Sue McKenzie and Ingrid Sawers, leading advocates of the rapidly growing repertory for soprano saxophone and piano, make their second Delphian outing with a survey of some of its recent British highlights. James MacMillan’s poignant lyricism gives way to contained ecstasy, then increasingly unfettered vitality, in a pair of seminal works by Michael Nyman. In evocative miniature dramas by Sally Beamish and Judith Weir the instrument gives voice respectively to the half-human, half-spirit nature of Shakespeare’s Caliban and to the life and death of a condemned Scottish bagpiper.