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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 · April 24, 2016

Our Lady’s Royal Ancestry • Gregorian Chant

“Richer than I you can never be—I had a Mother who read to me.”

Jeff Ostrowski · April 23, 2016

Dazzling Canon • “Adoremus in Aeternum”

John Paul II: “For compositions of liturgical music, I make my own the general rule of St. Pius X…”

Jeff Ostrowski · April 22, 2016

Shocking Parallels By Guerrero

I’ve seen similar passages by Orlando Lassus.

Jeff Ostrowski · April 20, 2016

Benedictus & Hosanna • “Missa Beata Mater”

My friend was in charge of picking music for papal Masses under Pope St. John Paul II.

Jeff Ostrowski · April 19, 2016

“Catholic Choirmaster” • Fascinating Photo Taken 29 August 1964

CMAA was formed the same year “Inter Oecumenici” was issued by the Vatican.

Jeff Ostrowski · April 18, 2016

“No Time For Cowardice” • A Letter To Liturgy Columnists

Too many columnists focus endlessly on minutiae while leaving untouched a crucial issue.

Jeff Ostrowski · April 18, 2016

In Memoriam • Sister Clare Crockett

She passed away when the community’s house collapsed during the earthquake that hit the Ecuadorian coast on 16 April 2016.

Jeff Ostrowski · April 16, 2016

Musical Resources • Third Sunday after Easter (Extraordinary Form)

“O God, Who dost show the light of Thy truth to them that go astray…”

Jeff Ostrowski · April 16, 2016

Feeding Our Children Liturgical “Garbage”

Some of you know I’ve been extremely ill for more than two years…

Jeff Ostrowski · April 15, 2016

Picture • Pope Pius XII in St. Peter’s (Low Mass)

With a lovely chasuble!

Jeff Ostrowski · April 11, 2016

Sacrament of Confirmation (EF) • “Fully Notated Confirmation Prayers”

You Will Want To Download These! • Written-out (“notated”) sheets for the Rite of Confirmation in the Extraordinary Form.

Jeff Ostrowski · April 10, 2016

Ven. Pope Pius XII Singing The Preface

We normally sing the way we heard the priest singing as a child…

Jeff Ostrowski · April 8, 2016

“Tantum Ergo” • Eleven (11) Harmonizations

Do you know what the “Tantum Ergo” means, word for word?

Jeff Ostrowski · April 7, 2016

“Et Cum Spiritu Tuo” in the 1961 Fulton Sheen Missal

What Fr. Philip Caraman does may surprise you…

Jeff Ostrowski · April 6, 2016

“I confess that I was a liturgical nut” says Bishop consecrated by Pope Paul VI

“The liturgy is not only worship of God; it is the way we are formed in our faith.” —Bishop Gracida

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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

“As often as possible they gathered together the children of the village and sat them down in the cabin. Father Brébeuf would put on a surplice and biretta and chant the Our Father, which Father Daniel had translated into Huron rhymes, and the children would chant it after him. Next, he taught them the sign of the cross, the Hail Mary, the Apostles’ Creed, and the Commandments.”

— Biography of St. Jean de Brébeuf

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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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.