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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 6, 2025

This Sunday’s Communion Antiphon

If anyone can point to a similar example, please notify me.

Jeff Ostrowski · August 5, 2025

Using “Ye” Vs. “You” Correctly

Father Caraman was close friends with Monsignor Ronald Knox, Evelyn Waugh, and Sir Alec Guinness.

Jeff Ostrowski · August 4, 2025

“Pope Leo XIV Has Announced…”

My pastor asked me to write a column each week vis-à-vis sacred music and liturgy.

Jeff Ostrowski · August 2, 2025

“Chants” • 18th Sunday in Ordinary Time

The Communion chant is stunning.

Jeff Ostrowski · August 2, 2025

“Corn” From Heaven?

Some Americans believe the British version is always better.

Jeff Ostrowski · August 1, 2025

Gospel Acclamation Verses … Nowhere Assigned?

This is quite puzzling to me. Can anyone assist?

Jeff Ostrowski · July 21, 2025

“Music List” • 17th in Ordinary Time (Year C)

Readers have expressed interest in examining the “music list” I prepared for this coming Sunday.

Jeff Ostrowski · July 21, 2025

Flor Peeters In A Weird Mood?

What do you think of the dissonance on the chord I colored with pink?

Jeff Ostrowski · July 20, 2025

Communion • “Ask & You Shall Receive”

The Communion chant is exceedingly ancient.

Jeff Ostrowski · July 20, 2025

Jeff’s Mother Joins Our Fundraiser

If you have a moment…

Jeff Ostrowski · July 19, 2025

Errors in Latin: “17th Sund. Ordinary”

Even books by Fortescue and Knox have errors.

Jeff Ostrowski · July 18, 2025

“Tell Me Lies; Tell Me Sweet Little Lies.” • Re: Post-Conciliar Lectionary Problems

Do you see how they shamelessly modified the original?

Jeff Ostrowski · July 15, 2025

PDF Download • “Jeff’s Mom Joins Our Fundraiser”

Earlier this year, my mother found out we desperately needed funds and were planning to run a fundraiser…

Jeff Ostrowski · July 14, 2025

“Musicam Sacram” (5 March 1967) • Does It Apply?

During a 2012 job interview with a priest, I was asked…

Jeff Ostrowski · July 14, 2025

“What Martin Luther Said…”

Martin Luther’s hatred for the True Faith was only exceeded by his filthy and disgusting vulgarity.

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Corpus Christi Watershed

President’s Corner

    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
    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

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

“The Catholic Church has a dignity far surpassing that of every merely human society, for it was founded by Christ the Lord. It is altogether fitting, therefore, that the language it uses should be noble, majestic, and non-vernacular.”

— Blessed John XXIII (22 February 1962)

Recent Posts

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  • Extreme Unction
  • Which Mass?
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  • PDF Download • “Pange Lingua” in Simple (Contemporary) Polyphony for Three Voices

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