Symphonie fantastique, Op. 14: V. Dream of a Witches' Sabbath

The fifth movement of the Symphonie fantastique is Berlioz at his most deliberately lurid and magnificent. The narrative premise — an artist, drugged on opium, dreams of his own execution and then watches demons and witches dance upon his grave — gives the music license to go places the concert hall of 1830 had scarcely imagined. The beloved theme from earlier in the symphony returns here, but grotesquely transformed: the strings play it as a shrill, angular jig, stripped of its former tenderness and made monstrous. Then the Dies irae — the ancient plainchant of the Catholic mass for the dead — arrives in the brass and low winds, first solemn, then debased into a lurching dance rhythm, as if the sacred is being systematically desecrated. The orchestration is relentlessly cinematic before cinema existed: the col legno bowing of the strings (played with the wooden back of the bow) produces a skeletal, rattling sound that still unsettles. The dynamic range is extreme — sudden silences, explosive brass clusters, the distant tolling of bells. This is music for the witching hour before dawn, for Halloween without irony, for anyone who wants to feel the floor of civilization give slightly beneath their feet. Berlioz invented the program symphony here, writing music that is explicitly about something specific, and this final movement remains one of the most viscerally theatrical achievements in the orchestral canon.