livre de chœur

CONT: Le livre de chœur devait [...] se lire à distance et avait tout intérêt à être grand.

CONT: The music was read by the entire choir grouped around the choir book set on a stand.
OBS: Each part [in the choir book] is notated separately, usually in the configuration that presents, when the book is open, the soprano and tenor parts on the verso of a leaf, and the alto and bass parts on the recto of the next leaf.