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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 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

Jeff Ostrowski · August 12, 2016

Major Media Outlet Re: “Ad Orientem”

Corpus Christi Watershed is mentioned and cited!

Jeff Ostrowski · August 12, 2016

Musical Resources • 14th Sunday after Pentecost

“May Thy Sacraments, O Lord, ever purify and fortify us…”

Jeff Ostrowski · August 11, 2016

Hymn Tunes • What’s Up With Naming Them?

Until recently, most Catholic hymnals didn’t have a metrical index!

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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

“The first tasks of the new pope will be to restore normality, restore doctrinal clarity in faith and morals, restore a proper respect for the law and ensure that the first criterion for the nomination of bishops is acceptance of the apostolic tradition. Theological expertise and learning are an advantage, not a hinderance for all bishops and especially archbishops.”

— Cardinal Pell (2022) about the pope who will succeed Francis

Recent Posts

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

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