The Choral Supplement is marvelous and adds wonderful solemnity. Some companies publish a "choir edition" thatâ (TM)s basically a pew edition with harmonies, but the Brebeuf approach is different. This larger book (1,192 pages) carefully notates every single verse, which is a singerâ (TM)s dream. As a supplement, it must be used in conjunction with the pew edition.Â