Here is Example 9. A Ballade ‘De ce que fol pense souvent remaynt’ by P Des Molins. We are now entering the world of Ars Subtilior (the subtle arts) with some of the most difficult pieces to play and sing, until the 20C. Here is a gentle start, they get more complicated from here. These 15 videos are the examples at the back of a book by Nigel Wilkins, called One Hundred Ballades, Rondeaux and Virelais recently read by me.