Partbook

A partbook is a format for printing or copying music in which each book contains the part for a single voice or instrument, especially popular during the Renaissance and Baroque. This format contrasts with the large choirbook, which included all of the voice parts and could be shared by an entire choir. The choirbook still followed the convention to notate the parts separately, but within a double page, likewise part books were arranged that they show the one extract of the composition on the same page.