One of the problems that many parishes with a good music programme faces today is how to sing the Divine Office, especially Vespers. For many years Solemnes has been threatening to bring out a revised Vesperale for common parish use that addresses the problems music directors face: namely how to sing the Office effectively. Some choral parishes, like the Brompton Oratory have maintained the pre-concilliar form of Vespers partly out of continuity, but also in the absence of any meaningful alternative while others such as Westminster Cathedral have addressed the problem by commissioning a Vesperale for their own use.
About 18 months ago I arranged a choir to sing choral Vespers, and it was a task of Herculean proprotion. Firstly comes the problem of structure. The main point of refernce is the Liber Usualis which has all of the chant for a Sunday Vespers (P250 if you care to reference) with the 5 psalms and antiphons that would have been sung in Ordinary Time (commemrative or votive offices can be comiled from the antiphons and psalm tones contained throughout the LU). The new rite of Vespers only has 3 psalms, one of which is a canticle (of the Lamb) which is not used in the old rite. There is the additional problem of the second psalm rotating on a 4-weekly cycle in a way that the old rite didn’t.
The Liber does have each of the psalms in common use set to all 8 plainsong modes, however when taking the antiphons in the modern calendar and adding them to the psalms from the Liber you may find that you are singing an entire vespers to a particular mode, or that in going onto the next psalm a jarring shift in mode is necessary in order to use the correct antiphon with the psalm. Then there is the next problem of finding the appropriate short responsory, or a short responsory at all.
One of the other major problems is the Magnificat. In parishes with limited resources (both in terms of numbers and/or ability of the singers, or the stock of the music library) an antiphon in a less common mode creates the difficulty of selecting a polyphonic Magnificat to compliment it. In a choir of experienced and competent amateurs or professionals there is an abundance of settings, however some of them can be fiendishly complex or aurally difficult to comprehend without good pitch and sight-reading skills where they are written in uncommon modes (such as mode 7). If your resources are more modest then it begs the question of how do you cope? Do you omit the sung antiphon and say it in order to insert a Magnificat the choir knows or sing the antiphon with a plainsong Magnificat, or omit the sung antiphon and magnificat altogether and concentrate on a motet to sing afterwards?
Then there comes the issue of the Canticle of the Lamb. You won’t find it anywhere in the Liber. Neither will you find many of the antiphons that go with it (in fact I’m not sure any of the antiphons for it are in the Liber).
Westminster Cathedral addressed these issues a few years ago by commissioning Peter Wilton to compile a weekday and Sunday Vesperale of the existing chant and composing new chants to plug the gaps. It works incredibly well, sounds fantastic and I won’t at all admit to “borrowing” the problem antiphons and Canticle from it because I’d get into trouble. But there you go, needs must.
The need for chant to meet the requirements of a new vernacular mass are pressing and urgent given the relative pace with which the translations are coming, and the opportunity to get chant into the parishes ahead of the horrors we could be exposed to by the likes of Paul Inwood if there were to be a musical vacuum. Once we have passed that stage, I would suggest the next thing to do is to extend projects like Watershed and the Simple Propers into an Office that is workable at parish level.