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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 24, 2016

PDF Download • Rare Hymnal by Organist at the Birmingham Oratory (1913)

Download all 572 pages—thanks to Peter Meggison!

Jeff Ostrowski · October 23, 2016

Musical Resources • 23rd Sunday after Pentecost

“Remit, we beseech Thee, O Lord, the sins of Thy people…”

Jeff Ostrowski · October 19, 2016

Watershed: Established Ten Years Ago Today!

What keeps us going is our wonderful readers, whose kindness and witness inspire us.

Jeff Ostrowski · October 18, 2016

Palestrina • Jaw-Dropping “Kyrie” based on a Hymn

Two generous young ladies, currently in high school, helped me record this gorgeous Kyrie.

Jeff Ostrowski · October 17, 2016

“The Organist At Sung Mass” —Fr. Adrian Fortescue

Thoughts on “the hidden struggles” of a choirmaster.

Jeff Ostrowski · October 14, 2016

Complete Palestrina Edition • Now Online!

His Mass settings alone require 2,349 pages!

Jeff Ostrowski · October 10, 2016

Choirmaster’s Life: “A Life of Sacrifice”

Due to human nature, I believe most of us won’t reach our potential—unless we’re forced to do so!

Jeff Ostrowski · October 7, 2016

I Got Caught!

I hardly ever watch internet videos, but this one I could not resist.

Jeff Ostrowski · October 7, 2016

Musical Resources • 21st Sunday after Pentecost

“All things are in Thy will, O Lord, and there is none that can resist Thy will…”

Jeff Ostrowski · October 4, 2016

What Should A Church Look Like?

I have no idea which cathedral this is, but architects should take note!

Jeff Ostrowski · October 3, 2016

Cardinal Sarah’s Missing Paragraph…

This article includes live recordings from a conference (“Society for Catholic Liturgy”) in Los Angeles.

Jeff Ostrowski · September 29, 2016

Why Did Vatican II Happen?

These might not constitute the most perfect way to assist at Mass, but they’re very nice (German) hymn tunes!

Jeff Ostrowski · September 28, 2016

Twenty Minutes That Changed My Life Forever

I might be able to memorize that Chopin etude, but there’s no way I could memorize that 5-voice Bach fugue today.

Jeff Ostrowski · September 27, 2016

Where do you obtain your Psalms?

Download these Breviary files and keep them as our little secret!

Jeff Ostrowski · September 23, 2016

Propers for the Jesuit Martyrs of North America

“I shall remain here while there is a soul to save. My life is of no account if I can help you.” —Fr. Antoine Daniel

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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

    “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

“The production of this book was too far advanced for notice to be taken of the new translation of the Hebrew psalter into Latin by the professor of the Biblical Institute at Rome. The Holy Father’s permission to use it in the divine office when properly adapted for the purpose will prove a welcome boon.”

— Father Cuthbert Lattey (15 Nov. 1944)

Recent Posts

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  • “Reminder” — Month of Febr. (2026)
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  • Dom Pothier • Photo from 1904

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Corpus Christi Watershed is a 501(c)3 public charity dedicated to exploring and embodying as our calling the relationship of religion, culture, and the arts. This non-profit organization employs the creative media in service of theology, the Church, and Christian culture for the enrichment and enjoyment of the public.