The Tallis Scholars and their director, Peter Phillips, have reached the end of an enterprise begun in 1986: to record all 18 masses by the French Renaissance composer Josquin des Prez (c1450/1455-1521), just ahead of his 500th anniversary year. This ninth and final release, recorded in the chapel of Merton College, Oxford, brings together three dating from early middle age reckoned to be his greatest works: Missa Hercules Dux Ferrarie, written for Duke Ercole I d’Este of Ferrara and making musical play of his name; Missa D’ung aultre amer, short and dense in comparison, and Missa Faysant regretz. Phillips, whose impassioned liner notes guide the listener into Josquin’s rarefied but sublime sound world, compares this last to a string quartet of Bartók in its close argument and dazzling economy. As always with the Tallis Scholars, it’s immaculately sung. All told, a mighty achievement.