Of the various volumes of Two-Part Exercise, this volume introduces the wider freedom of key through comparatively frequent modulation and, at the same time, explores polyphonic devices and styles.
The standard of difficulty places it after 15 Two-Part Exercises, along with Bicinia Hungarica IV (not stocked in the bookstore but can be obtained on request) and the easier items from Tricinia.
Modulations are indicated and unfamiliar chromatic solfa names are inserted.