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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 10, 2016

Chief Reasons For Mass “Facing The People”

Are you being rude to people sitting in pews behind you?

Jeff Ostrowski · September 9, 2016

A Serious Question About Vatican II

Vatican II spoke of “useless repetitions” in the liturgy, and said these should be examined…

Jeff Ostrowski · September 6, 2016

Musical Resources • 17th Sunday after Pentecost

“We implore Thy majesty, O Lord, that the holy mysteries we are celebrating may free us of past sins and save us from future sins.”

Jeff Ostrowski · September 3, 2016

No Greater Advent Piece Exists

What Guerrero did with this Advent melody is mind-blowing!

Jeff Ostrowski · September 3, 2016

Musical Resources • 16th Sunday after Pentecost

“Let Thy grace, we beseech Thee, O Lord … make us to be continually zealous in doing good works.”

Jeff Ostrowski · August 30, 2016

Does Our Enlightened Age Still Need “Sacred” Music?

This short clip from “It’s a Wonderful Life” helps us understand…

Jeff Ostrowski · August 28, 2016

Beautiful Manuscript • Priest Offering Mass

I’d like to know more about this manuscript.

Jeff Ostrowski · August 27, 2016

Musical Resources • 15th Sunday after Pentecost

“Let Thy continual pity, O Lord, cleanse and fortify Thy Church…”

Jeff Ostrowski · August 25, 2016

“Simple Kyriale” for Dumb Organists Like Me!

Fr. Valentine used to say: “You can play 100 notes right, and miss just one—and people will criticize you for that wrong one!”

Jeff Ostrowski · August 25, 2016

The Eight Gregorian Psalm Tones (PDF)

I’m sick of looking for this chart online!

Jeff Ostrowski · August 24, 2016

Can You Hear The Difference?

Do you prefer polyphony recorded by just my voice, or mixed with “real” voices?

Jeff Ostrowski · August 23, 2016

“Ad Orientem” • Why I’m Rejoicing over Sloppy Errors in the Catholic Herald

His assertion that “smoking out enemies” is best done by appointing them to high positions in the Vatican is absurd.

Jeff Ostrowski · August 18, 2016

“Polyphony For Dummies”

A new video presentation with excellent audio samples.

Jeff Ostrowski · August 16, 2016

Breathtaking Images from Poland

A liturgical workshop took place in Licheń, Poland from 4-11 August 2016.

Jeff Ostrowski · August 15, 2016

Hymn for St. Thomas More & St. John Fisher

Fascinating verses by Msgr. Ronald Knox

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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

The local church should be conscious that church worship is not really the same as what we sing in a bar, or what we sing in a convention for youth.

— Francis Cardinal Arinze (2005)

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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