean, which combines unusual orchestration with daring impressionistic harmonies. The work has proven very influential, and its use of sensuous tonal colours and its orchestration methods have influenced many later film scores. While the structure of the work places it outside of both absolute music and programme music (see below on the title "Three symphonic sketches") as those terms were understood in the early 20th century, it obviously uses descriptive devices to suggest wind, waves and the ambience of the sea. But structuring a piece around a nature subject without any literary or human element to it - neither people, nor mythology, nor ships are suggested in the piece - also was highly unusual at the time.
As a young boy, Debussy's parents had plans for him to become a sailor. Debussy himself even commented on his fond childhood memories of the beauties of the sea. However, as an adult composing "La mer," he rarely visited the sea, spending most of his time far away from large bodies of water. Debussy drew inspiration from art, "preferring the seascapes available in painting and literature..." to the physical sea. This influence lends the piece its unusual nature.
Debussy called La mer "three symphonic sketches," avoiding the loaded term symphony. Yet the work is sometimes called a symphony; it consists of two powerful outer movements framing a lighter, faster piece which acts as a type of scherzo. But the author Jean Barraqué (in "La Mer de Debussy," Analyse musicale 12/3, June 1988,) describes La mer as the first work to have an "open" form - a devenir sonore or "sonorous becoming... a developmental process in which the very notions of exposition and development coexist in an uninterrupted burst." Simon Trezise, in his book Debussy: La Mer (Cambridge, 1994) notes, however, that "motifs are constantly propagated by derivation from earlier motifs" (p. 52).
Simon Trezise notes that "for much of La Mer, Debussy spurns the more obvious devices associated with the sea, wind, and concomitant storm in favor of his own, highly individual vocabulary" (p. 48-49). Caroline Potter (in "Debussy and Nature" in The Cambridge Companion to Debussy, p. 149) adds that Debussy's depiction of the sea "avoids monotony by using a multitude of water figurations that could be classified as musical onomatopoeia: they evoke the sensation of swaying movement of waves and suggest the pitter-patter of falling droplets of spray" (and so forth), and — significantly — avoid the arpeggiated triads used by Wagner and Schubert to evoke the movement of water.
The author, musicologist and pianist Roy Howat has observed, in his book Debussy in Proportion, that the formal boundaries of La mer correspond exactly to the mathematical ratios called The Golden Section. Trezise (p. 53) finds the intrinsic evidence "remarkable," but cautions that no written or reported evidence suggests that Debussy consciously sought such proportions.
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