I just don't want to be around her when she mensurates

In a brief attempt to dissuade myself from the viscous self-loathing associated with the fact that I still do not have perfect pitch memory, let's focus for a day on a milestone of notational delineation - the Ars Nova - and its author, Philippe de Vitry, who is not only the sole thing I remember from my shitty music history class, but was a music theorist more daring than 100 minimalists put together (who are still boring as all hell). By the way, de Vitry's was born 715 years ago tomorrow (October 31st).