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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 • Extremely Rare! —Solesmes “Graduale” acc. to the Official Rhythm (1,049 pages)

Jeff Ostrowski · January 6, 2025

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HERE’S A FAMOUS saying: “He can’t see the forest for the trees.” This maxim certainly applies when it comes to CARMEN GREGORIANUM (Gregorian Chant). For this reason, I ask you to “take a step back” for a moment and view the big picture. Gregorian Chant—against all odds—survived the 1960s. It’s not going anywhere. Therefore, how can musicians learn about it? I would argue that most would regret learning from a teacher with intensely idiosyncratic beliefs.1

Common Sense • Doesn’t it stand to reason that we should learn plainsong according to the Church’s official edition, which has lasted 120 years? Doesn’t it stand to reason that we should sing from this edition the way it was intended to be sung by its creators? Pope Saint Pius X explicitly made clear his edition must be sung according to the rules of interpretation laid out by the pontifical commission responsible for its creation. Doesn’t it stand to reason any serious musician would wish to know those rules?

(1 of 2) Historic Release • In the past, we’ve scanned and uploaded many editions which follow the official rhythm. In 2008, my personal copy of the EDITIO VATICANA (Vatican Polyglot Press) was made available as a PDF file. We scanned and uploaded the “LIBER CANTUS GREGORIANI” (1,864 pages) which follows the official rhythm. More “official rhythm” books we’ve scanned and uploaded would have to include the “GRADUALE ROMANUM” (1,129 pages) by the Schwann editors, which is utterly gorgeous. We scanned and uploaded the “Nova Organi Harmonia” (LEMMENSINSTITUUT)—all 2,279 pages—which follows the official rhythm, as well as the editions by the ABBEY OF SAINT-WANDRILLE (1,638 pages) which adhere strictly to the official rhythm. The list of “official rhythm” books we’ve scanned goes on and on: Father Xavier Mathias; Professor Max Springer; Marcel Dupré; Monsignor Franz Nekes; Father Karl Weinmann; and so forth. Indeed, a few days ago we released a book by the VON TRAPP FAMILY SINGERS, and those who listen to the Gregorian Chant recording included there (viz. Puer Natus Est) will notice they follow the official rhythm.

(2 of 2) Historic Release • Today, for the first time in history, we’ve scanned and uploaded the complete GRADUALE ROMANUM in a 1908 edition by the Abbey of Solesmes which follows the official rhythm. We used powerful scanning equipment—resulting in beautiful but massive files—so it was necessary to break it into three parts:

* PDF Download • GRADUALE (Solesmes Abbey, 1908)—Part 1 of 3
* PDF Download • GRADUALE (Solesmes Abbey, 1908)—Part 2 of 3
* PDF Download • GRADUALE (Solesmes Abbey, 1908)—Part 3 of 3

Several photographs of this supremely rare book:

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Fly In The Ointment • There was a problem, however. Dom André Mocquereau (PRIOR of Solesmes Abbey) added tons of modifications to the rhythm of the official edition. He wasn’t allowed to do that—so why did he? From letters recently unearthed, it seems Dom Mocquereau took his actions seeking financial gain, by attaching what he called “value-added” to his editions. In the KYRIALE, his modifications didn’t amount to much (broadly speaking). But in the GRADUALE and the ANTIPHONALE, they often left the official melodies unrecognizable owing to all the illicit markings. For example, in Tecum Princípium almost every note is sullied. Indeed, some call Mocquereau’s modifications “a type of Neo-Mensuralism.” In other words, the rhythm becomes so distorted it resembles the 19th-century (“corrupt”) way of singing plainsong, in which singers observed “longs and shorts.” Countless examples could be cited, but consider how Mocquereau defaced this poor antiphon.

If you examine ancient manuscripts, you won’t find the markings invented by Dom Mocquereau:

*  PDF Download • “Lumen Ad Revelationem Gentium” (2 FEBRUARY)
—An ancient manuscript from Flanders (Belgium).

The Bottom Line • Some used to believe Dom Mocquereau’s markings represented “nuances” in ancient MSS. In light of recent scholarship, however, this would be a very difficult case to make. Even if the “nuances” mean what Dom Mocquereau claims, it would be a grave error to ‘transfer’ markings from 2-3 manuscripts to the official edition, which is a CENTO. The Gregorian repertoire is much larger than 2-3 manuscripts. A responsible scholar must take into consideration the entire manuscript tradition, and not just a handful of MSS—even if he has a particular predilection for certain manuscripts.

1 It’s easy to determine who’s a shoddy scholar. Simply ask: “What other scholars agree with the unique theory you’ve concocted?” You should probably look for a different teacher if you get a response like: “Nobody else agrees. I’m the only one in the galaxy who’s figured this out.”

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

Filed Under: Articles, PDF Download Tagged With: Carmen Gregorianum, Editio Vaticana, Editio Vaticana Preface, Gregorian Rhythm Wars, Inter Pastoralis Officii 1903 Motu Proprio, Inter pastoralis officii Pius X Last Updated: January 7, 2025

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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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President’s Corner

    Dom Pothier • Photo from 1904
    Dom Paul Cagin, in a 1904 publication (L’oeuvre de Solesmes dans la restauration du chant grégorien) made sure to include a beautiful image of Dom Pothier, the legendary abbot of St-Wandrille. Also shown is a very young Dom André Mocquereau. Auguste Pécoul—considered the spiritual “son” of Abbat Prosper Guéranger of Solesmes—wrote as follows on 24 June 1901: “To forestall any confusion, let us remember that there is just one Gregorian notation—that restored, according to the ancient manuscripts, by the eminent Abbot of Saint-Wandrille, Dom Pothier.” ✠
    —Jeff Ostrowski
    PDF • “3-Voice Motet” (Father De Laet)
    I believe 99% of our readers will recognize this hymn tune. Perhaps Father Edgard De Laet should have called it a ‘hymn’ instead of a ‘motet for three voices’—but he’s technically correct, since MOTET is defined as: “a short piece of sacred choral music, typically polyphonic and unaccompanied.” The even verses are for three voices, as you will see if you download the PDF score at #20245. The odd verses may be song a cappella SATB or unison with organ.
    —Jeff Ostrowski
    PDF Download • “Hymn for 2 Voices”
    Readers who click on this video will see that it starts with verses of the “Pange Lingua” hymn by Saint Thomas Aquinas (d. 1274) arranged for two voices. However, there’s a polyphonic refrain (“Tantum Ergo”) for three voices, taken from Kevin Allen’s Motecta Trium Vocum. If your choir is very small, this piece is for you! You can download the PDF score free of charge—and you can also utilize the rehearsal videos for each individual voice—by navigating yourself to #20323.
    —Jeff Ostrowski

Quick Thoughts

    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
    “Reminder” — Month of January (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. Signing up couldn’t be easier: simply scroll to the bottom of any blog article and enter your email address.
    —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 sun’s disc did not remain immobile. This was not the sparkling of a heavenly body, for it spun round on itself in a mad whirl, when suddenly a clamor was heard from all the people. The sun, whirling, seemed to loosen itself from the firmament and advance threateningly upon the earth as if to crush us with its huge fiery weight. The sensation during those moments was terrible.”

— ‘Dr. Almeida Garrett, professor of natural sciences at the University of Coimbra (1917)’

Recent Posts

  • Dom Pothier • Photo from 1904
  • PDF Chart • “Plainsong Rhythm”
  • PDF • “3-Voice Motet” (Father De Laet)
  • PDF Download • “Hymn for 2 Voices”
  • (January 2026) • “Children Singing Plainsong”

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