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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

PDF Download

Jeff Ostrowski · April 15, 2026

“Gregorian Chant Isn’t a Platform for Your Personal Theories, Jeff” • (A Letter We Received)

“My desire, Leroy, is to answer your question in a rigorously straightforward way.” —Jeff Ostrowski

Corpus Christi Watershed · April 15, 2026

Request From Australia

“This is an exquisite setting and I know my singers would very much enjoy singing it.” —Mary

Jeff Ostrowski · April 14, 2026

PDF Download • “Anima Christi”

I received a request for this organ accompaniment…

Jeff Ostrowski · April 12, 2026

Simplified Accompaniment (Easter Hymn)

Last time I created a ‘simplified’ keyboard accompaniment it was downloaded more than 1,000 times within 24 hours.

Jeff Ostrowski · April 11, 2026

PDF Download • “Quasi Modo Sunday”

The official language of the Catholic Church is Latin (whereas Greek is our mother tongue).

Jeff Ostrowski · April 10, 2026

‘German’ Introductions for Hymns

German organ books have an enchanting habit…

Jeff Ostrowski · April 9, 2026

PDF Download • “Sprinkling Rite” + Psalm Verses

“From your wounded side, O Christ, a spring of water bursts forth, by which the squalor of the world is washed away…”

Jeff Ostrowski · April 8, 2026

Buckfast Abbey Weighs In

Dom John Stéphan was a Benedictine monk of Buckfast Abbey in South Devon, England.

Jeff Ostrowski · April 7, 2026

PDF Download • “Catholic Hymnal & Service Book” (632 Pages)

Includes an interesting harmonization for “Víctimae Pascháli Laudes.”

Jeff Ostrowski · April 6, 2026

PDF • “Liturgical Law” (467 Pages)

Dom Charles Augustine Bachofen was born in Switzerland but spent his career between the Benedictine monasteries at Conception (Missouri) and Mount Angel (Oregon).

Jeff Ostrowski · April 6, 2026

Responsorial Psalm Fauxbourdon?

What does this actually sound like?

Jeff Ostrowski · April 5, 2026

Music List • (Easter Sunday, 2026)

Readers have expressed interest in examining my “music list” for Easter Sunday 2026.

Jeff Ostrowski · April 1, 2026

PDF Download • “Sprinkling Rite”

At the last second, a few tones were changed in the antiphon.

Jeff Ostrowski · April 1, 2026

‘Sarum’ Good Friday?

Do you recognize it?

Jeff Ostrowski · March 31, 2026

Gregorian Chant • The “Correct” Way of Singing ?

Now I will explain what that means.

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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

“Abbat Pothier’s great accomplishment is having returned to the Catholic world—along with the traditional melody—the traditional way of performing it. The foundations laid by this providential man have been accepted by all those who practice Gregorian chant.”

— Dr. Peter Wagner (Commissionis Pontificiæ Gregorianæ Membrum)

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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