Includes translations of two anonymous texts found in ms. Bibliothèque l'Arsenal 3042, with facsimiles of selected leaves from the manuscript. The two texts are entitled: Autre traité des modes de musiques; and, Discourt sur la musique.
The two translated texts expound on Adrian Le Roy's Traicté de musique and on Guillaume-Gabriel Nivers' Traité de la composition de musique.