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Corpus Christi Watershed

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 Book of Gregorian Accompaniments (Official Edition)

Jeff Ostrowski · January 31, 2023

OLIEST PRIEST you ever met? That’s a tough question, but one of the holiest was certainly Father Valentine Young (d. 2020). I remember Father Valentine once said: “Jeff, I’ve reached a point in my life where I almost enjoy hearing accompanied plainsong more than unaccompanied.” That statement was two decades ago. At that point in my life, such a statement constituted formal heresy. You see, I used to believe the only ‘valid’ way to sing Gregorian Chant was a cappella (“without accompaniment”). But after almost three decades of singing plainsong, I have come to realize that a well-written accompaniment can add great beauty.1 The following is a recording from last Sunday. You will notice I accompanied our volunteer choir using the NOH harmonies:

Direct Link.

Rare Belgian Book • Corpus Christi Watershed has obtained an extremely rare book of organ accompaniments for Belgium. Readers probably know that each country has special feasts, often celebrating local saints. Interesting items abound in this book. For instance, they wrote an accompaniment for the enormously lengthy SEQUENCE for Saint Lambert of Maastricht (Bishop and Martyr). They wrote an accompaniment for the famous “Gaudeámus” Introit—for the feast of Saint Rumbold of Mechlin—which organists will which to compare with the other “Gaudeámus” harmonizations the LEMMENSINSTITUUT provided in the other volumes.

*  PDF Download • VOLUME VI (“Propers for Belgium”)
—Vol. 6 contains “special propers for the dioceses of Belgium” • 129 pages.

Upcoming Presentation • During this year’s Sacred Music Symposium—which will take place in June of 2023—I will be giving a presentation which will demonstrate (using multiple examples) that excellent Gregorian accompaniments employ the self-same techniques used by the great composers. Monsignor Jules Van Nuffel once wrote:

“A flawless harmonization of Gregorian chant cannot be created by improvisation, no matter the competence and ability of the organist or harmonist.”

Please Help Us • We desire to provide professional and pristine scans for other volumes of the NOH, especially VOLUME V, which contains the Ordinary of the Mass. But professional scans cost a lot of money. We’re a tiny 501(c)3 public charity. We exist solely by the generosity of small donors. We have no endowment; we have no major donors; we run no advertisements; we have no savings. We beg you to consider donating $5.00 per month, or even $3.00 per month.

1 So much depends upon the choir, the acoustic, and each situation. For instance, if I am singing the Requiem Mass with superb singers, I would be annoyed if somebody tried to add an accompaniment to our singing.

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

Filed Under: Articles, Featured, PDF Download Tagged With: Rev Fr Valentine Young OFM Last Updated: January 31, 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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President’s Corner

    PDF Download • “For Pentecost Sunday”
    Yesterday morning, I recorded myself singing the ENTRANCE CHANT for Pentecost Sunday while simultaneously accompanying myself on the pipe organ. Click here to see how that came out. At the end of the antiphon, there’s a triple Allelúja and I just love the chord at the end of the 2nd iteration. The organ accompaniment—along with the musical score for singers—can be downloaded free of charge at the flourishing feasts website. For the record, the antiphon on Pentecost Sunday doesn’t come from a psalm; it comes from the book of Wisdom.
    —Jeff Ostrowski
    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

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

“The chapter orders that any cathedral singer or instrumentalist who uses a paid leave of absence to try out for a post elsewhere shall automatically forfeit his post at Seville Cathedral.” [From “The Life of Father Francisco Guerrero.”]

— Sevilla Cathedral: Chapter Resolution (7 September 1565)

Recent Posts

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

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