A great collection of the Bach Chorales, great to get a vocal ensemble in tune, and listening to each other. There are many to choose from, depending on the level and ability of the ensemble.
Carus-Verlag is a music publishing house specializing in choral and sacred music, founded in 1972 in Stuttgart, Germany. The publisher is particularly recognized for its careful editions of ancient and modern sacred music, including major works by composers such as Bach, Mozart, and Haydn, as well as lesser-known works and new music.