It is traditional to perform the Lamentations of Jeremiah the Prophet during Holy Week. Here, Collegium Regale, or King's College Cambridge minus the trebles, sings the version by Roland de Lassus in exquisitely indulgent slow moving five-part counterpoint, milking delicious penitence from every line. No sinner could ignore the culminating solemn call to repent: 'Jerusalem convertere ad Dominum.' It is incredible to think that these mature vocalists are mere students who must be recycled every three years. The mystery of the choir achieves its gorgeous blend with such transitory, albeit overlapping, personnel.