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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

Articles

Jeff Ostrowski · April 25, 2014

Thirteen (13) Organ Accompaniments to “Missa de Angelis” (Mass VIII)

Free PDF downloads for “Mass of the Angels” organ accompaniments • Henri Potiron (1950), Achille Bragers (1937), Dr. Eugene Lapierre (1946), Franz Xaver Mathias (1906), Dr. Peter Wagner (1905), Monsignor Leo P. Manzetti (1906), Julius Bas (1906), and more+

Richard J. Clark · April 25, 2014

PREVIEW – Mass in Honor of Pope Saint John Paul II

Preview of the “Mass in Honor of Pope Saint John Paul II” Listen to the Gloria!

Guest Author · April 25, 2014

The Thoughtful Theologian reflects on the canonisations of 27 April 2014

God is Truth Itself, and so faith transcends reason, and elevates it without contradicting it.

Dr. Peter Kwasniewski · April 24, 2014

“Soft Source of Calm Tranquillity”: The Quiet Mass

A poem set to music by Handel perfectly captures the feelings one has at a quiet low Mass. Here I try to say why this form of the Mass is so special and valuable.

Corpus Christi Watershed · April 23, 2014

VIDEO • Explaining the St. Isaac Jogues Illuminated Missal, Lectionary, & Gradual

Approved by the USCCB — 2014 Imprimatur from Bishop Slattery of Tulsa.

Jeff Ostrowski · April 22, 2014

More unites us than divides us!

Musicians tend to be very “picky” people who don’t get along with one another.

Guest Author · April 21, 2014

Francis Thompson (1859 – 1907): Catholic, Addict, Poet

The intellect of the world has been corrupted. Francis Thompson is the antidote.

Fr. David Friel · April 20, 2014

Book Review: Killing Jesus

Was It Worth the Read?

Jeff Ostrowski · April 18, 2014

Proclaim the Passion in a “Theatrical” Manner?

Scripture at Mass is an act of worship: it is not purely didactic, nor is it a make-believe drama that we must re-enact with emotion.

Richard J. Clark · April 18, 2014

Christ, the Wounded Healer

What role does suffering have in our lives and in our work?

Fr. David Friel · April 17, 2014

A Priest’s Litany of Thanksgiving

A Preparation for the Celebration of Holy Thursday

Dr. Peter Kwasniewski · April 17, 2014

Sheed on the Missal of 1968

Frank Sheed is one of my favorite Catholic authors, but when it came time for him to grapple with the liturgical revolution, either his perspicuity or his nerve failed him.

Andrew R. Motyka · April 16, 2014

Be Good to Your Choir

Give your choir some acknowledgement for all their hard work.

Jeff Ostrowski · April 15, 2014

Live Recording — Small Choir of Ninth Grade Singers (October, 2006)

What can one say about the “Art of the Fugue” by J. S. Bach? Marvelous. Simply marvelous.

Jeff Ostrowski · April 15, 2014

Free PDF Download: The Fulton J. Sheen Sunday Missal (1961)

Archbishop Sheen did not produce this Missal alone: it was a joint effort by many, especially the Jesuit priests Rev. Philip Caraman and Rev. James Walsh.

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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

“In case of urgent danger of life anyone may baptize, even a heretic or pagan. It is sufficient that he administer the essential matter and form and have the implicit intention of doing what Christ instituted. Naturally a Catholic must be preferred, if possible. A man is preferred to a woman; but anyone else to the parents.”

— Father Adrian Fortescue (1917)

Recent Posts

  • “The Unselected Hymn” • Do You Recognize It?
  • 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

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