Born in 1951, Francisco Guerrero was to become the totemic figure for contemporary music in Spain, a position neatly encapsulated in this recording of his chamber music (including his Chamber Concerto, Hyades, and Delta Cephei). His music is characterized by its extreme originality and its power to influence. The six pieces on this disc, which feature the soprano voices of Pilar Jurado and Jacqueline Squarcia, reflect the full register to be found across Guerrero's chamber music output and, in particular, its proximity to the world of electro-acoustic music. This is music that is by turns tempestuous, incisive, full of declaratory violence, enigmatic, and subject to abrupt contrasts in texture. Guerrero was responsible for introducing the use of mathematical algorithms into Spanish composition, not by way of some mechanical transformation but through a scrupulous, self-justifying approach, engendering his music with energy and almost visionary vitality.