 By this time, he was the director of the chapel and had become an outspoken musical spokesman for Lutherans.Walter edited the first Protestant hymnal for choir, "", in Wittenberg in 1524, with a foreword by Martin Luther himself; and for the German-language Deutsche Messe produced in 1527.Following the conclusion of his appointment to Frederick's chapel, Walter became cantor for the Torgau town choir in 1525, a post he would hold until 1548, when he was named court composer for Moritz, Duke of Saxony in Dresden.