So many of the best, and most influential, ensembles devoted to performing early music maintain dual careers as performers, but also as educators and scholars. The group known as Alla Francesca (from France, or in the French style) is no exception. The group consists of three central members: Pierre Hamon, who directs and plays historical wind instruments; Brigitte Lesne, singer and harpist; and singer and fiddle player Emmanuel Bonnardot. All of them met earlier in their careers and worked closely with Dominique Vellard in the Ensemble Gilles Binchois; the parent group was an...