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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 · March 31, 2020

Sacred Music Symposium • “What We Avoid”

I wish we had to time to discuss artwork at the Sacred Music Symposium, but there’s just not enough time. At this year’s conference in June, we will sing an absolutely incredible Magnificat setting by Father Francisco Guerrero (d. 1599). If you examine the part books, you will notice a marvelous aesthetic desire to avoid […]

Jeff Ostrowski · March 31, 2020

Going Beyond Archbishop Fulton Sheen’s “Take”

Sheen has sometimes been criticized for avoiding mention of the sacred liturgy during his talks, but I cannot agree with such a view. • Includes about the Holy Eucharist, including a quote by Father Leslie Rumble and a quote from Pope Pius X+

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Jeff Ostrowski · March 29, 2020

“Abraham” • Guerrero Imitates His Teacher

Father Francisco Guerrero (d. 1599) studied music with Father Cristóbal de Morales circa 1545. He taught himself the organ. On 3 April 1542 he was engaged as a contralto by Seville Cathedral at an annual salary of 12,000 maravedís. He remained there until 1546, when, at the age of only 17, he was invited—on the […]

Jeff Ostrowski · March 27, 2020

HYMN • “Vexilla Regis” (SATB setting in English)

Father Adrian Fortescue (d. 1923) called this “perhaps the greatest of all hymns.”

Jeff Ostrowski · March 26, 2020

“Jesus Christ Is Risen Today” (Brébeuf Hymnal, #699)

During Advent, choirmasters must plan Christmas. During Lent, choirmasters must plan Easter. And so on.

Jeff Ostrowski · March 26, 2020

Too much music!

Choosing music for the Sacred Music Symposium requires careful consideration.  We make sure (always) to have great variety. Because the schedule is so full, there’s never sufficient time to discuss the music fully—indeed, we could easily do a month-long seminar on each piece!  For example, last year Dr. Calabrese conducted a setting of the Magnificat […]

Jeff Ostrowski · March 24, 2020

Repeating Repertoire? • Jeff Ostrowski

There’s an old saying: “Show me your friends, and I will tell you who you are.”

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Jeff Ostrowski · March 24, 2020

PDF Download • “Ad Regias Agni Dapes” (Organ Accompaniment)

I composed this organ accompaniment yesterday, looking ahead towards Eastertide.

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Jeff Ostrowski · March 22, 2020

Readings & Prayers Used By My Family On Sunday…

Including Fulton J. Sheen, Charles de Foucauld, and a Homily by Father Valentine Young, OFM

Jeff Ostrowski · March 21, 2020

Rehearsal Video • Breathtaking Morales “Sanctus”

CCW contributors—Jeff, Veronica, Andrea, and Cynthia—each recorded a line for this recording.

Jeff Ostrowski · March 20, 2020

“Sharing Is Caring”

I would like to share a message from a highly respected scholar.  (His articles appear in distinguished journals such as Études grégoriennes and Oxford’s Early Music.) He wrote as follows: The Brébeuf Hymnal is very tastefully done. Your team has exquisite literary and musical taste. I see from my copy of the hymnal that you […]

Jeff Ostrowski · March 20, 2020

What Frightens Me

The world’s experts have been releasing contradictory statements Re: Covid-19. I am neither a doctor nor a scientist, so I won’t comment; but I have something to say about the spine-tingling predictions made by certain politicians. When I was growing up, they told us “within ten years” we would starve due to overpopulation. The next […]

Jeff Ostrowski · March 18, 2020

Official Statement on Coronavirus

The 2020 Sacred Music Symposium “Official Statement” on Coronavirus has been posted; I encourage everyone to read it. I would like to share some advice: (1) avoid excessive amounts of “cable news” reporting on the pandemic, similar to how we diligently avoid immoral magazines and pornography; (2) let us pray for God’s mercy, and let […]

Jeff Ostrowski · March 17, 2020

The Ability To Say “I Don’t Know”

Father Valentine Young, OFM, always spoke about people incapable of saying “I don’t know.”  Such people have an answer for everything—as if saying “I don’t know” would cause them physical pain.  That’s how I acted growing up, but I stopped when I reached maturity.  Another thing I did as a kid was insist that I […]

Jeff Ostrowski · March 17, 2020

Disturbing Trend

Have you noticed how many people these days don’t know what an analogy is?  If I say to John Doe, “that’s the pot calling the kettle black,” frequently John Doe will go around telling everybody I called him an ugly pot.  It’s quite disturbing.  I’ve also noticed that many Americans believe the definition of “possible” […]

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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

By far, the event that caused the biggest increase in requests for indults from the morning Mass requirement was the Second World War. The unusual requirements of providing Mass during wartime led to some unique legislation accommodating the time of Mass. Already in 1940, Pope Pius XII issued a motu proprio addressing the situation of holding Mass in countries where a “Black-out” had been ordered.

— Father Shawn P. Tunink

Recent Posts

  • Music List • (2nd Sunday of Lent)
  • PDF Download • “Funerals in the Ordinary Form”
  • Extreme Unction
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