Claude Debussy was a French composer who is widely considered to be one of the most influential composers of the late 19th and early 20th centuries. His music is known for its use of chromaticism, modality, and whole-tone scales, as well as its dreamy, often ethereal quality. One of his most famous works is the Etude, which is a short piece of music that focuses on a particular technical skill or musical concept. The Etude is an important part of Debussy's musical legacy, and it has been performed and recorded by many musicians over the years.