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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 · March 9, 2022

PDF • “Hymn Suggestions For Each Sunday”

The conscientious choirmaster takes people where they are and then—carefully and prudently—leads them to something higher.

Jeff Ostrowski · March 8, 2022

Surprise! • Bas PDF from Paris

A generous person in Paris sent us the 1921 organ accompaniment to the Requiem Mass (“Missa Pro Defunctis”) harmonized by Julius Bas, who was associated with the Abbey of Solesmes. You can download the entire PDF file for free at the Lalande Library. I must say, what Bas does with Dies Irae sequence is fascinatingly […]

Jeff Ostrowski · March 8, 2022

“Like None Other!” • New Three-Voice Collection

I could not function as a choirmaster without this collection.

Jeff Ostrowski · March 5, 2022

“Communion Hymn For Lent” • (Rec. 3/4/2022)

I believe many choir members will stop coming back if the music is always the same.

Jeff Ostrowski · March 5, 2022

IMPORTANT • Stunning News From Rome!

In this meeting—and subsequent statement—Pope Francis made it clear that institutes like the FSSP are not affected by “Traditionis Custodes.”

Jeff Ostrowski · March 5, 2022

Marvelous News From Pope Francis!

Two members of the Priestly Fraternity of Saint Peter recently met with Pope Francis at the Vatican. (You can read the whole story.) The Pope insisted that the FSSP should be “preserved, protected, and encouraged.” Moreover, Pope Francis made it clear that institutes such as the Fraternity of Saint Peter are not affected by the […]

Jeff Ostrowski · March 2, 2022

Does Your Musical Program Have Balance?

What I’ve labeled “musical diversity” could also be thought of as “balance.”

Jeff Ostrowski · February 27, 2022

PDF Download • Quinquagesima Vespers

I created a booklet for my choir. (The congregation already has their own booklet). This booklet is for Quinquagesima Vespers, and you can download it if you desire. Print on “double sided” and the booklet will come out correctly. The polyphonic Magnificat is not included in that booklet, since the choir members have it in […]

Jeff Ostrowski · February 26, 2022

FEEDBACK • 25 February 2022

We love receiving mail from our readers. Here are two messages we received today from two different music directors in Canada: (1) “We are a small Schola in Yukon, Canada and love your practice videos repertoire.” (2) “Thank you so much for the indispensable work that you are doing to rebuild the musical life of […]

Jeff Ostrowski · February 26, 2022

PDF Download • Missa Philomena (Philippe Verdelot)

This music is from a much earlier period; and you can tell.

Jeff Ostrowski · February 26, 2022

“Common” Hymn Tunes? • Another Example

The first text is for the “pre-Lent” season…

Jeff Ostrowski · February 24, 2022

Cardinal Cupich’s Diocese • “What Mass Looks Like”

The “primary cross” for most young men has to do with temptations against the 6th Commandment.

Jeff Ostrowski · February 22, 2022

PDF Download • No More OCP “Breaking Bread”

This powerful response—by a Catholic priest—is without question one of the most fascinating things I’ve ever read.

Jeff Ostrowski · February 19, 2022

A Fugue that “explains” itself

One of my choir members sent me this Ontological Fugue. If you can get past the performance—which is terrible (perhaps on purpose)—you will learn an awful lot about fugues. In my opinion, whoever created that score is a genius! It would be awesome to know from a professional theorist, such as Charles Weaver, whether they […]

Jeff Ostrowski · February 18, 2022

Eucharistic Hymn • By a Jesuit Martyr Priest

English has words whose meanings directly contradict each other (such as “cleave” or “sanction”).

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Corpus Christi Watershed

President’s Corner

    PDF Download • “Organ Accompaniment”
    Over the past few years, I’ve been harmonizing all the vernacular plainsong Introit settings by the CHAUMONOT COMPOSERS GROUP. This coming Sunday—10 May 2026—is the 6th Sunday of Easter (Year A). The following declaration will probably smack of “blowing my own horn.” However, I’d rank this accompaniment as my best yet. In this rehearsal video, I attempt to sing it while simultaneously accompanying myself on the pipe organ. The musical score [for singers] as well as my organ accompaniment can be downloaded free of charge from the flourishing feasts website.
    —Jeff Ostrowski
    “Gregorian Chant Quiz” • 4 May 2026
    A few days ago, the CORPUS CHRISTI WATERSHED Facebook page posted this Gregorian Chant quiz regarding a rubric for the SEQUENCE for the feast of Corpus Christi: “Lauda Sion Salvatórem.” There is no audience more intelligent than ours—yet surprisingly nobody has been able to guess the rubric. Drop me an email with the right answer, and I’ll affirm your brilliance to everyone I encounter!
    —Jeff Ostrowski
    “Rare Photographs” • Hannibal Bugnini
    On 2 September 2025, we included in this article extremely rare photographs of Archbishop Hannibal Bugnini taken in Iran circa 1979. Bugnini had initially been banished by the pope to Uruguay, but he refused to obey. [This is interesting, since Bugnini relied upon ‘blind obedience’ when it came to modifications of the ancient liturgy.] After he refused to obey the order from the pope, Hannibal Bugnini was banished to Iran. You can also watch a short video of Hannibal Bugnini in Iran, dated 10 November 1979. That’s about a week after the USA embassy hostage crisis began in Tehran, and Pope Saint John Paul II had sent the leader of the Iranian Revolution a special letter.
    —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

When Christ gave the bread, he did not say, “This is the symbol of my body,” but, “This is my body.” In the same way, when he gave the cup of his blood he did not say, “This is the symbol of my blood,” but, “This is my blood.”

— Theodore, Bishop of Mopsuestia, writing in the 5th Century

Recent Posts

  • PDF Download • “Organ Accompaniment”
  • “Gregorian Chant Quiz” • 4 May 2026
  • “Rare Photographs” • Hannibal Bugnini
  • “Regina Caeli” • More Than You Wanted To Know
  • Music List • “5th Sunday of Easter” (Year A)

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