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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 · September 12, 2024

Music List • (24th Sund. Ordinary Time)

Readers have expressed interest in looking over the “music list” I have prepared for this coming Sunday.

Jeff Ostrowski · September 11, 2024

Musical Setting • “Confíteor Déo Omnipoténti”

The participants went nuts over this musical setting. They just couldn’t get enough of it!

Jeff Ostrowski · September 10, 2024

PDF Download • “Entrance Chant” for the 24th Sunday in Ordinary Time (Plainchant in English)

Today I discuss a myth about accompanying plainsong on the pipe organ.

Jeff Ostrowski · September 7, 2024

Music List • (23rd Sund. Ordinary Time)

This coming Sunday (8 September 2024) is the 23rd Sunday in Ordinary Time, Year B. Some have expressed interest in seeing my “ORDER OF MUSIC.” If such a thing be appealing to you, it can be downloaded as a PDF file.

Jeff Ostrowski · September 6, 2024

Communion • (23rd Sunday in Ordinary Time)

This coming Sunday (23rd Sunday in Ordinary Time) we’re singing the Communion antiphon in English as adapted by the SISTERS OF THE MOST PRECIOUS BLOOD (O’Fallon, Missouri). Their enormous body of work is usually referred to as The O’Fallon Propers. Click here to download this Communion as a PDF file. (For the record, I couldn’t […]

Jeff Ostrowski · September 6, 2024

“Spanish Entrance Hymn” • (You Might Enjoy This)

Javier R. wrote to us: “One thing that caught my eye—and which I’ve been wrestling with—is how to fit Hymns with Antiphons, especially during the entrance procession.”

Jeff Ostrowski · September 5, 2024

“Entrance Chant” • For Sunday (8-Sep-2024)

Coming up fast is Sunday, 8 September 2024, which is the 23rd Sunday in Ordinary Time. Here’s the PDF file for the ENTRANCE ANTIPHON—in Gregorian notation on five lines—which we’ll be singing. You can also download this organ accompaniment which corresponds to that file. Plainchant scholars will be interested in the ancient version it mimics […]

Jeff Ostrowski · August 31, 2024

Musical Lineup • (22nd Sund. Ordinary Time)

Jeff’s musical lineup for Sunday, 1 September 2024.

Jeff Ostrowski · August 30, 2024

PDF • “Lamb of God” Harmonization

Harmonized—and carefully notated—in Spanish, English, and Latin.

Jeff Ostrowski · August 30, 2024

Repository • “Spanish Order of Music” (Sainte Marie)

I’ve been creating these for our Spanish Masses. They aren’t perfect—but I’ve also seen worse.

Jeff Ostrowski · August 30, 2024

Leaked Document! • Comparison Chart—New Responsorial Psalms (“Abbey Psalms & Canticles”)

The NAB tried to use “overly casual” language—and the results are often an abomination.

Jeff Ostrowski · August 29, 2024

“3-Voice Arrangement” (SAB) • Psalm 26

Fabulous rehearsal videos have been created for you.

Jeff Ostrowski · August 28, 2024

PDF Download • Seasonal (“Ad Libitum”) Gospel Acclamations for Sundays and Weekdays

The various options given here by the official 1970 Missal can be used during the week (or on any Sunday).

Jeff Ostrowski · August 28, 2024

Meet Kevin Allen In Person!

If you ever wanted to spend a day with Jeff Ostrowski and Kevin Allen, next Tuesday (3-Sept-2024) is your chance! Learn more by clicking here.

Jeff Ostrowski · August 28, 2024

MONTH OF SEPTEMBER — “Reminder”

Each day I speak to folks who have followed our blog for years but (somehow) don’t realize we publish a free newsletter. Please subscribe to it! Simply scroll to the bottom of any blog article and enter your email address. We have no endowment, no major donors, no savings, and refuse to run annoyong ads. Therefore, […]

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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

“To get people together once a week without an objective is deadly.”

— Dr. Roger Wagner (19 December 1960)

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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