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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

Articles

Andrew Leung · March 8, 2018

When Music Encounters Religion

A very special project at the University of St Andrews: the TheoArtistry project.

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!

Fr. David Friel · March 4, 2018

New Memorial of the Blessed Virgin Mary, Mother of the Church

Invoking Mater Ecclesiae in a new annual feast

Richard J. Clark · March 2, 2018

Blue Heron shines the light on Ockeghem—“The best composer you’ve never heard”

“He is in every way a composer of Bach’s stature and accomplishment both technically and expressively.” ~ Scott Metcalfe

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.

Veronica Brandt · February 24, 2018

Build your Music Theory Skills

How to Finally Acquire a Musical Education While Still in College or Anywhere Else (with apologies to James V Schall)

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

Andrew Leung · February 22, 2018

The Smoke of Satan

Blessed Pope Paul VI: “The smoke of Satan has entered the Church.”

Dr. Lucas Tappan · February 20, 2018

Building Your Choir Vocally

If more choirmasters were honest with themselves, they would probably acknowledge that no more than 25 to 40 percent of their singers are actually leaders within their choirs.

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

Fr. David Friel · February 18, 2018

St. Thomas More on the Reception of Holy Communion

“Let us not lose this time…for we can hardly tell whether we will ever get in to church again or not.” —St. Thomas More

Veronica Brandt · February 17, 2018

Towards a Standard Protocol for Frayed Ribbons

Adding ribbons sounds like a fine idea, until they fray and come adrift. Serious bookmakers take precautions to stop ribbons fraying, but even amateurs can learn from these tips.

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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

“How on earth in the [post-conciliar] liturgy for the dead should there be no more mention of sin and expiation? There’s a complete absence of imploring the Lord’s mercy. […] Although the texts were beautiful they were still lacking in the sense of sin and the sense of mercy. But we need this! And when my final hour comes, ask for mercy for me from the Lord, because I have such need of it!”

— Pope Saint Paul VI (3 June 1971)

Recent Posts

  • “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”
  • PDF Download • “Rarer Than a Blue Moon” — Side-by-Side English Translation (Pius XII Psalter)

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