Debussy was inspired by Javanese Gamelan music when he heard it at the Paris Exposition in 1889. This type of music, originating from the Indonesian island of Java, is known for its intricate rhythms, percussive sounds, and unique tuning system. Debussy was captivated by the exotic and ethereal qualities of Gamelan music, which greatly influenced his own compositions. He incorporated elements such as pentatonic scales, non-Western scales, and unconventional harmonies into his works, creating a new and innovative sound that became a hallmark of his style.