Rameau scholar and editor, known for e.g. speeches he made, along with fellow "Ramiste" Léon Gustave Cyprien Gastinel, in 1876, "decrying the musical public's contact with Rameau's works..." (see the collection "French Music, Culture, and National Identity, 1870-1939" (U. Rochester Press, 2008) edited by Barbara Kelly, in which Poisot is mentioned several times in several essays; the latter is a quote from p.211, from "Regionalism. Rameau in late nineteenth-century Dijon : memorial, festival, fiasco" (Katherine Ellis, author of essay).)
