The prominent title is In Convertendo, a grand motet from Rameau's early years as a church organist; and the box is labeled Concert/Documentary. Things should be the other way around: this is in fact a DVD presenting an excellent documentary, The Real Rameau, with In Convertendo and three movements from the Pièces de Clavecin en Concerts as lagniappe (Lousiana French for "a small gift thrown in free along with a purchase").