The Plejades Musicæ by Henricus Baryphonus can be seen as a central text for musical theory in the German-speaking world of the early 17th century: in this work actual sounding music is consolidated as an object of musica theorica. Using Baryphonus’s concept of the “triga harmonica” more than two simultaneously sounding elements of a musical phrase can now be recorded in words. The Latin text is presented here in a critical translation. A comprehensive volume of commentary which places the Pleja...