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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 · June 17, 2015

SATB “Agnus Dei” by Verdelot with Rehearsal Videos

Who wouldn’t welcome a brief-but-beautiful piece like this?

Jeff Ostrowski · June 16, 2015

Top Six Liturgical Quotes By Robert Cardinal Sarah

Is the “Reform of the Reform” dead? Bishop Serratelli and many others disagree!

Jeff Ostrowski · June 12, 2015

Musical Resources • External Solemnity of the Sacred Heart (1962 Missal)

Some EF communities will celebrate the “External Solemnity” of the Most Sacred Heart on Sunday.

Jeff Ostrowski · June 10, 2015

Solesmes Monastery & Latin Accents

I suspect that in a long melisma it’s hard to know “where you are”…

Jeff Ostrowski · June 10, 2015

Video • “Three Approaches To A Catholic Hymn”

Including a special version of the “Tantum Ergo” by Fr. Adrian Fortescue.

Jeff Ostrowski · June 9, 2015

Video • Disrespect For God’s House

Is Consecration by the words of Institution “de fide” ??

Jeff Ostrowski · June 9, 2015

PDF Download • “A Manual For Church Musicians” (1964) — 130 pages

A generous reader sent me copies of this extremely rare book.

Jeff Ostrowski · June 8, 2015

USCCB: “Revised Grail Psalter” Will Be Revised Again

“I cannot understand why a private family can be made worldwide agent for the official prayers of the Church.” —Dr. Jerry Galipeau

Jeff Ostrowski · June 7, 2015

Musical Resources • 2nd Sunday after Pentecost (Extraordinary Form)

Some EF communities will celebrate the “External Solemnity” of Corpus Christi today.

Jeff Ostrowski · June 7, 2015

Message From A “Traditional” Priest

“Believe me we had some long offices back in those days.”

Jeff Ostrowski · June 6, 2015

On This Day . . . In 1944

Soldiers attending Mass during World War II.

Jeff Ostrowski · June 5, 2015

Eerie Silence After Cardinal Sarah’s Testimony

Cardinal Sarah has committed an “unforgivable sin” in the opinion of progressive liturgists.

Jeff Ostrowski · June 4, 2015

Order of Worship • “Mass VIII” — High Resolution Images

It seems many wish to include Mass VIII in their program booklets.

Jeff Ostrowski · June 3, 2015

Finding A Liturgical Context

A very important article recently appeared in the Adoremus Bulletin.

Jeff Ostrowski · June 2, 2015

“Lauda Sion” • Rehearsal Video With Translation By Saint Robert Southwell, Jesuit Martyr

Many of the big publishing companies skip the Corpus Christi Sequence—they literally leave it blank.

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Corpus Christi Watershed

President’s Corner

    “Reminder” — Month of April (2026)
    On a daily basis, I speak to people who don’t realize we publish a free newsletter (although they’ve followed our blog for years). We have no endowment, no major donors, no savings, and refuse to run annoying ads. As a result, our mailing list is crucial to our survival. It couldn’t be easier to subscribe! Just scroll to the bottom of any blog article and enter your email address.
    —Jeff Ostrowski
    Simplified Accompaniment (Easter Hymn)
    Number 36 in the Brébeuf Hymnal is “At the Lamb’s high feast we sing,” an English translation for Ad Cenam Agni Próvidi (which was called “Ad Régias Agni Dapes” starting 1631). As of this morning, you can download a simplified keyboard accompaniment for it. Simply click here and scroll to the bottom. Many organists are forced to serve simultaneously as both CANTOR and ACCOMPANIST. In spite of what some claim, this can be difficult—which explains why choirmasters appreciate these simplified keyboard accompaniments. Sadly, many readers will click that link but forget to scroll to the bottom where the simplified PDF file is located.
    —Jeff Ostrowski
    PDF Download • “Quasi Modo Sunday”
    The Introit for “Quasi Modo Sunday” (12 April 2026) is particularly beautiful. The musical score can be downloaded as a PDF file, and so can the organ accompaniment. The official language of the Catholic Church is Latin (whereas Greek is our mother tongue). Vatican II said Gregorian Chant must be given “first place” under normal circumstances. As a result, some parishes will rightly sing the authentic version. On the other hand, because so many USA dioceses disobey the mandate of Vatican II, some musicians sing plainsong in the vernacular. I have attempted to simultaneously accompany myself on the pipe organ while singing the English version. Although very few take advantage of it, the complete Proprium Missae is posted 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

[Let there be:] “The Latin, the whole Latin, and nothing but the Latin.”

— Cardinal McIntyre (one of the Vatican II fathers)

Recent Posts

  • 2026 Sacred Music Pilgrimage (Washington DC) • With Richard J. Clark
  • “Reminder” — Month of April (2026)
  • “Gregorian Chant Isn’t a Platform for Your Personal Theories, Jeff” • (A Letter We Received)
  • Request From Australia
  • PDF Download • “Anima Christi”

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