Dodecaphony, also known as twelve-tone technique, is a method of musical composition developed by Arnold Schoenberg in the early 20th century. This innovative approach uses all twelve notes of the chromatic scale in a specific sequence, called a "tone row," ensuring that no single note is repeated until all others have been played. This creates a unique and balanced sound, moving away from traditional tonal music. The goal of dodecaphony is to treat each note equally, avoiding the dominance of any particular pitch. Composers like Alban Berg and Anton Webern expanded on Schoenberg's ideas, contributing to the development of modern classical music.