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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

Jeff Ostrowski • Article Archive

A theorist, organist, and conductor, Jeff Ostrowski holds his B.M. in Music Theory from the University of Kansas (2004). He completed studies in Education and Musicology at the graduate level. Having worked as a church musician in Los Angeles for ten years, in 2024 he accepted a position as choirmaster for Saint Mary of the Immaculate Conception in Michigan, where he resides with his wife and children. —Read full biography (with photographs).

Jeff Ostrowski · January 3, 2022

Confusing Feasts of Christmas

Whether one considers the Missale Vetustum or the post-conciliar calendar—or even the 1908 calendar—the feasts which follow Christmas are very confusing. Last year I created this comparison chart. I hope you find it helpful. As far as I can tell, my chart is the first effort to carefully detail the changes made to post-Christmas feasts […]

Jeff Ostrowski · January 1, 2022

1 January 2022 • Alternate Melodies

In a 14th century manuscript, I found some alternate melodies for the “Dóminus vobíscum” and “Et cum spíritu tuo.” I’m not sure we could ever use these at Mass; most priests have a hard enough time with the Editio Vaticana melodies!

Jeff Ostrowski · December 31, 2021

Latin Mass • Conspicuous Snag in “Clarification”

Archbishop Roche says the ‘true’ parishioners are supposed to make it clear the EF people are lowest on the totem pole.

Jeff Ostrowski · December 21, 2021

“Benedictus” (Missa Iste Sanctus) • All voices recorded by Corrinne May

Vatican II said: “The treasury of sacred music is to be preserved and fostered with great care” (SC §114).

Jeff Ostrowski · December 20, 2021

At Least This Is Clear!

Archbishop Roche, current head of the CDW, stated during his video interview as follows: “The Church has given us the celebration of the Mass in two forms. The Ordinary Form is the Mass that was developed under blessed Pope Paul VI in the 1960s. […] The Extraordinary Form is another expression, which is older than […]

Jeff Ostrowski · December 20, 2021

“Communion Service” for the Extraordinary Form?

This statement by the “Una Voce” president strikes me as inaccurate.

Jeff Ostrowski · December 18, 2021

Archbishop Roche: What the Ordinary Form “has to learn” from the Extraordinary Form

“The Extraordinary Form is another expression (older than the 1969 Missal) and is a valid expression of the Church’s liturgy.” —Arthur Roche

Jeff Ostrowski · December 15, 2021

PDF Download • Carol based on “The First Nowell”

I recorded all the voices, to demonstrate how it sounds…

Jeff Ostrowski · December 15, 2021

“Christmas” … or … “Xmas” ?

I remember hearing folks say (erroneously): “Don’t cross out Christmas!”

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Jeff Ostrowski · December 12, 2021

PDF Download • Vespers Organ Accompaniment — “Our Lady of Guadalupe” (12 December)

Vatican II said: “Pastors must see to it that Vespers is celebrated in parishes on Sundays and the more solemn feasts” (SC §100).

Jeff Ostrowski · December 9, 2021

Archbishop Lefebvre Pushed For Vernacular Readings?

Louis Bouyer—the priest chosen to compose “Eucharistic Prayer II”—condemned the liturgical reforms when he saw the results.

Jeff Ostrowski · December 6, 2021

Book Review! • “Society for Catholic Liturgy”

Dr. Aaron James has a double doctorate from a reputable conservatory, which is quite impressive!

Jeff Ostrowski · November 29, 2021

PDF Booklet • First Sunday of Advent Vespers (Organ Accompaniment) — Draft Copy

It may be an ugly booklet, but it got the job done yesterday.

Jeff Ostrowski · November 28, 2021

“O Come, O Come Emmanuel” • Original Setting in Latin for Two Voices

Many centuries ago, this was a “trope” (poetic extension) for a Responsory.

Jeff Ostrowski · November 16, 2021

16 November 2021 • So Valuable!

If people only knew about this this website, they would be amazed. It is called the “snippets” index, and I could not live without it. We’ve tried everything we can think of to let people know about it—and we’ll keep trying—but even some of our most faithful readers don’t realize that hidden treasure!

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Corpus Christi Watershed

President’s Corner

    Heretical Hymns
    As a public service, perhaps a theologian ought to begin assembling a heretical hymns collection. A liturgical book—for funerals!—published by the Collegeville Press contains this monstrosity by someone named “Delores Dufner.” I can’t tell what the lyrics are trying to convey—can you? I detest ‘hymns’ with lines such the one she came up with: “Let the thirsty come and drink, Share My wine and bread.” Somehow, the publication was granted an IMPRIMATUR by Most Rev’d Jerome Hanus (bishop of Saint Cloud) on 16 August 1989. It’s a nice tune, but paired with a nasty text!
    —Jeff Ostrowski
    💲 5.00 💵
    Our tiny 501(c)3 nonprofit organization exists solely by generous readers who donate $5.00 per month. We have no endowment; we have no major donors; we run no advertisements; we have no savings. A donor wrote to us: “I so appreciate all you do and have done, and your generosity is unprecedented. I am honored to be able to make a monthly contribution.” Another monthly donor says: “Thank you for everything CC Watershed does. We are able to add so much solemnity to Holy Mass due to the resources made available here.” Can you spare a few dollars each month to help us survive?
    —Corpus Christi Watershed
    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

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

“In condemning us, you condemn all your own ancestors—all the ancient priests, bishops and kings—all that was once the glory of England, the island of saints and the most devoted child of the See of Peter. For what have we taught, however you may qualify it with the odious name of treason, that they did not uniformly teach?”

— Father Edmund Campion (to the Anglicans about to murder him)

Recent Posts

  • Heretical Hymns
  • Alphabetizing Hymn Titles Inside Hymnals • “Does This Make Any Sense?”
  • Fulton J. Sheen • “24-Hour Catechism”
  • “Reminder” — Month of Febr. (2026)
  • Seminary Music Directors Gather in Houston

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