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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 · October 3, 2016

Cardinal Sarah’s Missing Paragraph…

This article includes live recordings from a conference (“Society for Catholic Liturgy”) in Los Angeles.

Jeff Ostrowski · September 29, 2016

Why Did Vatican II Happen?

These might not constitute the most perfect way to assist at Mass, but they’re very nice (German) hymn tunes!

Jeff Ostrowski · September 28, 2016

Twenty Minutes That Changed My Life Forever

I might be able to memorize that Chopin etude, but there’s no way I could memorize that 5-voice Bach fugue today.

Jeff Ostrowski · September 27, 2016

Where do you obtain your Psalms?

Download these Breviary files and keep them as our little secret!

Jeff Ostrowski · September 23, 2016

Propers for the Jesuit Martyrs of North America

“I shall remain here while there is a soul to save. My life is of no account if I can help you.” —Fr. Antoine Daniel

Jeff Ostrowski · September 22, 2016

SATB • “Come Holy Ghost, Who Ever One” — John Henry Cardinal Newman

This tune will get stuck in your head, and the words by Cardinal Newman are splendid.

Jeff Ostrowski · September 20, 2016

Catastrophic Results of USCCB “Interpretation”

“Peace, peace, peace on earth; peace to God’s people, all people on earth.”

Jeff Ostrowski · September 19, 2016

Musical Resources • 19th Sunday after Pentecost

“Let Thy healing power, O Lord, in mercy deliver us from our waywardness…”

Jeff Ostrowski · September 16, 2016

Musical Resources • 18th Sunday after Pentecost

“Let the operation of Thy mercy, we beseech Thee O Lord, direct our hearts…”

Jeff Ostrowski · September 14, 2016

Do You Recognize This Hymn Tune?

One man’s hymn sensitivities are another man’s…

Jeff Ostrowski · September 13, 2016

A Blemish On Hymnody Printing?

The word “Thy” is used in the Lord’s Prayer at every Mass, yet nobody struggles to understand it.

Jeff Ostrowski · September 12, 2016

Greatest Church Music Book Ever Written?

This volume by Paul Hume is supremely addictive!

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.”

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Corpus Christi Watershed

President’s Corner

    Music List • “5th Sunday of Easter” (Year A)
    Readers have expressed interest in seeing the ORDER OF MUSIC I created for the 5th Sunday of Easter Sunday—a.k.a. “Dominica V Paschae”—which is 3 May 2026. Please feel free to download it as a PDF file if such a thing interests you. The COMMUNION (“Tanto Témpore Vobíscum Sum”) is rather somber, with awesome fauxbourdon psalm verses. The ENTRANCE CHANT is bright and happy.
    —Jeff Ostrowski
    PDF Download • Communion for Sunday
    The COMMUNION ANTIPHON with fauxbourdon psalm verses for this coming Sunday (3 May 2026) is elegant and poignant. It’s such a shame it only comes every three years. This piece—along with all the musical scores for this coming Sunday, which is the 5th Sunday of Easter (Year A)—can be downloaded free of charge from the flourishing feasts website. By the way, how is it already 2026?
    —Jeff Ostrowski
    Season’s End Repertoire
    Looking at the REPERTOIRE SHEET until the end of the choral season, I see that I’ve fallen behind schedule. (The last three months have been extraordinarily busy.) As you know, I have been providing organ harmonies for all the ENTRANCE CHANTS—as well as rehearsal videos—and you can see I’m behind where I planned to be. Now I must make up lost ground. However, the choir picks up the ENTRANCE CHANT with ease, so I’m sure it will all work out. My ‘unofficial’ harmonizations are being posted each week 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

“Much of the reordering [in 1970] of the pieces of the Roman Gradual seems arbitrary and useless; nevertheless, with some exceptions, it does not affect the shape of the service, since like pieces are exchanged for like.”

— Dr. William Peter Mahrt

Recent Posts

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  • Music List • “5th Sunday of Easter” (Year A)
  • PDF Download • Communion for Sunday
  • “Translating the Bible” • Msgr. Ronald Knox (1953)
  • Season’s End Repertoire

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