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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 · November 12, 2023

A Classic Example of Modal Modulation

We can think of the modes and their traditional characters in a dynamic way, and it can help us to have a little more shape and direction in our singing.

Dr. Charles Weaver · November 9, 2023

Report • “Musical Shape of the Liturgy Conference”

This week I attended part of an excellent academic conference in honor of William Mahrt.

Dr. Charles Weaver · October 21, 2023

Two Ways of Singing the Easter Sequence

Two recordings of the same chant from the Sacred Music Symposium 2023.

Dr. Charles Weaver · October 5, 2023

PDF Dissertation • “Dom Mocquereau and Music Theory” (282 Pages)

My thesis on how Dom Mocquereau relates to other theories of musical rhythm is now available for download.

Dr. Charles Weaver · September 27, 2023

A Brief Addendum

In praise of the Cardine approach to chanting, with some further thoughts on pluralism and correctness in performance practice.

Dr. Charles Weaver · September 24, 2023

Some Questions Answered

Some very quick answers to questions posed by Patrick Williams.

Dr. Charles Weaver · September 13, 2023

A Concert in Honor of William Byrd

The better the voice is, the meeter it is to honour and serve God therewith: and the voice of man is chiefly to be employed to that end.

Dr. Charles Weaver · August 9, 2023

PDF Download • Palestrina’s Most Famous Mass Simplified

“I find Anerio’s work here to be excellent, and I hope you do as well.” —Dr. Charles Weaver

Dr. Charles Weaver · July 22, 2023

An Interview with Bruno de Labriolle

Readers interested in different stylistic approaches to Gregorian chant may enjoy this interview with the singer Bruno de Labriolle, who directs the schola of Saint-Bruno-des-Chartreux in Lyon. The views on chant and liturgy aired in the interview aren’t exactly the same as those of any of our contributors, but I personally find this group’s performances, in […]

Dr. Charles Weaver · July 20, 2023

Stomping Feet, Clattering Hooves, and Other Chant-Related Matters

Did you know that St. Augustine described the sound of one hand clapping?

Dr. Charles Weaver · July 14, 2023

Gregorian Rhythm Wars • “Weaver Responds to Williams”

“Nothing so arouses the soul, gives it wing, sets it free from the earth, releases it from the prison of the body, teaches it to love wisdom, and to condemn all the things of this life, as concordant melody and sacred song composed in rhythm.” —St. John Chrysostom

Dr. Charles Weaver · July 8, 2023

In Praise of Adaptability

A proposal: if we are going to study something as important and mysterious as Gregorian chant, we ought to be able to perform it convincingly in several different ways.

Dr. Charles Weaver · July 5, 2023

The Golden Rule and Mocquereau’s Method

Dom Mocquereau’s editions are a compromise between tradition and paleography. This explains his sometimes surprising semiological conclusions.

Dr. Charles Weaver · June 29, 2023

Some Thoughts on Gregorian Modal Ethos

You should memorize this list.

Dr. Charles Weaver · March 13, 2023

Rhetoric, Number, Measure, and Historicism

The beginnings of a response to mensuralism from the classic Solesmes point of view.

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President’s Corner

    Music List • (2nd Sunday of Lent)
    Readers have expressed interest in seeing the ORDER OF MUSIC I created for this coming Sunday, which is the 2nd Sunday of Lent (1 March 2026). If such a thing interests you, feel free to download it as a PDF file. This feast has magnificent propers. Its somber INTROIT is particularly striking—using a haunting tonality—but the COMMUNION with its fauxbourdon verses is also quite remarkable. I encourage all the readers to visit the feasts website, where the Propria Missae may be downloaded completely free of charge.
    —Jeff Ostrowski
    Like! Like! Like!
    You won’t believe who recently gave us a “like” on the Corpus Christi Watershed FACEBOOK PAGE. Click here (PDF) to see who it was. We were not only sincerely honored, we were utterly flabbergasted. This was truly a resounding endorsement and unmistakable stamp of approval.
    —Jeff Ostrowski
    Which Mass?
    In 1905, when the Vatican Commission on Gregorian Chant began publishing the EDITIO VATICANA—still the Church’s official edition— they assigned different Masses to different types of feasts. However, they were careful to add a note (which began with the words “Qualislibet cantus hujus Ordinarii…”) making clear “chants from one Mass may be used together with those from others.” Sadly, I sometimes worked for TLM priests who weren’t fluent in Latin. As a result, they stubbornly insisted Mass settings were ‘assigned’ to different feasts and seasons (which is false). To understand the great variety, one should examine the 1904 KYRIALE of Dr. Peter Wagner. One should also look through Dom Mocquereau’s Liber Usualis (1904), in which the Masses are all mixed up. For instance, Gloria II in his book ended up being moved to the ‘ad libitum’ appendix in the EDITIO VATICANA.
    —Jeff Ostrowski

Quick Thoughts

    Extreme Unction
    Those who search Google for “CCCC MS 079” will discover high resolution images of a medieval Pontificale (“Cambridge, Corpus Christi College, MS 079”). One of the pages contains this absolutely gorgeous depiction of the Sacrament of Extreme Unction.
    —Corpus Christi Watershed
    PDF Chart • “Plainsong Rhythm”
    I will go to my grave without understanding the lack of curiosity so many people have about the rhythmic modifications made by Dom André Mocquereau. For example, how can someone examine this single sheet comparison chart and at a minimum not be curious about the differences? Dom Mocquereau basically creates a LONG-SHORT LONG-SHORT rhythmic pattern—in spite of enormous and overwhelming manuscript evidence to the contrary. That’s why some scholars referred to his method as “Neo-Mensuralist” or “Neo-Mensuralism.”
    —Jeff Ostrowski
    PDF • “O Come All Ye Faithful” (Simplified)
    I admire the harmonization of “Adeste Fideles” by David Willcocks (d. 2015), who served as director of the Royal College of Music (London, England). In 2025, I was challenged to create a simplified arrangement for organists incapable of playing the authentic version at tempo. The result was this simplified keyboard arrangement (PDF download) based on the David Willcocks version of “O Come All Ye Faithful.” Feel free to play through it and let me know what you think.
    —Jeff Ostrowski

Random Quote

“By a decree of the synod of the diocese of Exeter in 1284, no one should claim any seat in a church; but whoever first entered a church for the purpose of devotion, might choose at his pleasure a place for praying.”

— A work by Fr. Husenbeth (d. 1872)

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