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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

Jeff Ostrowski • Article Archive

A theorist, organist, and conductor, Jeff Ostrowski holds his B.M. in Music Theory from the University of Kansas (2004). He completed studies in Education and Musicology at the graduate level. Having worked as a church musician in Los Angeles for ten years, in 2024 he accepted a position as choirmaster for Saint Mary of the Immaculate Conception in Michigan, where he resides with his wife and children. —Read full biography (with photographs).

Jeff Ostrowski · August 11, 2014

Important Resources for Liturgical Reform (4 of 7)

Should Church music be fun? Yes!!!

Jeff Ostrowski · August 10, 2014

The Most Insane Thing Heard By Anyone

I used to think Horowitz’s additions to the Liszt Hungarian Rhapsody were the most amazing virtuoso display I ever heard. I was wrong.

Jeff Ostrowski · August 6, 2014

Did The Ancient Mass Really Have Three Readings?

“We are repeatedly assured that there was an Old Testament reading each Sunday morning, but that quite mysteriously these all vanished by the seventh century, and vanished leaving no memory that they had ever existed…” — Fr. John Parsons

Jeff Ostrowski · August 5, 2014

Intercession by saints? Why not go directly to God?

If I didn’t answer when he called, he’d keep calling my number over and over. If I still didn’t answer, he’d start calling my family members, including siblings who lived 900+ miles away!

Jeff Ostrowski · August 5, 2014

Five Questions No Liturgist Can Answer

“The present welter of discardable booklets, mimeographed sheets, divergent paperback hymnals, and so on … has unfortunate psychological effects.” — Dr. James Hitchcock

Jeff Ostrowski · August 3, 2014

Please Help Watershed Survive

I hate asking people for money; and some Catholic organizations drive me crazy by constantly begging with an alarmist manner.

Jeff Ostrowski · August 2, 2014

How Dare We Complain?

Can you imagine trying to feed your family in the year 1300AD?

Jeff Ostrowski · July 31, 2014

“Convent Mass” For Two Sopranos — A. E. Tozer (1911)

Published in 1911, this “Convent Mass” is for two sopranos.

Jeff Ostrowski · July 30, 2014

Difference Between “Modern” and “Dark Ages”

Does modern architecture compare favorably to the architecture of the dark ages?

Jeff Ostrowski · July 29, 2014

Are Priests Permitted To Add More Scripture To The Ordinary Form? Yes!

Vatican II wanted more Scripture in the Mass, but somehow the reformers missed that memo.

Jeff Ostrowski · July 28, 2014

Staunchly Pro-Life: Former Supermodel, Kathy Ireland

“At the moment of conception, a new life comes into being. The DNA—the genetic blueprint—is there.”

Jeff Ostrowski · July 27, 2014

The Improbable Triumph Of The Latin Mass

“Complete equality of status for the old rite of Mass alongside the new rite … is just not going to happen.” — Fr. Brian W. Harrison (26 March 1995)

Jeff Ostrowski · July 25, 2014

PDF Download: Mocquereau’s 1903 “Liber Usualis”

No longer the only one … but that’s OK.

Jeff Ostrowski · July 22, 2014

Altar Servers Caught In The Act?

These altar boys are going to get in trouble.

Jeff Ostrowski · July 22, 2014

The Supreme Court & Traditional Liturgy

In my opinion, Fr. Paul Scalia’s face resembles that of his father (Justice Antonin Scalia) … but I could be completely wrong about this.

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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

Pope Gelasius in his 9th Letter to the Bishops of Lucania condemned the evil practice which had been introduced of women serving the priest at the celebration of Mass. Since this abuse had spread to the Greeks, Innocent IV strictly forbade it in his letter to the Bishop of Tusculum: “Women should not dare to serve at the altar; they should be altogether refused this ministry.” We too have forbidden this practice in the same words in Our oft-repeated constitution “Etsi Pastoralis” (§6, #21)

— Pope Benedict XIV • Encyclical “Allatae Sunt” (26 July 1755)

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