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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 · August 27, 2024

When Teaching a Polyphony for the First Time, Use This Three-Voice Piece

The Solfège has already been added, and we made magnificent rehearsal videos for you!

Jeff Ostrowski · August 22, 2024

The Very Least We Can Do!

Today I must ask the infamous question… (ducks)

Jeff Ostrowski · August 20, 2024

“Entrance Chant” • For Sunday (1-Sep-2024)

Coming up fast is Sunday, 1 September 2024, which is the 22nd Sunday in Ordinary Time. Here is the PDF file of the ENTRANCE ANTIPHON—in Gregorian notation on five lines—which we’ll be singing. You can also download this organ accompaniment which corresponds to that file. If you’re somebopdy who enjoys rehearsal videos, you can listen […]

Jeff Ostrowski · August 20, 2024

“The Very Best 42 Seconds of Gregorian Chant”

Fulton J. Sheen, Saint John Mary Vianney, and more!

Jeff Ostrowski · August 19, 2024

“Our Father” • (Arr. for 3 Voices)

This tune has many names such as “Psalm 112” and “Old Hundred Twelfth.”

Jeff Ostrowski · August 19, 2024

Must This Be Accompanied?

The age-old question—will it ever be resolved?

Jeff Ostrowski · August 17, 2024

Music List • (20th Sund. Ordinary Time)

This coming Sunday is 18 August 2024.

Jeff Ostrowski · August 15, 2024

Music List • “Assumption” (15 August)

Several readers expressed interest in seeing my music list for the Assumption (15 August). You will notice the COMMUNION HYMN is a special version of “Ave Maris Stella” in English and Spanish. Our Mass on the Assumption was Tri-Lingual: Latin, English, and Spanish. Here’s the organ accompaniment (five pages) for that hymn. Furthermore, those who […]

Jeff Ostrowski · August 14, 2024

“Missa de Angelis” • Gloria

Feel free to download this PDF file containing GLORIA VIII (“Mass of the Angels”) harmonized by the great Belgian organist: Flor Peeters.

Jeff Ostrowski · August 14, 2024

Assumption Resp. Psalm (in Spanish)

Responsorial Psalm in Spanish for the feast of Our Lady’s Assumption, 15 August.

Jeff Ostrowski · August 13, 2024

15 August • “Our Lady’s Assumption”

Jeff shares a ‘quick thought’ regarding the topic of the sacred liturgy.

Jeff Ostrowski · August 9, 2024

Music List • (19th Sund. Ordinary Time)

This coming Sunday (11 August 2024) is the 19th Sunday in Ordinary Time, Year B. Some have expressed interest in seeing my “ORDER OF MUSIC.” If such a thing be appealing to you, it can be downloaded as a PDF file.

Jeff Ostrowski · August 6, 2024

MONTH OF AUGUST • “Reminder”

Each day I speak to folks who have followed our blog for years but (somehow) don’t realize we publish a free newsletter. Please subscribe to it! Simply scroll to the bottom of any blog article and enter your email address. We have no endowment, no major donors, no savings, and refuse to run annoyong ads. Therefore, […]

Jeff Ostrowski · August 6, 2024

“Reader Feedback” • 6 August 2024

Mrs. J.M. writes to us from Manassas, Virginia: “I’m thrilled you are offering this scan by the Sisters of the Most Precious Blood in O’Fallon, Missouri! Years ago I wrote to the sisters and one sent me a copy of all the booklets and cds. I have been such an admirer of Msgr Hellriegel’s work!”

Jeff Ostrowski · August 6, 2024

PDF Download • “Entrance Chant in English” (19th Sunday in Ordinary Time)

Including twelve (12) different versions!

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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

If they protest and want, for example, to retain at least the familiar chants of the ordinary Mass in Latin, they are told that their protest is worthless. They are not “trained.” There is no reason to take account of what they say!

— Father Louis Bouyer (1968)

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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