MJO is correct. The classical Plein Jeu always includes the 16'. The reed sound in the pedal (especially en taille) will be distinct enough to be heard against the sound of the Plein Jeu.

I just am re-reading the Douglass book and think it "grand". Ok here's a question: in playing the "tierce en taille" pieces, should the accompanying flute manual be 8' or 16' flutes or both?

Good question. There doesn't seem to be a consensus. One of my teachers said to use 16' and 8' bourdons plus 4' prestant and pedal 8' flute. This site says the same, but others say not to use the prestant, or to use a 4' flute, or not to use the 16', or to use the 8' montre in the accompaniment. The page I linked to says to include the 1-1/3' larigot in the tierce registration; others say to include the cromorne. I realize this is probably no help whatsoever!

4' Prestants rarely work on American organs, and often overpower the tierce combination. Try it on a Clicquot, and it works perfectly! Yes, the Larigot should be in the Tierce combination if you have it. The cromorne is not part of the Tierce - however, there are registrations for "Cromorne en taille." If it just says "en taille," you may actually have a choice of Cromorne or Tierce. You would normally want to combine the Cromorne with other stops - 8' and/or 4' flute, maybe the Nasard. Be wary of the thin-scaled neo-classic American "krummhorns" - they are not quite right. I have been known to be naughty and register things like French horn and clarinet en tailles. Hey, whatever works, right?

You would normally want to combine the Cromorne with other stops - 8' and/or 4' flute, maybe the Nasard. Be wary of the thin-scaled neo-classic American "krummhorns" - they are not quite right

Yes, I regularly add the Nasard to the Cromorne/Krummhorn. If the Cromorne/Krummhorn is not acceptable to me, I will substitute whatever works. I've been known to use a Schalmei instead, especially when our Krummhorn (that's how its spelled on our console) is out of tune.

My understanding is that far too often those reeds were either never or rarely tuned.

My understanding is that well designed and constructed reeds of full (most trumpets and oboes) or half length (most clarinets and krummhorns) resonators may need full tuning once or twice a year. There is usually need for a few "touch ups" during the course of a year. Quarter length reeds (usually vox humana) almost always need relatively frequent tuning. Poorly designed and constructed reeds may never stay in tune.

My comment about waiting until the restoration refers to the humorous, but not entirely accurate, idea that French organs are very seldom tuned. Early recordings by Messiaen and Dupré of their own music are noted for the out-of-tuneness of the organs. The joke is that the powers that be (primarily the government in France) can't be bothered to authorize the tuning of the organ except at the 50-80 year intervals at which the organs are restored - even at St. Sulpice and La Trinité!

Much of the out-of-tuneness would have been in the flue pipes, not the reeds. This is because the reeds are easier to tune than cone-tuned flue pipes and there are fewer of them. Therefore the organist or his or her deputy could relatively easily get a few sour reeds in tune. Meanwhile, all the flue pipes are going sharper or flatter depending on temperature fluctuation in the room, a situation exacerbated by the large organs' chests being installed on different levels, each level with its own ambient temperature since heat rises.

Back home in the US, we are fortunate that, in our climate controlled buildings, the pitch level of the reeds is normally "close enough" to that of the flues. I know that everyone's milage may vary.

On unit organs the tenor or middle C limit is a courtesy to duo players; much better dropouts in the bass than the treble!. Talk of disgusting...

The Benedictus of Couperin's parish mass calls for fond d'orgue & pedalle de flûte. If one goes by the traditional recipes (16' manual and 8' uncoupled pedal) the first chord is a second inversion. One school of thought is that an ear properly educated to appreciate authentic registrations should accept this (I don't think the late Alan Curtis was in this camp, but can't help remembering his remark a propos another asperity "L'editeur trouve cette note pas seulement correcte mais meme belle."). As always, the work of carefully considering the rules isn't finished until one has also defined le bon goût.

This is very true. Listening to the (false) inversions presented by registering the 16' jeux doux in some works (of which that Couperin is a great example) really answers the questions for you. Of course, Couperin was pushing the boundaries and it seems quite clear (e.g. in the Offertoires) that 16' pedal pitch is ok sometimes, too. It was certainly present on the larger French organs by the time Francois was composing.

Personal anecdote:

I asked (in 1976) Charles Fisk about the lack of characteristic stops on his organs for playing Franck. He was dismissive of the value of designing instruments to play this literature because it was, as literature, unimportant.

In later instruments Fisk, and other similar minded builders, showed more comprehensive taste.

When I was in grad school, the Romantic symphonies were clearly second class repertoire. The first class was Bach and people like Guillou. I'm glad this perspective has shifted both in academia and in organ building.

Back to dueling Tierces. It is unfortunate but understandable that the valuable trove of "smaller" pieces which forms the French classic repertoire is still valued more by teachers and performers than by those who design instruments. However, very large instruments should, as MJO says, at least provide quality (even if not authentic) solutions for the Couperin Masses.

I think we must bear in mind that every organ is a transcription machine. No two, even of the same country and period, sound alike or have the same resources. (There was variation even in the most uniform school: French classic.) The building affects the sonority in idiosyncratic ways. Whether or not the composer had a particular sound in mind when writing, we organists, except in very rare cases like St. Sulpice, transcribe everything by playing the instrument in front of us. I find this both a blessing and a curse, depending on…I don't know - breakfast?

Fisk...Frank...this literature....unimportant.

It is often surprising that narrow-mindedness, even the ignorance and smallness, of many people who are great artists, creators, those whom we for certain reasons hold in high esteem. It would seem that, below their gift of a specific genius, these men are really quite unremarkable human persons. It is recorded of Vaughan Williams that he had a remarkably dismissive antipathy to the nascent early music movement, meaning that, while he obviously respected and was influenced by early music, saw no value at all to the nascent performance practice movement. Andras Schiff, one of the greatest pianists of our time, who plays exquisite Bach on the piano, dismissed the harpsichord by saying something to the effect, 'can you imagine listening to two hours of that?'. Yet, I understand, he is making a new CD illustrating Bach on both instruments. The annals of music reveal some very ordinary prejudices and untutored opinions of many of our greatest minds.

Yes, at the height of the baroque revival (which I love) nothing much good could be said of the romantic era and its instruments. Now, in the midst of the romantic revival, the greatest of professors and artists can't find much good to say about anything baroque. The lesson being that we, as compleat musicians, have an obligation to appreciate all, respect all, and see the unique and precious value of all. We can do this whilst we cling to our (very subjective) preferences.