Conductor Richard Bernas recalls his momentous first encounter with Berio's Sinfonia, a work which reflected and commented on the events of its time, from the Paris riots to the assassination of Martin Luther King, and whose third movement is an extraordinary assemblage of musical and literary quotations. Commentator Gillian Moore explains the significance of the texts which include Levi-Strauss's Le Cru et le cuit and Samuel Beckett's The Unnamable; and we hear from the composer himself, speaking about the work in 1991.