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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 · October 27, 2020

ICEL added “Died” to the Nicene Creed • (I am not kidding!)

I bet you never noticed this, but here’s the proof! • Believe it or not, the Nicene Creed never says Our Lord “died,” and this article provides full documentation; also included are beautiful manuscript images from the greatest Dutch illuminated manuscript in the world: Catherine of Cleves Hours (15th century MS.)+

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Jeff Ostrowski · October 25, 2020

“Homily for the Feast of Christ the King” (EF) • Father Valentine Young, OFM

In many of His parables and teachings, Christ let us know that His Kingdom on earth was always what I am going to call “an unfinished product.”

Jeff Ostrowski · October 23, 2020

PDF Download • Extremely Simple (Yet Gorgeous) Polyphonic Funeral Mass

These rehearsal videos were recorded by one person, and he apologizes for the poor singing quality…

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Jeff Ostrowski · October 21, 2020

20 October 2020 • “What we can’t share”

Almighty God has given to us the example of the Jesuit Martyrs of North America, whose feast day we celebrated yesterday. Of course, along with those eight martyrs we honor their associates, e.g Father François Bressani. I can’t share with you the torments Father Bressani underwent at the hands of Iroquois: it is too brutal. […]

Jeff Ostrowski · October 19, 2020

19 October 2020 • Feast of Father Brébeuf

When the young priest saw the burnt and bleeding body of his superior, aghast and trembling he spoke the words of St. Paul: “We are made a spectacle to the world, to angels and to men.”

Jeff Ostrowski · October 18, 2020

Dom Pothier • “To The Eyes And To The Ears”

For years, I couldn’t understand this business about “the eyes and the ears.” What did Pothier mean? Then it hit me. • Topics include Dom Joseph Pothier, the mora vocis, Abbot Pothier’s brother (Dom Alphonse Pothier), Dom Lucien David, Dom Paul Jausions, and a truly magnificent story about Pope Pius X and Abbot Pothier, which is essential reading+

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Jeff Ostrowski · October 16, 2020

The “Mora Vocis” • What is that?

The “Pre-NOH” editions have quite an idiosyncratic way of lengthening the neumes. • Fulsome illustrations are included examining and explaining the mora vocis of the Vatican edition; also mentioned is Dom André Mocquereau, Rafael Cardinal Merry del Val, and Pothier’s Liber Gradualis (1883)+

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Jeff Ostrowski · October 14, 2020

13 October 2020 • Chopin talks Bach

My “pianist pedigree” goes from my teacher through Wiktor Łabuński through Felix Blumenfeld, who studied with Anton Rubinstein. I always considered myself part of the “Bach-Mozart-Chopin school” as opposed to the “Handel-Beethoven-Liszt school.” (Needless to say, there’s great overlap between these schools.) Before giving a concert, Frédéric Chopin would always shut himself up in a […]

Jeff Ostrowski · October 13, 2020

PDF Download • “Taste and see the goodness of the Lord” (Responsorial Psalm)

Including a written tutorial on how to perform Chabanel Psalms correctly.

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Jeff Ostrowski · October 13, 2020

12 October 2020 • True Story

Before a Low Mass, the priest ascends the Altar to place the Chalice, check the altar Missal, and do other “preparing” tasks. The organist must be prepared to play here, and—depending upon the priest—this can be of surprising length! For certain priests, I can easily play all six verses of a hymn while he’s doing […]

Jeff Ostrowski · October 12, 2020

“Homily for the 20th Sunday after Pentecost” (EF) • Father Valentine Young, OFM

I think we can learn something from this pagan official.

Jeff Ostrowski · October 12, 2020

Catholic Architecture • “Modern vs. Ancient”

A picture is worth 1,000 words…

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Jeff Ostrowski · October 9, 2020

Photo • Archbishop Fulton J. Sheen

…praying the holy rosary with his office staff.

Jeff Ostrowski · October 8, 2020

PDF Download • Communion Antiphon (Mt 16:24) with Organ Accompaniment

To give you an idea how this sounds, I recorded the piece on my toy organ.

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Jeff Ostrowski · October 6, 2020

“Homily for the 19th Sunday after Pentecost” (EF) • Father Valentine Young, OFM

The word “grace” means a gift given to us by God. Sanctifying grace is first given to us when we are baptized.

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Corpus Christi Watershed

President’s Corner

    💲 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
    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

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

In the place of liturgy as the fruit of development came fabricated liturgy. We abandoned the organic, living process of growth and development over centuries, and replaced it—as in a manufacturing process—with a fabrication, a banal on-the-spot product.

— ‘Pope Benedict XVI, describing the postconciliar liturgical reforms’

Recent Posts

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

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