SLEEP MUSIC - AN OVERVIEW

four time signature, is in fact a holdover of this image, not a letter C as an abbreviation for "common time", as commonly thought). Though several of these improvements are ascribed to Vitry, and rather current within the Ars Nova treatise, it was a modern day—and private acquaintance—of de Vitry, named Johannes de Muris (or Jehan des Mars) wh