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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 · October 22, 2025

PDF Download • “Marian Antiphon Booklet” (4 pages) + Five Rhythmic Considerations

This 4-page ‘insert’ contains the seasonal Marian antiphons and various settings of the “Kýrie” my parish will be learning.

Jeff Ostrowski · October 21, 2025

False Accusations

Even if the accusation is false, we tend to think of that person—forevermore—as “tainted” or “damaged goods.”

Jeff Ostrowski · October 20, 2025

(Part 2) • Did they simplify this hymn?

Looking through a (Roman Catholic) German hymnal printed in 1929…

Jeff Ostrowski · October 20, 2025

“Can Choral Music Survive?” • 3 Reasons It Will

You may think I’m crazy, but I have a belief when it comes to choral music.

Jeff Ostrowski · October 20, 2025

Monsignor Klaus Gamber Speaks!

An interesting quotation from the eminent liturgist, Monsignor Klaus Gamber…

Jeff Ostrowski · October 19, 2025

Feast of the Jesuit Martyrs of North America

Their feast got replaced by a Sunday this year.

Jeff Ostrowski · October 18, 2025

“Music List” • 29th in Ordinary Time (Year C)

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

Jeff Ostrowski · October 18, 2025

Fulton J. Sheen + this Sunday’s “Entrance Chant”

Gregorian melodies ‘stick’ in one’s memory in a way that’s both marvelous and surprising.

Jeff Ostrowski · October 14, 2025

Liturgical Round (“Canon”) in C-Major

I have provided an accompaniment, but it’s only for use during rehearsal.

Jeff Ostrowski · October 14, 2025

PDF Download • Liturgical Round (“Canon”) for your Children’s Choir

An example that’s truly great art, yet still within their reach.

Jeff Ostrowski · October 13, 2025

Important Quote by a Church Musician

My friend is a highly-placed musician at the Vatican.

Jeff Ostrowski · October 11, 2025

Fulton J. Sheen Played The Pipe Organ!

Sheen would occasionally display his skill on the organ to his friends.

Jeff Ostrowski · October 11, 2025

“Music List” • 28th in Ordinary Time (Year C)

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

Jeff Ostrowski · October 9, 2025

PDF Download • “Offertory” for this Sunday

Anyone know why the Book of Esther was chosen? That same section of Esther was chosen for last Sunday’s Introit.

Jeff Ostrowski · October 8, 2025

Why A “Fugue” Here?

I think you will agree about this.

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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—1 March 2026—the 2nd 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 flourishing feasts website alongside the official texts in Latin.
    —Jeff Ostrowski
    Particularly Beautiful
    The 2nd Sunday of Lent has magnificent propers. Its INTROIT is particularly striking—using a haunting tonality—but the COMMUNION with 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
    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

If the homily goes on too long, it will affect two characteristic elements of the liturgical celebration: its balance and its rhythm. The words of the preacher must be measured, so that the Lord, more than his minister, will be the center of attention.

— Pope Francis (11/24/2013)

Recent Posts

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

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