Is used for the vocal music of churches. In church history we meet with divers kinds of these; as, 1. Chant Ambrosian, established by St. Ambrose;
2. Chant Gregorian, introduced by pope Gregory the Great, who established schools of chanters, and corrected the church music. This, at first, was called the Roman song; afterwards the plain song; as the choir and people sing in unison.