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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 29, 2018

Yesterday’s Solemn Mass Was An Inflection Point

Consider three (3) clerics who took part in this Solemn Mass at the National Shrine

Jeff Ostrowski · April 24, 2018

Directing A Choir: Are You Tough Enough?

Your sense of humor says it all…

Jeff Ostrowski · April 5, 2018

“ Dissonance? ” • Gregorian Accompaniment

Nothing could be further from the truth!

Jeff Ostrowski · April 2, 2018

I Was Wrong to Dread the “Pre-1955” Holy Week

Five (5) differences between the ancient rites of Holy Week (“Pre-1955”) and the Pius XII version.

Jeff Ostrowski · April 2, 2018

“Crotalus” • How Does It Sound?

Holy Thursday pew version from a pocket recorder.

Jeff Ostrowski · March 27, 2018

PDF Download • Organ Accompaniment for “Vexilla Regis” (Hymn) by Fr. Adrian Fortescue

When I saw this page, my opinion of Fortescue went down—but then I remembered…

Jeff Ostrowski · March 26, 2018

Musical Resources • Holy Thursday (FSSP, 2018)

“…Who didst establish the salvation of mankind on the tree of the Cross; that whence death came, thence also life might arise again, and that he, who overcame by the tree, by the tree also might be overcome…” —Preface

Jeff Ostrowski · March 19, 2018

Fighting With A Bishop • Good Idea?

“We are fully determined to restore Latin to its position of honor.” —Saint John XXIII (22 February 1962)

Jeff Ostrowski · March 8, 2018

4th Sunday of Lent (“Laetare Sunday”)

“Grant us, we beseech Thee, O merciful God, that we may treat with unfeigned veneration and ever receive with heartfelt faith Thy holy rites which we constantly celebrate…”

Jeff Ostrowski · March 6, 2018

PDF Download • Rare German Hymnal (879 pages)

Most German hymnals we’ve come across contain words only—but this one has harmonies!

Jeff Ostrowski · March 2, 2018

3rd Sunday of Lent (Extraordinary Form)

“Be merciful, O Lord, we beseech Thee, and free us from all sins and dangers…”

Jeff Ostrowski · February 28, 2018

Contemporary “Stabat Mater” (SATB) • by Gustaaf Nees (d. 1965)

You’ve never heard this arrangement before—perfect for Lent.

Jeff Ostrowski · February 25, 2018

“Tu Es Petrus” (Rec. 2017 Symposium)

No matter how many people imitate John Denver on the guitar in our churches, Palestrina and Victoria will always be loved and sought by serious Catholics.

Jeff Ostrowski · February 22, 2018

“First Run Through” • Guerrero’s Kyrie

“To put it simply, I was pierced by the beauty of the liturgy in a way I have never before experienced.” —2017 participant

Jeff Ostrowski · February 19, 2018

Rare Lenten Hymns You’ve Not Sung

“Our hymnbooks know nothing of such a treasure as this, and give us pages of poor sentiment in doggerel lines by some tenth-rate modern versifier.” —Fr. Fortescue

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Corpus Christi Watershed

President’s Corner

    “Reminder” — Month of April (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
    Simplified Accompaniment (Easter Hymn)
    Number 36 in the Brébeuf Hymnal is “At the Lamb’s high feast we sing,” an English translation for Ad Cenam Agni Próvidi (which was called “Ad Régias Agni Dapes” starting 1631). As of this morning, you can download a simplified keyboard accompaniment for it. Simply click here and scroll to the bottom. Many organists are forced to serve simultaneously as both CANTOR and ACCOMPANIST. In spite of what some claim, this can be difficult—which explains why choirmasters appreciate these simplified keyboard accompaniments. Sadly, many readers will click that link but forget to scroll to the bottom where the simplified PDF file is located.
    —Jeff Ostrowski
    PDF Download • “Quasi Modo Sunday”
    The Introit for “Quasi Modo Sunday” (12 April 2026) is particularly beautiful. The musical score can be downloaded as a PDF file, and so can the organ accompaniment. The official language of the Catholic Church is Latin (whereas Greek is our mother tongue). Vatican II said Gregorian Chant must be given “first place” under normal circumstances. As a result, some parishes will rightly sing the authentic version. On the other hand, because so many USA dioceses disobey the mandate of Vatican II, some musicians sing plainsong in the vernacular. I have attempted to simultaneously accompany myself on the pipe organ while singing the English version. Although very few take advantage of it, the complete Proprium Missae is posted at the flourishing feasts website.
    —Jeff Ostrowski

Quick Thoughts

    PDF Download • “Anima Christi”
    I received a request for an organ accompaniment I created way back in 2007 for the “Anima Christi” Gregorian Chant. You can download this PDF file which has the score in plainsong followed by a keyboard accompaniment. Many melodies have been paired with “Anima Christi” over the centuries, but this is—perhaps—the most common one.
    —Jeff Ostrowski
    PDF • “Liturgical Law” (467 Pages)
    On Good Friday during the middle ages, the pope privately recited THE ENTIRE PSALTER. If you don’t believe me, see for yourself by reading this passage by Dom Charles Augustine Bachofen (d. 1943). His famous book—called “Liturgical Law: A Handbook Of The Roman Liturgy”—was published by the Benjamin Herder Book Company, which was the American arm (operating out of St. Louis, Missouri) of one of the world’s most significant Catholic publishers. Dom Charles Augustine Bachofen was born in Switzerland but spent his career between the Benedictine monasteries at Conception (Missouri) and Mount Angel (Oregon). His 1931 masterpiece, Liturgical Law can be downloaded as a PDF file … 467 pages!
    —Jeff Ostrowski
    “Gregorian Chant Quiz” • 24 March 2026
    How well do you know your Gregorian hymns? Do you recognize the tune inserted into the bass line on this score? For many years, we sang the entire Mass in Gregorian chant—and I mean everything. As a result, it would be difficult to find a Gregorian hymn I don’t recognize instantly. Only decades later did I realize (with sadness) that this skill cannot be ‘monetized’… This particular melody is used for a very famous Gregorian hymn, printed in the LIBER USUALIS. Do you recognize it? Send me an email with the correct words, and I promise to tell everybody I meet about your prowess!
    —Jeff Ostrowski

Random Quote

“I never cared a tinker’s cuss what the Congregation may have decided about the order in which the acolyte should put out the candles after Vespers.”

— Dr. Adrian Fortescue (24 Nov. 1919)

Recent Posts

  • 2026 Sacred Music Pilgrimage (Washington DC) • With Richard J. Clark
  • “Reminder” — Month of April (2026)
  • “Gregorian Chant Isn’t a Platform for Your Personal Theories, Jeff” • (A Letter We Received)
  • Request From Australia
  • PDF Download • “Anima Christi”

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