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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 · October 19, 2016

Watershed: Established Ten Years Ago Today!

What keeps us going is our wonderful readers, whose kindness and witness inspire us.

Jeff Ostrowski · October 18, 2016

Palestrina • Jaw-Dropping “Kyrie” based on a Hymn

Two generous young ladies, currently in high school, helped me record this gorgeous Kyrie.

Jeff Ostrowski · October 17, 2016

“The Organist At Sung Mass” —Fr. Adrian Fortescue

Thoughts on “the hidden struggles” of a choirmaster.

Jeff Ostrowski · October 14, 2016

Complete Palestrina Edition • Now Online!

His Mass settings alone require 2,349 pages!

Jeff Ostrowski · October 10, 2016

Choirmaster’s Life: “A Life of Sacrifice”

Due to human nature, I believe most of us won’t reach our potential—unless we’re forced to do so!

Jeff Ostrowski · October 7, 2016

I Got Caught!

I hardly ever watch internet videos, but this one I could not resist.

Jeff Ostrowski · October 7, 2016

Musical Resources • 21st Sunday after Pentecost

“All things are in Thy will, O Lord, and there is none that can resist Thy will…”

Jeff Ostrowski · October 4, 2016

What Should A Church Look Like?

I have no idea which cathedral this is, but architects should take note!

Jeff Ostrowski · October 3, 2016

Cardinal Sarah’s Missing Paragraph…

This article includes live recordings from a conference (“Society for Catholic Liturgy”) in Los Angeles.

Jeff Ostrowski · September 29, 2016

Why Did Vatican II Happen?

These might not constitute the most perfect way to assist at Mass, but they’re very nice (German) hymn tunes!

Jeff Ostrowski · September 28, 2016

Twenty Minutes That Changed My Life Forever

I might be able to memorize that Chopin etude, but there’s no way I could memorize that 5-voice Bach fugue today.

Jeff Ostrowski · September 27, 2016

Where do you obtain your Psalms?

Download these Breviary files and keep them as our little secret!

Jeff Ostrowski · September 23, 2016

Propers for the Jesuit Martyrs of North America

“I shall remain here while there is a soul to save. My life is of no account if I can help you.” —Fr. Antoine Daniel

Jeff Ostrowski · September 22, 2016

SATB • “Come Holy Ghost, Who Ever One” — John Henry Cardinal Newman

This tune will get stuck in your head, and the words by Cardinal Newman are splendid.

Jeff Ostrowski · September 20, 2016

Catastrophic Results of USCCB “Interpretation”

“Peace, peace, peace on earth; peace to God’s people, all people on earth.”

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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

“In condemning us, you condemn all your own ancestors—all the ancient priests, bishops and kings—all that was once the glory of England, the island of saints and the most devoted child of the See of Peter. For what have we taught, however you may qualify it with the odious name of treason, that they did not uniformly teach?”

— Father Edmund Campion (to the Anglicans about to murder him)

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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