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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 · January 8, 2024

Organ? Or SATB unaccompanied?

Pipe organ (with voices) or unaccompanied SATB? Which do you prefer? Yesterday at Mass, my volunteer choir gave you an opportunity to compare “apples to apples.” Simply click here and compare the first verse with the second. For the record, that melody is called by various names: ALTONA, VOM HIMMEL HOCH, ERFURT, and so on.

Jeff Ostrowski · January 8, 2024

Simple “Salve Regina” • Its Origins

In the past, I have attempted to determine the origins of the “simple” Salve Regina chant. When it comes to the so-called “restored” plainsong books, the earliest instance I can find (of the simple version) is in the LIBER RESPONSORIALIS, published in 1895, a marvelous book based upon the groundbreaking research of Dom Joseph Pothier. […]

Jeff Ostrowski · January 6, 2024

“I’ll Keep Your Secret, Choirmasters!” • (Tell Jeff)

She claimed she’d rather die than sing “womb” at Mass, since she considered it to be a medical term.

Jeff Ostrowski · January 3, 2024

Do You Recognize This “Christmas” Tune?

Over the last 70 years, ST VENANTIUS has fallen out of favor. One reason might be that many harmonizations of it are “chunky.” I was pleased to see the Brébeuf Hymnal adopted the harmonization by Dom Gregory Murray (probably the finest ever created for ST VENANTIUS). This morning, I created this pipe organ recording. The […]

Jeff Ostrowski · January 3, 2024

“Jesu Redemptor Omnium” • Translated into English

“Thou light, thou radiance of the Father, thou undying hope of all, pay heed to the prayers that thy servants pour forth throughout the earth…”

Jeff Ostrowski · December 31, 2023

PDF • January 1st (Organ Accomp. Booklet)

Anyone who wishes to may download the Organ Accompaniment Booklet (22 pages) I created for FIRST VESPERS of January 1st. That feast has various names, including “In Octava Nativitatis Domini.” These organ accompaniment booklets take forever to make!

Jeff Ostrowski · December 30, 2023

Christmas • “Approached By A Famous Musicologist”

If you’re somebody who likes grandiloquence, you’ll prefer the description by Dr. Ellis.

Jeff Ostrowski · December 26, 2023

Jeff Ostrowski Attempts To Sing “Corde Natus”

“There were only two classes of men who heard the cry that night…” Fulton J. Sheen

Jeff Ostrowski · December 26, 2023

“Corde Natus Ex Parentis” (SATB)

A few minutes ago, I uploaded an English SATB version of “CORDE NATUS EX PARENTIS” (an ancient Christmas hymn by Prudentius). A nifty Latin version is also available. The quickest way to download either is to visit #668 in the Portal and scroll down to where it says: Additional information about Hymn 668. Many people […]

Jeff Ostrowski · December 22, 2023

“Not Schmaltzy” • An Ancient Christmas Hymn

Sharing one’s opinions candidly is a quick way to make lifelong enemies.

Jeff Ostrowski · December 20, 2023

How To Contact Corpus Christi Watershed

We thought you might enjoy reading messages we’ve received over the last few weeks.

Jeff Ostrowski · December 18, 2023

“Liber Usualis” • Jeff’s Proposed Modifications

In 1957, the Abbey of Solesmes publicly claimed copyright over “the rhythmic signs 𝗮𝗻𝗱 𝘁𝗵𝗲 𝗿𝗵𝘆𝘁𝗵𝗺 𝘁𝗵𝗲𝘆 𝗿𝗲𝗽𝗿𝗲𝘀𝗲𝗻𝘁.”

Jeff Ostrowski · December 16, 2023

Our Most Popular Download Ever? • (Advent Hymn)

The more I argued, the more Kenneth insisted that none of my objections were valid…

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Jeff Ostrowski · December 15, 2023

Mandatory Advent Piece

Last Sunday, our volunteer choir sang “the mandatory piece” for ADVENT in these United States. Anyone interested can listen to the ‘live’ recording. The claim is sometimes made (erroneously) that this piece can be sung only during the final days of ADVENT. Such an assertion demonstrates a misunderstanding of where this piece came from and […]

Jeff Ostrowski · December 14, 2023

“Silent Night” • Easy Organ Arrangement

Here’s a handy organ accompaniment (PDF) in three different key signatures: MIDDLE, HIGH, and LOW. The Latin lyrics (“Silens Nox”) are courtesy of Father Valentine Young, OFM (d. 2020). The organ harmonies are very simple, yet beautiful. Those who desire such a thing may also download a Singer’s Version. Choirs will ‘pick up’ this piece […]

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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

I want to say one thing to you strongly, especially today: virginity for the Kingdom of God is not a “no,” it is a “yes!”

— Pope Francis (10/4/2013)

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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