Christopher Fox Trostlieder Exaudi, conducted by James Weeks Kairos Music   British composer Christopher Fox’s latest portrait CD on Kairos focuses on music for vocal ensemble. Exaudi, conducted by James Weeks, is one of the finest groups for recent repertoire in the UK, and they present this program with characteristic care and detail. This is their third disc devoted to Fox’s music   The four Trostlieder Widerwertigkeit des Kriegs (“Poems of comfort in the awfulness of war”) (2015) were written as companion pieces to Heinrich Schütz’s 1648 collection Geistliche Chormusik. Published at the end of the Thirty Years War,