The cantor had authority over all liturgical services, and especially all choral offices. He was named by the abbot to
regulate all sung offices, writing on his tablet the order of service, and the list of those charged with singing for the
day. He led the singing and also arranged processions. At many houses, the cantor or precentor supervised the production
of manuscripts. At Saint-Jean, the customary (lectio 27) tells us only that he kept the service books and made corrections
to them. He was also in charge of noting the anniversaries and death dates of the brothers in the chapter book.