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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

Dr. Charles Weaver • Article Archive

Dr. Charles Weaver is on the faculty of the Juilliard School, and serves as organist and director of music at St. Mary’s Church in Norwalk, Connecticut. His research interests include the history of music theory and the theory of plainchant rhythm. He lives in Connecticut with his wife and four children.—Read full biography (with photographs).

Dr. Charles Weaver · January 16, 2022

The Communion of the Second Sunday after Epiphany

Today’s communion antiphon is a masterpiece of musical exegesis.

Dr. Charles Weaver · January 3, 2022

The Responsa ad dubia and the Solesmes Chant Restoration

The early history of Solesmes plainchant research provides a historical parallel for responding to current Vatican liturgical rules.

Dr. Charles Weaver · October 24, 2021

PDF Download • Commemorating Dr. Fayrfax

A massively underrated composer died 500 years ago today.

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Dr. Charles Weaver · May 25, 2021

A Summer Course in Old Notation

Announcing an opportunity for graduate-level summer study in sacred music.

Dr. Charles Weaver · March 7, 2021

Two Recent Talks on the Liturgy

Two of our authors offer thoughts about the meaning of the liturgy within the context of our daily lives.

Dr. Charles Weaver · February 24, 2021

Solmization from the Inside

What if we take medieval music pedagogy seriously? Do its methods have anything to offer us today?

Dr. Charles Weaver · January 31, 2021

A Lesson in Chant from the Late Fr. Foster

My personal encounter with him left a strong impression, which I will share here.

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Dr. Charles Weaver · October 10, 2020

“Arranging Polyphony for One Voice” • (Live Rec.)

When faced with restrictions on the size of the choir, history suggests that we can adapt music for smaller groups, including groups with only one singer.

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Dr. Charles Weaver · September 2, 2020

(Installment #4) “Catholic Hymnals” • Charles Weaver

On how tunes change over time, with a reflection on the sacred duty of hymn editors.

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Dr. Charles Weaver · August 20, 2020

Biography • Charles Weaver

Charles Weaver is on the faculty of the Juilliard School…

Dr. Charles Weaver · August 11, 2020

“Plainchant in Two Parts” • (Guest Article by a Julliard Faculty Member)

Polyphonic settings from a thirteenth-century Italian convent teach us how we might add a second part to a piece of plainchant.

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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

“No official approbation is required for hymns, songs, and acclamations written for the assembly.”

— Statement by the “Bishops’ Committee on the Liturgy” (10-NOV-1996)

Recent Posts

  • “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”
  • PDF Download • “Rarer Than a Blue Moon” — Side-by-Side English Translation (Pius XII Psalter)

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