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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 · August 13, 2021

“Part 3 of 3” • Guerrero Kyrie for Our Lady

This is—perhaps—the most phenomenally gorgeous piece ever written.

Jeff Ostrowski · August 12, 2021

PDF Download • Hymn for the Assumption • (Soprano, Alto, Tenor, Bass)

This hymn was originally for the Assumption, but now can be used on various Marian feasts.

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Jeff Ostrowski · August 11, 2021

“Feast of All Saints” • Do You Know This Hymn?

All Saints—November 1st—will be here before you know it!

Jeff Ostrowski · August 9, 2021

PDF Download • “A Very Sloppy Accompaniment”

What I played from yesterday…

Jeff Ostrowski · August 8, 2021

8 August 2021 • “More on the Moræ”

If you look at the 1961 Solesmes Gradual for the 11th Sunday after Pentecost, you will see that somebody in the 1960s was trying to figure out the “melismatic moræ vocis” (a.k.a. “Vaticana white notes”) which we have spoken of so frequently on this blog.

Jeff Ostrowski · August 7, 2021

Hymn For The Transfiguration (6 August) • “Recorded During Choir Rehearsal”

An English translation by Robert Campbell of Skerrington (d. 1868), who was a convert to the Catholic Faith.

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Jeff Ostrowski · August 6, 2021

PDF Download • Alleluia (SATB) by Morales for “Ordinary Form” + “Extraordinary Form”

This piece works well in the “OF” (Ordinary Form) and also the “EF” (Extraordinary Form).

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Jeff Ostrowski · August 5, 2021

“Talking To Dead Composers” • Part 2

Including a live recording (without organ) of “Alleluia, Sing To Jesus” by a volunteer choir.

Jeff Ostrowski · August 4, 2021

It Finally Happened.

Father Valentine used to say: “The cemeteries are full of people who thought they were indispensable.”

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Jeff Ostrowski · August 2, 2021

“What is Vespers?” • Live Rec. + 100% Scrolling Score

After more than a year of Vespers having been forbidden (due to Covid-19) we’re back!

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Jeff Ostrowski · August 1, 2021

“Homily: 10th Sunday after Pentecost” (EF) • Father Valentine Young, OFM

Unfortunately, this virtue often seems to be lacking in people who have high positions of authority.

Jeff Ostrowski · July 31, 2021

(29 Pages) • Free Organ Accompaniment Book — Draft copy

The following is what I will use to accompany the congregation tomorrow.

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Jeff Ostrowski · July 31, 2021

PDF Download • Vespers Booklet for This Sunday (draft)

Starting pitches are included!

Jeff Ostrowski · July 28, 2021

SATB Hymns • “Consors Paterni Luminis” (Translated to English)

Brave choir director posts *live* recording by a volunteer choir!

Jeff Ostrowski · July 28, 2021

Father Adrian Fortescue on the “Agnus Dei”

Speaking about the AGNUS DEI, Father Fortescue wrote: “Agnus as a vocative is curious, evidently in order to reproduce the original text (John 1:29) exactly.” [Altera die vidit Joannes Jesum venientem ad se, et ait: Ecce agnus Dei, ecce qui tollit peccatum mundi.] Father Fortescue, as usual, is correct; but in some medieval manuscripts you […]

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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

Pope Gelasius in his 9th Letter to the Bishops of Lucania condemned the evil practice which had been introduced of women serving the priest at the celebration of Mass. Since this abuse had spread to the Greeks, Innocent IV strictly forbade it in his letter to the Bishop of Tusculum: “Women should not dare to serve at the altar; they should be altogether refused this ministry.” We too have forbidden this practice in the same words in Our oft-repeated constitution “Etsi Pastoralis” (§6, #21)

— Pope Benedict XIV • Encyclical “Allatae Sunt” (26 July 1755)

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