Perotin organ music played by M-L Jacquet-Langlais

Pérotin (alias Perotinus Magister in some sources): one of the earliest of all composers whose name - or perhaps pseudonym - survives. A leading figure in the Middle Ages' Notre-Dame School, an accomplished practitioner of organum writing (which originally derived from chant), and said to be the first person ever to write four-voice counterpoint. The present work is here heard in a performance by Marie-Louise Jacquet-Langlais, widow of Jean Langlais.