The first work on volume 6 is a major, rarely heard Vivaldi choral work, the setting of Beatus Vir, RV795. Alongside typically ebullient writing for chorus and orchestra, the work presents astonishing solo writing. Susan Gritton's soprano, it almost goes without saying, is glorious, but Vivaldi's girls at the Pieta also included special altosyoungsters who were trained to sing unusually low: Beatus Vir presents some of the most remarkable of all this writing, including one ariaPeccator videbit, performed by Hilary Summerswhich is perhaps the lowest alto aria ever written! Alongside such peculiarities, there is much wonderful music, not least of all a rich trio In memoria aeterna. Also on the disc come two splendid choral psalm settings, In exitu Israel and Laudate Pueri. Susan Gritton sings a gloriously lyrical solo motet Salve Regina, as devout and ardent a religious setting as Vivaldi ever wrote. Gritton is surely now one of the great Vivaldi singers of our generation. The remarkable French alto Nathalie Stutzmann, after a string of highly acclaimed recordings for other labels, makes a long-awaited debut on Hyperion singing the famous setting of Nisi Dominus. Her singing is full of colour, variety and nuance, also demonstrating the astonishing coloratura and breath control which has made her one of France's most sought-after stars.