Is Wozzeck Atonal?

Is Wozzeck Atonal? Wozzeck is often categorized as a so-called twelve-tone or atonal opera. … The twelve-tone technique of composition was devised by Arnold Schoenberg, Berg’s teacher, between 1920 and 1923 in various works that he was composing at the time. Is Wozzeck an expressionism? Wozzeck is first and foremost the child of late Romanticism