The context of the Reformation : from Renaissance to Baroque -- Johann Walter : first cantor of the Lutheran Church -- Georg Rhau : printer of early Reformation music -- Hans Leo Hassler : herald of the transition to the "new style" -- Michael Praetorius : conservator of the chorale -- Johann Hermann Schein : Cantor of St. Thomas, Leipzig -- Samuel Scheidt : musician of Halle -- Heinrich Schuetz : tone poet of Saxony.