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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

Richard J. Clark · June 24, 2016

New Organ Work • Madonna & Child

It took me—the composer—to realize this is really a work about mother and child.

Andrew Leung · June 23, 2016

Made in China

Gregorian Chant pew cards in Hong Kong.

Jeff Ostrowski · June 23, 2016

“I will fear no evils, for thou art with me.”

St. John Vianney was once overheard speaking directly to the Lord.

Fr. David Friel · June 23, 2016

Colloquium 2016 • Day 3

The Organic Development of the Liturgy and the New Music Breakouts

Fr. David Friel · June 22, 2016

Colloquium 2016 • Day 2

Explanatory Images from Wilko Brouwers

Jeff Ostrowski · June 22, 2016

Purchase Hard Copies of the Goupil Gradual

Eight reasons why every choirmaster needs this new resource.

Fr. David Friel · June 21, 2016

Colloquium 2016 • Day 1

A concert of early music by the ensemble “Pro-Arte Saint Louis”

Jeff Ostrowski · June 21, 2016

First Instance of “Alius Cantus Aptus”

“The current rubrics of the missal … specify the moments when the celebrant must turn toward the people.” —Cardinal Sarah, 23 May 2016

Jeff Ostrowski · June 20, 2016

“Vidimus Stellam Ejus In Oriente”

Who could deny the text painting here?

Jeff Ostrowski · June 19, 2016

Musical Resources • 5th Sunday after Pentecost

“O God, Who hast prepared good things unseen for them that love Thee…”

Jeff Ostrowski · June 18, 2016

Does the Mass Demand a Certain Level of Dignity?

I started asking myself how anyone could argue against something like this. After all, isn’t it good to share joy?

Andrew Leung · June 16, 2016

A Guardian of the Sacred Tradition in the South — Part 2

Why is the Basilica community so lively and why are they growing so much?

Jeff Ostrowski · June 15, 2016

Essential Resources • Psalm Tones for Mass Propers

“The singing of the Communion Antiphon alone, which sufficed at sung Mass when Holy Communion was not given, is insufficient under the new conditions…” —Solesmes (1957)

Dr. Lucas Tappan · June 14, 2016

The Theology of the Organ

Let’s put the organ back on the pedestal it rightfully deserves.

Jeff Ostrowski · June 14, 2016

New Gloria Mixing Plainsong w/ Polyphony

… composed by a Franciscan monk!

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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

“The chapter secretary is authorized to write a letter beseeching a royal pardon for Caspar de Cuevas, cathedral sackbut player, who is imprisoned on a murder charge.” [From “The Life of Father Francisco Guerrero.”]

— Sevilla: Chapter Resolution (23 March 1566)

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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