Brouillards ("Mists" or "Fog") is the first piece of

Claude Debussy Achille Claude Debussy (; 22 August 1862 – 25 March 1918) was a French composer. He is sometimes seen as the first Impressionism in music, Impressionist composer, although he vigorously rejected the term. He was among the most influe ...

's second set of piano préludes. It can be considered as the most harmonically complex of the entire series of preludes, hinting at

polytonality Polytonality (also polyharmony) is the musical use of more than one key (music), key simultaneity (music), simultaneously. Bitonality is the use of only two different keys at the same time. Polyvalence or polyvalency is the use of more than one di ...

. The left hand mainly employs the C diatonic collection, modulating shortly in the second theme and reverting in the coda, while the right hand uses the A-flat minor diatonic collection on E-flat, like the left hand modulating briefly before returning.''The Piano Works of Claude Debussy'' by Elie Robert Schmitz

References

Preludes by Claude Debussy 1913 compositions {{classical-composition-stub