The manual gives a vivid and didactically extremely well developed introduction into polyphonic improvisation in 15th & 16th century styles. It comprises explanations and exercises for different canon techniques (2-4 voices), diminution, clausulas, gymel and fauxbourdon and more, as well as a very good compilation of gregorian cantus firmi, chansons and other historic music to improvise on and a chapter on theoretical treatises. All the explanations and examples are easy to understand even for users who don’t speak french.