Berg wrote "Five Orchestral Pieces". It is one of the first important works he wrote without Schoenberg’s help. The music has some modern chords which must have sounded very shocking to the Viennese audience. On 31 March 1913 Schoenberg conducted a concert in Vienna which included some songs by Berg. People in the audience started to fight and the police had to be called. When Schoenberg wrote to Berg criticising his music, Berg lost all his self-confidence. Slowly he started to get more confidence again. He wrote "Three Orchestral Pieces" op 6. The music sounds quite like Mahler. There are a lot of musical ideas which grow into one another and make a rich sound.