The document discusses the influence of 20th century composers on modern music. It focuses on Impressionism as one of the earliest musical forms that paved the way for the modern era. Key characteristics of Impressionist music included the use of timbre and color through orchestration, along with new combinations of chords, scales, and an attempt to suggest rather than depict reality. Claude Debussy is highlighted as the principal exponent of Impressionism and inspiration for other Impressionist composers, known for pieces like La Mer and Claire de Lune, the latter of which was featured in the movie Tw