precentor

/prɪˈsɛntər/
noun
  1. A person who leads a congregation or choir in singing, especially in a church or synagogue.
    • The cathedral's precentor has a beautiful tenor voice that fills the hall.
    • The precentor stood at the front of the church and began the first hymn.
    • As precentor, she trained the choir and selected the music for each service.