Breaking Free - the minds that changed music. Tom Service explores how to listen to the Second Viennese School - music that exploded with expressive feeling in the early years of the 20th century, and then gradually rebuilt harmony into a new system, using the 12-note series. He explains how the music developed from Arnold Schoenberg's early expressionist ventures into atonality, to the cool jewel-like precision of his pupil Anton Webern. In conversation with art historian Lisa Florman, he finds parallels in the painter Wassily Kandinsky's journey towards abstraction and his theories of shapes and colours. (Kandinsky was a friend of Schoenberg). And composer George Benjamin describes the intricate structures of Webern's music, which greatly inspired his own compositions.