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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

Participatio Actuosa

Jeff Ostrowski · February 10, 2026

“Let the Choir Have a Voice” • Jeff Ostrowski’s Essay on Choral Music in the Catholic Mass

“In a world filled with a lot of noise, your sacred song lifts our hearts to heaven…” —Parishioner

Jeff Ostrowski · October 13, 2025

Important Quote by a Church Musician

My friend is a highly-placed musician at the Vatican.

Jeff Ostrowski · September 2, 2025

PDF Download • “Full, Conscious, & Active Participation” (12-page pamphlet)

During my research, I discovered three previously-unseen photographs of Hannibal Bugnini (taken in November of 1979).

Dr. Samuel Backman · June 6, 2025

“Participation” • Recovering its Receptive Dimension

“The goal of our active participation is not that we might shape and mold God, but that he might shape and mold us.” —Dr. Samuel Backman

Jeff Ostrowski · February 18, 2025

“Theology of Worship” • Msgr. Robert Skeris (1998)

Mother Angelica asks Monsignor Skeris why liturgical music must be sacred.

Jeff Ostrowski · October 8, 2024

PDF Download • Choral Extension! • (Corresponding to the “Holy, Holy, Holy” of the Missal Chants)

Probably one of the most valuable PDF scores we’ve ever released.

Fr. David Friel · March 10, 2020

Liturgical Custody of the Eyes

Guarding the Sense of Sight so as to Promote Participation

Follow the Discussion on Facebook

Fr. David Friel · October 21, 2018

Participation Booklet (Spanish) for Extraordinary Form Baptisms

Un recurso para facilitar una participación más profunda

Fr. David Friel · October 6, 2018

Participation Booklet for Extraordinary Form Baptisms

A resource for facilitating deeper participation

Corpus Christi Watershed · July 7, 2016

Cardinal Sarah “Reform of the Reform” (5 July 2016) • Full Address in French & English

Breathtaking statements from the Vatican’s chief liturgist who—while on retreat—goes 72 hours without food or water.

Dr. Alfred Calabrese · December 17, 2015

An Antidote For Clericalism: Sung Vespers

The public singing of Vespers is an antidote to the kind of clericalism frequently condemned by Pope Francis.

Jeff Ostrowski · June 22, 2015

EWTN Classic • “Theology of Worship” with Fr. Robert Skeris (1998)

Mother Angelica sat down for a wonderful interview with a famous Theologian.

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Corpus Christi Watershed

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

“You have thereby removed from the celebration of the Mass all superstitions, all greed for lucre, and all irreverence … removed its celebrations from private homes and profane places to holy and consecrated sanctuaries. You have banished from the temple of the Lord the more effeminate singing and musical compositions.”

— ‘Bishop Racozonus, speaking at the last session of the Council of Trent (1563)’

Recent Posts

  • Music List • (2nd Sunday of Lent)
  • PDF Download • “Funerals in the Ordinary Form”
  • Extreme Unction
  • Like! Like! Like!
  • Which Mass?

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