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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 · September 23, 2015

Interesting Video About The Latin Mass (Massachusetts)

I believe Fr. Robert Fromageot was professor of Gregorian chant at the FSSP seminary.

Jeff Ostrowski · September 22, 2015

A Serious Problem That Needs To Be Addressed

The accusation by this lady really hurt me; but I’m not sure why…

Jeff Ostrowski · September 22, 2015

Transposed Mode • This Sunday’s Communion

One could also use a Mode VII psalm tone to “solve” the problem … but that just sounds wrong.

Jeff Ostrowski · September 19, 2015

Musical Resources • 17th Sunday after Pentecost (Extraordinary Form)

“Very humbly, O Lord, we implore of thy majesty, that the holy mysteries we are celebrating … save us from transgressing in the time to come …”

Jeff Ostrowski · September 19, 2015

“Agnus Dei” For Three Voices • Guillaume Dufay

…including a digression on why choirs hate Solfège.

Jeff Ostrowski · September 16, 2015

“Live” Recording Of Polyphonic Kyrie VIII

Last Sunday we sang a beautiful composition by Richard Rice.

Jeff Ostrowski · September 16, 2015

“The songs and hymns presently in use need to be reconsidered.”

“…it is important to avoid musical forms which, because of their profane use, are not conducive to prayer.”

Jeff Ostrowski · September 14, 2015

Fr. Jonathan Morris, Pit Bull Attack, & More

What you didn’t know about Fr. Jonathan Morris…

Jeff Ostrowski · September 10, 2015

Musical Resources • 16th Sunday after Pentecost (Extraordinary Form)

“May thy grace … cause us to be zealous at all times in the doing of good works.”

Jeff Ostrowski · September 8, 2015

Video Demonstration • “Do Choral Vowels Matter?”

Can you see the difference? Can you hear the difference?

Jeff Ostrowski · September 7, 2015

A New Edition Of The 1962 Missal?

Download these Propers for Saint Pio of Pietrelcina—according to the 1962 Missale Romanum!

Jeff Ostrowski · September 5, 2015

“Wearing The Cassock” • A Bishop Weighs In

“I think that all of us clerics should rethink our choice of clothing…” —Bishop René H. Gracida

Jeff Ostrowski · September 3, 2015

Rehearsal Videos • “Jesu Dulcis Memoria”

I first sang this marvelous piece as a freshman in college, under Dr. James F. Daugherty.

Jeff Ostrowski · September 2, 2015

Musical Resources • 15th Sunday after Pentecost (Extraordinary Form)

“May thine abiding loving-kindness, O Lord, cleanse and fortify thy Church…”

Jeff Ostrowski · August 29, 2015

The Ordinary Form’s Incredible Freedom

Here’s a chart with rubrics from the 1974 “Graduale” translated into English.

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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

“Abbat Pothier’s great accomplishment is having returned to the Catholic world—along with the traditional melody—the traditional way of performing it. The foundations laid by this providential man have been accepted by all those who practice Gregorian chant.”

— Dr. Peter Wagner (Commissionis Pontificiæ Gregorianæ Membrum)

Recent Posts

  • “Reminder” — Month of Febr. (2026)
  • Seminary Music Directors Gather in Houston
  • 💲 5.00 💵
  • Dom Pothier • Photo from 1904
  • PDF Chart • “Plainsong Rhythm”

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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.