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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 · May 16, 2019

How Do You Mark Starting Pitches?

Some might ask: “Why not just write the name of the note?”

Jeff Ostrowski · May 8, 2019

1941 Mass (Chicago) mixed with 2017 Mass (FSSP)

I can’t remember if I ever released this “comparison” video…

Jeff Ostrowski · May 6, 2019

“Common” Hymn Melodies • What are they?

Choirmasters and organists understand how crucial flexibility is.

Jeff Ostrowski · May 2, 2019

PDF Download • Complete Kyriale on Modern Staves!

If you can read treble clef, you can read this edition … a brilliant idea!

Jeff Ostrowski · April 22, 2019

Josef Hofmann: “King of Pianists”

This excerpt from a 1980 radio interview with Abe Chasins proves I’m not crazy…

Jeff Ostrowski · April 20, 2019

PDF Download • “Cheat Sheet” for Easter Vigil

Releasing this is probably a bad idea…too late!

Jeff Ostrowski · April 19, 2019

PDF Download • Organ Interludes for Manuals!

I will most definitely be playing these pieces—based on hymn tunes—by Georg Philipp Telemann!

Jeff Ostrowski · April 12, 2019

Musical Program for Covid-19

Saint Vitus • MATT GONZALEZ WEDDING • Saturday, 1 August 2020…bride walks at Noon! ——Call time for singers is 10:00am ENTRANCE Organist will play INTROIT • “Deus Israël conjungat” Sung by Men from Goupil-Chant Search the René Goupil website for “pro sponsis” KYRIE #81668 — Palestrina “Fons Bonitatis” part 1 #81249 — Palestrina “Fons Bonitatis” […]

Jeff Ostrowski · April 12, 2019

The Amazing Uy Family Singers!

Not a piece you expected to hear today!

Jeff Ostrowski · April 10, 2019

(captured by iPhone) • Rehearsing for the Symposium

Do me a huge favor…

Jeff Ostrowski · April 9, 2019

Brébeuf Harmony Edition • “Splendid Beyond Words”

Folks, there’s just one word for this: WOW.

Jeff Ostrowski · April 8, 2019

PDF Download • Spectacular “Tenebrae” Booklet

Mr. Albert Bloomfield has done us a breathtaking favor.

Jeff Ostrowski · April 6, 2019

St. Michael the Archangel Prayer…in Gregorian Chant!

From a rare book of Franciscan chants (1902)

Follow the Discussion on Facebook

Jeff Ostrowski · April 4, 2019

PDF Download • Mystery Kyriale (100 Pages)

Nobody knows the author or date of publication.

Jeff Ostrowski · March 19, 2019

A Short Piece We’re Singing For Lent

A few weeks ago, I had the opportunity to sit down with one of the smartest Catholic priests alive.

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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

I want to say one thing to you strongly, especially today: virginity for the Kingdom of God is not a “no,” it is a “yes!”

— Pope Francis (10/4/2013)

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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