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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 · December 29, 2014

UPDATE * Latin Mass Will Remain In Hollywood

The Ancient Form of Mass will be offered indefinitely at St. Victor Church every Sunday at 7:00pm.

Jeff Ostrowski · December 28, 2014

Musical Resources • Sunday Within The Octave Of Christmas

We will NOT be singing “Rudolf The Red-Nosed Reindeer” for Communion!

Jeff Ostrowski · December 24, 2014

Musical Resources • Christmas Midnight Mass

We will NOT be singing “Frosty The Snowman” for Offertory!

Jeff Ostrowski · December 24, 2014

“Don’t Cross Out Christ On Christmas” — Wrong!

This myth shows great ignorance of ancient (Roman Catholic) manuscripts!

Jeff Ostrowski · December 23, 2014

PDF Download: Rossini “Parochial Hymnal” (1936)

Your Christmas present from Corpus Christi Watershed!

Jeff Ostrowski · December 22, 2014

Pope Paul VI • “Sacrificum Laudis” (15 Aug 1966)

The most progressive pope imaginable who’s given the Church a new direction? Are they aware of this letter?

Jeff Ostrowski · December 19, 2014

Musical Resources • 4th Sunday of Advent

Christmas draws nigh!

Jeff Ostrowski · December 18, 2014

PDF Download: Dominican Breviary From 1967

The book is so large, it must be downloaded in sections.

Jeff Ostrowski · December 18, 2014

Solemn High Christmas Midnight Mass • Hollywood

Oh, please help us spread this exciting news!

Jeff Ostrowski · December 17, 2014

PDF Download: Hymns of the Dominican Missal & Breviary • Fr. Aquinas Byrnes (1943)

Containing literal and poetic translations, author biographies, meter explanations, and much more!

Jeff Ostrowski · December 17, 2014

How Well Did Your Parents Know The Mass?

PDF Download: Order of Mass (Latin & English) printed in THE CROWN HYMNAL of 1911.

Jeff Ostrowski · December 15, 2014

“The Gloves Are Off” — Jonathan Gruber & The Traditional Mass

“The faith of many was quite infantile, I would say.” —Paul Inwood, talking about preconciliar Catholics

Jeff Ostrowski · December 13, 2014

“The Experience After The Council Was So Strong And In Some Cases Violent…” —Cardinal Burke

6 December 2014 interview with Raymond Leo Cardinal Burke by GloriaTV.

Jeff Ostrowski · December 13, 2014

Musical Resources • 3rd Sunday of Advent

Including “Creator Alme Siderum” with English Translation by Rev. Adrian Fortescue.

Jeff Ostrowski · December 11, 2014

What They Didn’t Tell You About Psalm Tone VIII

Even the “Liber Usualis” omits critical information about Tone VIII.

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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 council did not say Latin should be abolished. It said Latin should be used. […] While at Ecclesia Dei, I once received a letter from a chancery office in the United States, asking me if I didn’t know that the council had abolished Latin!”

— Cardinal Mayer, Prefect (1985–1988) of the Vatican’s Congregation for Divine Worship

Recent Posts

  • “Regina Caeli” • More Than You Wanted To Know
  • 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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