What are the main responsibilities of a repetiteur?

A repetiteur is primarily responsible for assisting conductors and vocalists in preparing for performances, particularly in Opera and musical theater. They play a crucial role in coaching singers on vocal techniques, diction, and character interpretation. Additionally, repetiteurs often play an instrumental role in rehearsals, providing accompaniment and helping to ensure that the musical score is accurately represented. Their expertise bridges the gap between the musical and theatrical aspects of a production.