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A '''cantor''' (also called a '''chanter, ''' or '''psaltis''') is a lay person in [[minor orders]] who may assist the priest by chanting chants responses and hymns in the services or sacraments of the church. Particularly in the [[Byzantine Chant|Byzantine tradition]], the cantor in charge of doing the music for a service is referred to as the '''''protopsaltis''''', a term which may also refer to an office within a [[diocese]] or whole [[jurisdiction]].

In modern use, the role of the cantor has been replaced, to in some extent, traditions by choirs. In this setting, the cantor is sometimes considered the choir director or the person to lead in congregational singing. In Judaism, the cantor is called a hazzan.