Baude Cordier (born c. 1380 in Rheims, died before 1440) was a French composer from Rheims; it has been suggested that Cordier was the nom de plume of Baude Fresnel. Cordier's works are considered among the prime examples of ars subtilior. In line with that cultural trend, he was fond of using red note notation, also known as coloration, a technique stemming from the general practice of mensural notation. The change in color adjusts the rhythm of a particular note from its usual form. (This musical style and type of notation has also been termed "mannerism" and "mannered notation.")