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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

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Jeff Ostrowski · December 16, 2025

Should Catholics Sing Protestant Christmas Carols?

Including the “music list” I have prepared for Christmas Midnight Mass.

Jeff Ostrowski · December 16, 2025

PDF • “Music List” (Xmas Midnight Mass)

Readers have expressed interest in examining the “music list” I prepared for Christmas Midnight Mass.

Jeff Ostrowski · December 16, 2025

What does this mean? “Pre-Urbanite”

This topic I had believed to be fairly well understood—but I was wrong.

Corpus Christi Watershed · December 16, 2025

“He never had a single day of conflict with anyone.”

Upon the death of of the Very Reverend Canon Edgard De Laet.

Jeff Ostrowski · December 14, 2025

PDF • “Standard Gregorian Chants for Schools, Churches, Seminaries, & Convents” (1946) —123 pages

Until a few days ago, I knew nothing of this (extremely rare) book. Now it’s been scanned and uploaded—free to all.

Jeff Ostrowski · December 11, 2025

PDF • “Music List” (4th Sunday of Advent)

Readers have expressed interest in examining the “music list” I prepared for the 4th Sunday of Advent.

Jeff Ostrowski · December 11, 2025

PDF Download • “Santo Santo Santo”

A brief, bright, stately setting.

Jeff Ostrowski · December 10, 2025

Crucial Tips • “Teaching Children How to Sing”

When it comes to the children, I help them memorize each word…

Jeff Ostrowski · December 9, 2025

PDF • Our Lady of Guadalupe (12 Dec.)

Why should that feast overpower Our Lady of Guadalupe?

Jeff Ostrowski · December 7, 2025

“Alma Redemptóris Mater” • Everything There Is To Know About This Marian Antiphon

Including a new harmonization for the pipe organ.

Jeff Ostrowski · December 6, 2025

Simplified Accompaniment (Advent Hymn)

Simplified keyboard accompaniment for “Come, Thou Long-Expected Jesus” (Advent hymn).

Corpus Christi Watershed · December 6, 2025

Pope Leo XIV on Sacred Music

On 5 December 2025, the pope said…

Jeff Ostrowski · December 4, 2025

PDF • “Music List” (Immaculate Concep.)

Readers have expressed interest in examining the music list I prepared for 8 December (“In Conceptione Immaculata Beatae Mariae Virginis”).

Mark Haas · December 3, 2025

PDF Downloads • 5 Simple Palestrina Pieces

A collection of Palestrina works that are not only stunningly beautiful but also surprisingly accessible.

Jeff Ostrowski · December 1, 2025

PDF Download • Agnus Dei Polyphonic “Choral Extension” (Simple Round by Ravenscroft)

It’s hard to banish that round once it enters your ears!

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Corpus Christi Watershed

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

“A penalty is decreed against clerics, who, being in sacred Orders, or holding benefices, do not wear a dress befitting their Order. […] In these days, the contempt of religion has grown to such a pitch that—making but little account of their own dignity, and of the clerical honor—some even wear in public the dress of laymen…”

— ‘Council of Trent (Session 14, Chapter 6)’

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