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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 · December 16, 2015

“Veni Veni Emmanuel” • Original Setting (Two Voices)

This famous Advent hymn was not written in the 1800s—it goes back at least to the 15th century.

Jeff Ostrowski · December 14, 2015

Why Don’t Serious Catholics Address This?

If you want to test the USCCB policy, try this experiment.

Jeff Ostrowski · December 10, 2015

Rehearsal Videos • Victoria’s “Ave Maria” (SATB)

Including six reasons why Tomás Luis de Victoria may be the true composer of this piece.

Jeff Ostrowski · December 7, 2015

Rehearsal Videos • “O Magnum Mysterium” (Victoria)

With a masterpiece like this, we must be careful not to rush in where angels fear to tread.

Jeff Ostrowski · December 7, 2015

Propers for Our Lady of Guadalupe (12 December)

Providing music for the Traditional Latin Mass is not nearly as hard as some believe.

Jeff Ostrowski · December 5, 2015

Musical Resources • Second Sunday of Advent (Extraordinary Form)

“Gather ye together His Saints to Him; who have set His covenant before sacrifices…”

Jeff Ostrowski · December 2, 2015

Introit For The Immaculate Conception (8 December)

“Gaudens Gaudebo” is not a short Introit.

Jeff Ostrowski · December 1, 2015

The Most Important Thing A Choirmaster Can Do

Sometimes it takes decades to appreciate the genius of this or that Gregorian chant.

Jeff Ostrowski · November 30, 2015

Changing The Good Friday Prayer For The Jews

“Christianity is the perfect development of the Jewish religion…” —Fr. Leslie Rumble

Jeff Ostrowski · November 29, 2015

Musical Resources • First Sunday of Advent (Extraordinary Form)

“Arise in thy strength, we beseech thee, O Lord, and come…”

Jeff Ostrowski · November 27, 2015

Clarity Regarding The Pius XII “Turkey” Indult

Whether this rumor is accurate makes no difference, because the rules for Friday abstinence were changed in the 1960s.

Jeff Ostrowski · November 24, 2015

Our Church Music Movement: How Are We Doing?

I never dreamed that so many people love this stuff…and are willing to fight for it!

Jeff Ostrowski · November 19, 2015

PDF Download • Hymnal by Fr. John Selner (1954)

Some of the old Catholic hymnals were dreadful, but this one is splendid.

Jeff Ostrowski · November 18, 2015

PDF Download • “Liber Brevior” (1954)

This special Solesmes book contains another version of the “Chants Abrégés.”

Jeff Ostrowski · November 17, 2015

Sacred Music & Babies

What’s our end game?

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Corpus Christi Watershed

President’s Corner

    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
    PDF Download • “Hymn for 2 Voices”
    Readers who click on this video will see that it starts with verses of the “Pange Lingua” hymn by Saint Thomas Aquinas (d. 1274) arranged for two voices. However, there’s a polyphonic refrain (“Tantum Ergo”) for three voices, taken from Kevin Allen’s Motecta Trium Vocum. If your choir is very small, this piece is for you! You can download the PDF score free of charge—and you can also utilize the rehearsal videos for each individual voice—by navigating yourself to #20323.
    —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

“One must pray to God not only with theologically precise formulas, but also in a beautiful and dignified way. The Christian community must make an examination of conscience so that the beauty of music and song will return increasingly to the liturgy.”

— Pope Saint John Paul II (26 February 2003)

Recent Posts

  • Dom Pothier • Photo from 1904
  • PDF Chart • “Plainsong Rhythm”
  • PDF • “3-Voice Motet” (Father De Laet)
  • PDF Download • “Hymn for 2 Voices”
  • (January 2026) • “Children Singing Plainsong”

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