If you ask the average orchestral player when Berlioz’ Symphonie fantastique was composed, you often get an answer that’s about fifty years too late – 1880 or 1890. Such is its staggering modernity, it's hard for any of us to remember that much of it was actually conceived during Beethoven’s lifetime. Even in comparison with Mahler or Shostakovich, the Fantastique is perhaps the most prodigious first symphony in history. Berlioz constructs an entirely autobiographical programme, and simply sets it to music exactly as he wishes, stopping at nothing to express his meaning. Some of the forms are reasonably traditional (the first movement even has an exposition repeat), but much of the music is different from anything that had been heard before. It must have staggered the audience in 1830, for it still astonishes us today. It is, in fact, the first truly Romantic score in history.
The two great influences on Berlioz in the 1820s were Beethoven and Shakespeare. He heard the first performances of Beethoven’s symphonies in Paris and was instantly converted from a gentle conservative like Étienne Méhul or Jean-François Le Sueur into the glorious trailblazer we know and love. Around the same time, he saw Romeo and Juliet, Hamlet and King Lear in the theatre, and was equally liberated by the extraordinary freedom with which the playwright expresses the action. Being Berlioz he went somewhat to extremes: he fell hopelessly in love with Harriet Smithson, as Juliet, Ophelia and Cordelia, and before long he married her.
It was Berlioz' wild passion for Harriet which fired the Fantastique. It is she who is the celebrated idée fixe which appears throughout the work. In the first movement he is awakened from adolescent dreams of love to a brilliant realisation that she is his ideal woman, strong yet graceful, and is terrified of losing her. In the second movement she haunts him at a ball. The highly atmospheric third movement takes place away from Paris, in the countryside. He is peacefully contemplating the future, when suddenly he wonders if she has betrayed him. Instant galvanic fury is only gradually calmed, and the future is bleak.
It is then that the work becomes truly fantastic. He dreams he has killed his beloved, and is being marched to the scaffold. This is new and terrifying music; but even wilder is the last movement. He dreams that he is at a Witches’ Sabbath. Fearful monsters celebrate a Black Mass and, at a peak of horror, his beloved appears as a prostitute, joining the dance with wild abandon. All ends in chaos. But whether chaotic or peaceful, the music always does exactly what the composer wants it to do. Berlioz had the detailed programme printed for all the early performances of his symphony. One can only hazard a guess as to what Harriet must have thought as she gradually understood her own roles in all this tremendous music. It made a huge impression in Paris, and remains Berlioz’ most popular work today.