There are various rationales for selecting organ voluntaries used before and at the conclusion of services. This month, I’ve used three different approaches. On the Second Sunday of Easter, April 7, the prelude was based on the opening hymn (O filii et filiae set by Jean-François Dandrieu) and the postlude was based on the concluding hymn (Gelobt sei Gott set by Healey Willan). For April 14, both the voluntaries will be movements from the same work, Suite Médiévale by Jean Langlais, a French organist and composer for whom I had the privilege of playing in masterclasses many years ago. The Fourth Sunday of Easter is known as “Good Shepherd Sunday,” so I have chosen to play two Pastorales, one by César Franck, a mid-19th-century composer, and the other by Domenico Zipoli, who composed during the early 18th century.