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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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Corpus Christi Watershed

President’s Corner

    PDF Download • “Organ Accompaniment”
    Over the past few years, I’ve been harmonizing all the vernacular plainsong Introit settings by the CHAUMONOT COMPOSERS GROUP. This coming Sunday—10 May 2026—is the 6th Sunday of Easter (Year A). The following declaration will probably smack of “blowing my own horn.” However, I’d rank this accompaniment as my best yet. In this rehearsal video, I attempt to sing it while simultaneously accompanying myself on the pipe organ. The musical score [for singers] as well as my organ accompaniment can be downloaded free of charge from the flourishing feasts website.
    —Jeff Ostrowski
    “Gregorian Chant Quiz” • 4 May 2026
    A few days ago, the CORPUS CHRISTI WATERSHED Facebook page posted this Gregorian Chant quiz regarding a rubric for the SEQUENCE for the feast of Corpus Christi: “Lauda Sion Salvatórem.” There is no audience more intelligent than ours—yet surprisingly nobody has been able to guess the rubric. Drop me an email with the right answer, and I’ll affirm your brilliance to everyone I encounter!
    —Jeff Ostrowski
    “Rare Photographs” • Hannibal Bugnini
    On 2 September 2025, we included in this article extremely rare photographs of Archbishop Hannibal Bugnini taken in Iran circa 1979. Bugnini had initially been banished by the pope to Uruguay, but he refused to obey. [This is interesting, since Bugnini relied upon ‘blind obedience’ when it came to modifications of the ancient liturgy.] After he refused to obey the order from the pope, Hannibal Bugnini was banished to Iran. You can also watch a short video of Hannibal Bugnini in Iran, dated 10 November 1979. That’s about a week after the USA embassy hostage crisis began in Tehran, and Pope Saint John Paul II had sent the leader of the Iranian Revolution a special letter.
    —Jeff Ostrowski

Quick Thoughts

    “Reminder” — Month of May (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
    Simplified Version • “Canon in D” (Pachelbel)
    I published an article on 11 November 2023 called Wedding March For The Lazy Organist, which rather offhandedly made reference to a simplified version I created in 2007 for Pachelbel’s Canon. I often use it as a PROCESSIONAL for weddings and quinceañeras. Many organists say they “hate” Pachelbel’s Canon. But I love it. I think it’s bright and beautiful. I created that ‘simplified version’ for musicians coming to grips with playing the pipe organ. It can be downloaded as a free PDF if you visit Andrea Leal’s article dated 15 August 2022: Manuals Only: Organ Interludes Based on Plainsong. Specifically, it is page 84 in that collection—generously offered as a free PDF download. Johann Pachelbel (d. 1706) was a renowned German organist, violinist, teacher, and composer of over 500 works. A friend of Bach’s family, he taught Johann Christoph Bach (Sebastian Bach’s eldest brother) and lived in his house. Those who read Pachelbel’s biography will notice his connection to two German cities adopted as famous hymn tune names: EISENACH and ERFURT.
    —Jeff Ostrowski
    PDF Download • “Anima Christi”
    I received a request for an organ accompaniment I created way back in 2007 for the “Anima Christi” Gregorian Chant. You can download this PDF file which has the score in plainsong followed by a keyboard accompaniment. Many melodies have been paired with “Anima Christi” over the centuries, but this is—perhaps—the most common one.
    —Jeff Ostrowski

Random Quote

“I am of the opinion, to be sure, that the old rite should be granted much more generously to all those who desire it. It’s impossible to see what could be dangerous or unacceptable about that. A community is calling its very being into question when it suddenly declares that what until now was its holiest and highest possession is strictly forbidden and when it makes the longing for it seem downright indecent.”

— Cardinal Ratzinger, 1997

Recent Posts

  • “Reminder” — Month of May (2026)
  • “Englished” Gregorian Chant • 5 Considerations
  • Simplified Version • “Canon in D” (Pachelbel)
  • PDF Download • “Organ Accompaniment”
  • “Gregorian Chant Quiz” • 4 May 2026

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