Length of voluntaries. in Organ Music Posted February 1, 2018 · Report reply That's about right. Here's an opening benchmark from St Paul's Cathedral's Information for Visiting Organists playing Evensong (where, of course, Stainer was): "[...] Since the focus of Choral Evensong is the choral music, the staff organists normally conclude weekday services with reflective voluntaries. It is, however, perfectly acceptable to play something which develops the style or compositional period of the choir's music. 2'30" is a safe minimum to cover the procession back to [...] the Dean's Aisle, while 4'30'-5' is the upper limit. Sunday and major festivals tend to be on bigger in scale..."