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Corpus Christi Watershed

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Views from the Choir Loft

Pothier De Caetero 1906

Jeff Ostrowski · October 22, 2025

PDF Download • “Marian Antiphon Booklet” (4 pages) + Five Rhythmic Considerations

This 4-page ‘insert’ contains the seasonal Marian antiphons and various settings of the “Kýrie” my parish will be learning.

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Jeff Ostrowski · April 2, 2024

“Response to Dr. Weaver” • 2 April 2024

Catholic musicians must avoid being viewed as “esoteric freaks” who can’t agree on anything and spend their entire lives fighting about things nobody cares about.

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Jeff Ostrowski · November 21, 2023

Jeff Ostrowski’s Performance of Plainsong Attacked as “Inartistic”

The special Vigil of Christmas “Alleluia” sung according to the official rhythm of the Catholic Church.

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Jeff Ostrowski · July 19, 2023

Gregorian Rhythm Wars • “Jeff’s Fourth Response to Patrick” (19 July 2023)

Twenty years ago, I had the opportunity to conduct a week-long interview with Dom Cardine’s former boss.

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Dr. Charles Weaver · November 13, 2022

Gregorian Rhythm Wars • “Charlie’s First Response to Jeff” (13 Nov 2022)

Ostrowski, wishing to avoid fussiness, may justifiably refuse this invitation. But to argue, as he has, that these signs and the prayerful and aesthetic movements they embody are “illicit” is just wildly off the mark.

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Jeff Ostrowski · November 1, 2022

“Gregorian Chant Rhythm Wars” • Ostrowski Vs. Williams

My colleague, Patrick Williams has agreed to enter into a “colloquy” with me vis-à-vis Gregorian rhythm.

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Jeff Ostrowski · July 22, 2022

PDF Download • Professionally-Scanned “Graduale Romanum” (Schwann, 1908) • 1,129 pages!

This is the “pure” Vatican Edition—technically the only version of the rhythm allowed by Church documents!

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Corpus Christi Watershed · July 6, 2022

“Chant Rhythm Wars” • Dueling Lectures!

Ostrowski Vs. Weaver: Solesmes Rhythm, Gregorian Semiology, Dom Mocquereau, Dom Pothier, Mensuralism, and more!

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Jeff Ostrowski · May 17, 2021

“Slanty Wampus” Doesn’t Count

From one of my composition teachers…

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Jeff Ostrowski · February 23, 2021

“Old Solesmes” Method • What’s That?

I recently conducted an experiment…with surprising results.

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Jeff Ostrowski · January 28, 2020

Pothier’s 1906 “De Caetero” Letter • 3 Translations

“The Catholic tradition cannot be that of any special school, either ancient or modern…” —Abbot Pothier

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Jeff Ostrowski · February 22, 2017

“Morae Vocis” acc. to the Vatican Edition

The «Kyriale» contains very few melismatic morae.

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Jeff Ostrowski · October 7, 2015

Sloppy 1953 Schwann

The “white notes” (as Dr. Joseph Lennards called them) are quite sloppy, which really took me by surprise.

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Jeff Ostrowski · December 4, 2013

1934 “Antiphonale Monasticum” (Solesmes Abbey) • Free PDF Download!

Feel free to download all 1,296 pages!

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Corpus Christi Watershed

President’s Corner

    Music List • (15th Sund. Ordinary Time)
    Readers have expressed interest in seeing the ORDER OF MUSIC I created for the 15th Sunday in Ordinary Time (Year A), which is 12 July 2026. Please feel free to download it as a PDF file if that appeals to you. The hymns chosen are some of the most ‘traditional’ I have chosen (and were chosen by our pastor). The ENTRANCE CHANT radiates pure bliss, overflowing with joy.
    —Jeff Ostrowski
    Shortest Psalm In The Bible
    The shortest chapter in the whole Bible—as well as the shortest psalm—is PSALM 116 (“Laudáte Dóminum ómnes géntes”), which consists of just two verses. German-speaking Catholics did something really splendid (PDF) with PSALM 116. I was alerted to this many years ago by none other than Monsignor Robert Alexander Skeris. Click here to download—from different Catholic hymn books—ten (10) different harmonizations for this fabulous hymn.
    —Jeff Ostrowski
    Oldest Latin Eucharistic Hymn
    The Church’s oldest Latin Eucharistic hymn is featured in the Brébeuf Hymnal. Indeed, the legendary Father Adrian Fortescue made a translation of it—matching the original’s meter—which was elevated by the Brébeuf team. For years, we’ve been working on a Spanish hymnal: “Cantoral del Padre Antonio Daniel.” The progress has been slow but steady, and we encourage anyone fluent in Spanish to consider joining the proofreading team. A few days ago, my wife helped me record a rehearsal video for this Spanish version of the Church’s oldest Latin Eucharistic hymn.
    —Jeff Ostrowski

Quick Thoughts

    ‘Ould’ But Not Good
    Dom Samuel Gregory Ould (note the spelling) was a Benedictine monk at FORT AUGUSTUS ABBEY in Scotland. As musician, organist, and composer, Dom Ould was highly regarded. Moreover, he was considered an authority on Gregorian Chant. But not everything found in an old book—or, in this case, an “Ould” book—is necessarily praiseworthy. Consider this page from Dom Ould’s hymnal. Do you see the rhymes? They offend severely by ABR (“Abuse By Reuse”) and are utterly predictable. In my recent article—Two Ways to Defile a Hymn—I addressed this topic.
    —Jeff Ostrowski
    “Reader Feedback” • 22 June 2026
    A reader wrote to us from Virginia: “I really appreciate the 23 harmonizations that you posted on CORPUS CHRISTI WATERSHED for the Daily, Daily, Sing to Mary hymn. I hope to find willing voices in our small Schola Cantorum to try the three-voice version. Carry on, sir! You’re doing the Lord’s work.” While we don’t know this gentleman personally, we note that he earned a Ph.D. (which demonstrates that our blog has something for everybody). 😊
    —Corpus Christi Watershed
    Time and Again We Are Asked…
    John Baptist Singenberger (d. 1924) was a central figure of Catholic Church music. In this utterly fascinating excerpt (Single-Page PDF), Singenberger writes: Time and again we are asked: “Is the Gregorian chant to be accompanied by the organ?” As a young student in Saint Gall, Singenberger befriended SEBASTIAN GEBHARD MESSMER, the future Archbishop of Milwaukee (Wisconsin). The two graduated together in 1861. The school they attended (Saint George’s Seminary) was a “seminary”—but in the older European sense. In other words, it provided a classical education without necessarily leading to ordination. Singenberger remained a layman his whole life, but Messmer was eventually made archbishop—by Pope Saint Pius X—of the very archdiocese in Wisconsin where Singenberger would spend his American career, giving him a powerful ecclesiastical ally.
    —Jeff Ostrowski

Random Quote

“Place the missal in the hand of the faithful so that they may take part more easily and more fruitfully in the Mass; and that they faithful, united with the priest, may pray together in the very words and sentiments of the Church.”

— Ven. Pope Pius XII

Recent Posts

  • “One Nation Under God” • Unapologetically Roman Catholic in the United States of America
  • Organist and Choirmaster (Birmingham Oratory)
  • ‘Ould’ But Not Good
  • PDF Download • Vocal Warm-Up for Choirs — “Harmonized Minor Scale” Exercise
  • “Website Subscriptions” • (Update: 30 June 2026)

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