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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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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 · March 29, 2021

PDF Download • “Hymn to Christ the King” (SATB)

Also included: Five (5) rare rhyming renderings into English.

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Jeff Ostrowski · March 29, 2021

29 March 2021 • FEEDBACK

“E.S.” in North Dakota writes: “I just wanted to take a moment to say THANK YOU for all the hard work you have put—and continue to put—into your wonderful website. In the past two years, my parish has moved from a little house basement into a brand new church and gone from a few families […]

Jeff Ostrowski · March 29, 2021

29 March 2021 • Condemned?

On Palm Sunday, the Passion was read. Immediately after mention is made of the betrayal by Judas, the Holy Eucharist is introduced. Is this not a condemnation of “Christians” who deny the Church teaching on the SANCTISSIMUM? Here is Matthew 26: And Judas that betrayed him, answering, said: “Is it I, Rabbi?” He saith to […]

Jeff Ostrowski · March 25, 2021

Never Released Before! • Unique Version of “O Sacred Head Surrounded” (SATB)

What is a Catholic Hymnal? How old are these hymns?

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Jeff Ostrowski · March 24, 2021

Liturgical Translation: Your Thoughts?

The National Association of Pastoral Musicians has created “liturgical” materials honoring Buddha and Darwin.

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Jeff Ostrowski · March 22, 2021

Church Music’s Best Kept Secret!

Here’s a 20-second audio clip (live) from yesterday. It’s the INTROIT from Passion Sunday, when the Gospel says Jesus “hid himself” because the crowds wanted to kill Him…after He said He was greater than Abraham. Our parish uses The Saint Jean de Brébeuf Hymnal for all sung Masses, and we cherish the choral supplement because […]

Jeff Ostrowski · March 20, 2021

“Glad Trad” vs. “Rad Trad”

We are called to do something very strange…

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Jeff Ostrowski · March 19, 2021

Saint Joseph + Baby Jesus In A Walker

This luscious manuscript was created about A.D. 1453 for a French Noblewoman.

Jeff Ostrowski · March 18, 2021

18 March 2021 • “Close To Death”

When it seemed Father Jean de Brébeuf and his companions were about to meet death on 28 October 1637, he wrote a letter to his superiors. Here’s an excerpt: “It is a singular favor that His Goodness gives us, to allow us to endure something for love of Him. Now it is that we consider […]

Jeff Ostrowski · March 17, 2021

PDF Download • My Favorite Gregorian Hymn

There are so many wonderful Gregorian hymns, but the “HYMN TO SAINT JOSEPH” is my favorite.

Jeff Ostrowski · March 16, 2021

Three Radical Liturgical Changes • (Pope Pius XII)

I love Venerable Pius XII very much, but this particular change was unconscionable.

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Jeff Ostrowski · March 15, 2021

Singers • High or Low?

I consider myself a “flexible” choirmaster. When I sing with men who have low voices, I join with them at a low pitch. Here’s an excerpt from yesterday, which was LAETARE SUNDAY (the 4th Sunday of Lent). Later that same day, I sang at another Mass with a singer who has a very high voice. […]

Jeff Ostrowski · March 15, 2021

15 March 2021 • Lætare Compliment!

I agree with Keven Smith that Covid-19 has been a huge boon to my skills of improvisation on the organ. I wanted to share this amazing email (which gave me such joy), sent to me by somebody I don’t know: “My name is —— and I attended the 7:00pm Mass today at St Vitus. The […]

Jeff Ostrowski · March 14, 2021

PDF Download • “O Sacred Head Surrounded” — Twelve Organ Accompaniments

You can’t have too many harmonizations of this piece!

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Jeff Ostrowski · March 12, 2021

11 March 2021 • From Last Sunday…

Like everyone else, we are struggling under the Covid-19 restrictions. The number of singers we’re allowed have has been reduced in a severe way. But we charge forward, trusting in God. Here is a 50-second live excerpt from Mass last Sunday here in Los Angeles. Not many voices, but still beautiful (in my humble opinion).

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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

“Gregorian chant is the sacred chant, proper and principal of the Roman Church. Therefore, not only can it be used in all liturgical actions, but unless there are mitigating circumstances, it is preferable to use it instead of other kinds of sacred music.”

— “De musica sacra et sacra liturgia” (3 September 1958)

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