choirbook

noun2

1. •
   A hymnal, especially one used by members of a choir.

   • For these reasons, the best speculation seems to be that Anne carried the choirbook with her when she left Malines for Paris and from there to England. — 1991
2. •
   (historical) A hymnal large enough to be used by an entire choir at once in a church or cathedral, and showing all the parts to be sung, used during the Middle Ages and Renaissance.

   • Antonio Gardano, who began printing music in 1538, did not produce a folio choirbook until 1562, when both an edition of magnificats by Morales and a volume of masses by Kerle appeared from his press. — 2015