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Pope Saint Paul VI (3 April 1969): “Although the text of the Roman Gradual—at least that which concerns the singing—has not been changed, the Entrance antiphons and Communions antiphons have been revised for Masses without singing.”

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Views from the Choir Loft

PDF Download • Belgian “Ordinary of the Mass” (Organ Accompaniment) — 191 pages

Jeff Ostrowski · March 9, 2023

EFARIOUS. The word nefarious is defined by the dictionary as: flagrantly wicked or criminal. I would love to know how many readers experienced the same nefarious behavior I did while attending college. Each semester, we were forced to purchase outrageously overpriced textbooks. Each of them cost as much as $130.00—which is the equivalent of $342.36 in today’s currency. When the semester was over, we could sell our books back to the university, but usually only received about $8.00 (!) for each book. To make matters worse, each year the self-same textbooks were published in a “new edition.” The content was virtually identical, but all the formatting was altered, which meant the page numbers no longer corresponded. It’s insane that the perpetrators of this nefarious scheme were never prosecuted. (I really hope this situation no longer exists.)

The Opposite • When one encounters such nefarious acts, it’s easy to lose faith in humanity. Contrariwise, every so often one discovers people who—far from being nefarious—are generous, unselfish, and magnanimous. An example would be the professors at the LEMMENSINSTITUUT, who (at the height of WW2!) produced more than 3,000 pages of Gregorian Chant accompaniments. In an attempt to imitate this same spirit of generosity, we release today a professionally-scanned version of NOH Volume 5:

*  PDF Download • KYRIALE ORGAN ACCOMPANIMENTS (191 pages)
—Volume 5 • Nóva órgani harmónia ad graduále júxta editiónem vaticánam.

The following graphic shows the difference in quality between this professional scan and the version I created during the 1990s:

A few photographs of Volume 5:

“As It Was Intended” • The edition by the LEMMENSINSTITUUT does not follow the illicit elongations of Dom Mocquereau. Rather, they present the official edition as it was intended to be sung by its creators.1 The LEMMENSINSTITUUT marks each MMV (“Melismatic Mora Vocis”) with a tiny little dot. I am preparing an edition that contains little arrows to help singers notice the MMVs. My teacher found the MMVs very annoying to discern. I remember him laughing heartily, saying: “Those who followed the pure VATICANA had to place their noses next to the spine of the book to see whether the required width was actually there.” To him, such a procedure seemed absurd. Indeed, the bishop who baptized our children would often ask me: “Jeff, was it really true that singers had to place the plainsong books next to their noses to determine instances of morae vocis?” Indeed, in his 1939 textbook, Josef Gogniat confirms this method. In the following image, the spine of the book is placed close to one’s nose:

Do you see how this “Gogniat-Spine-Nose” method makes it easy to see whether there is blank space equal to (or exceeding) the width of a single note-head?

1 This may have something to do with the fact that the LEMMENSINSTITUUT is located in Belgium, which is the country where Abbat Pothier took refuge with his monastery during the French anti-clerical persecution.

Opinions by blog authors do not necessarily represent the views of Corpus Christi Watershed.

Filed Under: Articles Tagged With: Flor Peeters, Gregorian Chant Accompaniments, Kyriale Organ Accompaniments, Lemmensinstituut, Nova Organi Harmonia, Ordinarium Missae Last Updated: March 9, 2023

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About Jeff Ostrowski

Jeff Ostrowski holds his B.M. in Music Theory from the University of Kansas (2004). He resides with his wife and children in Michigan. —(Read full biography).

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Corpus Christi Watershed

President’s Corner

    Which Mass?
    In 1905, when the Vatican Commission on Gregorian Chant began publishing the EDITIO VATICANA—still the Church’s official edition— they assigned different Masses to different types of feasts. However, they were careful to add a note (which began with the words “Qualislibet cantus hujus Ordinarii…”) making clear “chants from one Mass may be used together with those from others.” Sadly, I sometimes worked for TLM priests who weren’t fluent in Latin. As a result, they stubbornly insisted Mass settings were ‘assigned’ to different feasts and seasons (which is false). To understand the great variety, one should examine the 1904 KYRIALE of Dr. Peter Wagner. One should also look through Dom Mocquereau’s Liber Usualis (1904), in which the Masses are all mixed up. For instance, Gloria II in his book ended up being moved to the ‘ad libitum’ appendix in the EDITIO VATICANA.
    —Jeff Ostrowski
    Like! Like! Like!
    You won’t believe who recently gave us a “like” on the Corpus Christi Watershed FACEBOOK PAGE. Click here (PDF) to see who it was. We were not only sincerely honored, we were utterly flabbergasted. This was truly a resounding endorsement and unmistakable stamp of approval.
    —Jeff Ostrowski
    PDF Download • “Atténde Dómine”
    Although it isn’t nearly as ancient as other hymns in the plainsong repertoire, Atténde Dómine, et miserére, quía peccávimus tíbi (“Look down, O Lord, and have mercy, for we have sinned against Thee”) has become one of the most popular hymns for LENT—perhaps because it was included in the famous Liber Usualis of Solesmes. This musical score (PDF file) has an incredibly accurate version in English, as well as a nice version in Spanish, and also the original Latin. Although I don’t claim to have a great singing voice, this morning I recorded this rehearsal video.
    —Jeff Ostrowski

Quick Thoughts

    “Reminder” — Month of Febr. (2026)
    On a daily basis, I speak to people who don’t realize we publish a free newsletter (although they’ve followed our blog for years). We have no endowment, no major donors, no savings, and refuse to run annoying ads. As a result, our mailing list is crucial to our survival. It couldn’t be easier to subscribe! Just scroll to the bottom of any blog article and enter your email address.
    —Jeff Ostrowski
    PDF Chart • “Plainsong Rhythm”
    I will go to my grave without understanding the lack of curiosity so many people have about the rhythmic modifications made by Dom André Mocquereau. For example, how can someone examine this single sheet comparison chart and at a minimum not be curious about the differences? Dom Mocquereau basically creates a LONG-SHORT LONG-SHORT rhythmic pattern—in spite of enormous and overwhelming manuscript evidence to the contrary. That’s why some scholars referred to his method as “Neo-Mensuralist” or “Neo-Mensuralism.”
    —Jeff Ostrowski
    PDF • “O Come All Ye Faithful” (Simplified)
    I admire the harmonization of “Adeste Fideles” by David Willcocks (d. 2015), who served as director of the Royal College of Music (London, England). In 2025, I was challenged to create a simplified arrangement for organists incapable of playing the authentic version at tempo. The result was this simplified keyboard arrangement (PDF download) based on the David Willcocks version of “O Come All Ye Faithful.” Feel free to play through it and let me know what you think.
    —Jeff Ostrowski

Random Quote

The Princess of the Palatinate once described German Protestantism to Louis XIV with this formula: “In our country, everyone makes up his own little religion.” Every priest, or almost every priest, is at this point today. All the faithful have to say is “Amen.” They are still blessed when the pastor’s religion does not change every Sunday, at the whim of his reading, the foolery he has seen others at, or at his own pure fancy.

— Professor Louis Bouyer (1968)

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