Medieval Instrumental Dances - Timothy J. McGee - Google Books

https://books.google.de/books?id=JTTlAgAAQBAJ&pg=PA41&dq=Sonus+illitteratus&hl=de&sa=X&ved=0ahUKEwiV__vA2YTgAhUQ3KQKHXBrA4oQ6AEI

In Europe the tradition of secular dance has continued unbroken until the present. In the late Middle Ages it was an important and frequent event—for the nobility a gracious way to entertain guests, for the peasantry a welcome relaxation from the toils of…