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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 · July 8, 2015

Beware Of Microphones!

My mother was present during that Mass and recorded some brief snippets on her iPhone.

Jeff Ostrowski · July 7, 2015

UGLY • Just Plain, Old-Fashioned Ugly

Have you noticed that contemporary music was not forced upon congregations the same way contemporary architecture was?

Jeff Ostrowski · July 7, 2015

Short, Fresh, & Beautiful • SATB “Ave Maris Stella”

This piece by Fr. Antonin Lhoumeau will knock your socks off!

Jeff Ostrowski · July 6, 2015

The Beauty Of Ancient Catholic Manuscripts

Medieval manuscripts were normally created by (at least) two monks: one drew, one wrote.

Jeff Ostrowski · July 4, 2015

Musical Resources • 6th Sunday after Pentecost (Extraordinary Form)

The organist will play softly at the Offertory.

Jeff Ostrowski · July 4, 2015

Clarence Thomas: “I waited 25 years to return to the Church”

“Older people have an obligation not to spew their cynicism on our youth.” —Justice Thomas

Jeff Ostrowski · July 2, 2015

Annibale Bugnini’s Commentary (June 1967)

“The faithful everywhere have responded generously, and have greeted the new liturgy with great joy.” —Archbishop Bugnini (1967)

Jeff Ostrowski · July 1, 2015

Only Priests Can Save Catholic Music

Including thirteen (13) complete collections of Mass Propers…with audio examples!

Jeff Ostrowski · June 28, 2015

Loading Choir Binders In Los Angeles

I average one binder per second.

Jeff Ostrowski · June 26, 2015

Musical Resources • 5th Sunday after Pentecost (Extraordinary Form)

The organist will play softly at the Offertory.

Jeff Ostrowski · June 24, 2015

PDF Download • “Gloria In Excelsis” With 3-Voice Polyphony By Cristóbal De Morales

Could this have something to do with how each line comes through “cleanly” in 3-part music?

Jeff Ostrowski · June 24, 2015

Clearest Explanation Ever! —Bishop Gracida On Divorce & Remarriage For Catholics

“It is better to speak of a Declaration of Nullity rather than an Annulment…” —Most Rev. Gracida (1994)

Jeff Ostrowski · June 22, 2015

EWTN Classic • “Theology of Worship” with Fr. Robert Skeris (1998)

Mother Angelica sat down for a wonderful interview with a famous Theologian.

Jeff Ostrowski · June 22, 2015

Richard Rice • SATB Kyrie from Mass VIII

A luxuriant choral setting of the Kyrie from “Mass of the Angels”

Jeff Ostrowski · June 21, 2015

Musical Resources • 4th Sunday after Pentecost (Extraordinary Form)

The organist will play softly at the Offertory.

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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

“Pope Francis breaks Catholic traditions whenever he wants because he is free from disordered attachments. Our Church has indeed entered a new phase: with the advent of this first Jesuit pope, it is openly ruled by an individual rather than by the authority of Scripture alone or even its own dictates of tradition plus Scripture.”

— Fr. Thomas Rosica (31 July 2018)

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.