The gidayū, located on stage left, is both an actor and musician. He performs the voices of the puppets and accompanies the narrative with music. The gidayū acts out the feelings and words of all the puppet characters. In order to embody a diverse array of characters, ranging from young to old and virtuous to evil, the narrator must possess great stamina and diversity. Shamisen players and narrators usually team up and work together for years. Because of the tremendous energy required to express the narration, multiple pairs are often used throughout one performance. The vocal style of bunraku, called gidayubushi, includes chanting, dramatic storytelling, character voices, and singing. Like the narrative music from which it stems, the shamisen plays excerpts before, in between, and after the narration. The function of the shamisen is to set a pitch, play interludes, and support the expression of the narrator.