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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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President’s Corner

    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
    PDF Download • “Atténde Dómine”
    Although it isn’t nearly as ancient as other hymns in the plainsong repertoire, Atténde Dómine, et miserére, quía peccávimus tíbi (“Look down, O Lord, and have mercy, for we have sinned against Thee”) has become one of the most popular hymns for LENT—perhaps because it was included in the famous Liber Usualis of Solesmes. This musical score (PDF file) has an incredibly accurate version in English, as well as a nice version in Spanish, and also the original Latin. Although I don’t claim to have a great singing voice, this morning I recorded this rehearsal video.
    —Jeff Ostrowski
    Music List • (1st Sunday of Lent)
    Readers have expressed interest in seeing the ORDER OF MUSIC I’ve prepared for this coming Sunday—22 February 2026—the 1st Sunday of Lent (Year A). If such a thing interests you, feel free to download it as a PDF file. As always, the Responsorial Psalm, Gospel Acclamation, and Mass Propers for this Sunday are available at the outstanding feasts website alongside the official texts in Latin. I spent an enormous amount of time preparing this ORDER OF MUSIC—because the children’s choir will join us—and some of its components came out great. For example, the COMMUNION ANTIPHON with Fauxbourdon is utterly resplendent, yet still ‘Lenten’.
    —Jeff Ostrowski

Quick Thoughts

    “Reminder” — Month of Febr. (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
    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

“Much more serious was the problem, what to do about ‘thou’ and ‘you.’ I confess I would have liked to go the whole hog, and dispense with the use of ‘thou’ and ‘thee’, even where the Almighty was being addressed. They do these things in France, but I felt sure you could not get it past the British public. Why not, then, have ‘thou’ for God and ‘you’ for man? That is Moffatt’s principle; but it seems to me to break down hopelessly in relation to our Incarnate Lord…”

— Monsignor Ronald A. Knox

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