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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 · April 1, 2024

PDF Download • “Jeff’s Most Popular Choral Arrangement For Easter” (By Far)

My volunteer choir sang this arrangement during the offertory on Easter Sunday.

Jeff Ostrowski · March 31, 2024

“Strangest Of All…” • (Fortescue)

In his illustrious 1912 tome—The Mass: A Study Of The Roman Liturgy—Father Adrian Fortescue spoke of sequences, writing: “Strangest of all were the vernacular sequences in France and Germany, or those partly vernacular and partly Latin.” Our volunteer choir experimented with that on Holy Thursday, mixing Latin verses with an English refrain. For the record, […]

Jeff Ostrowski · March 27, 2024

“Saint Felix Creed” • Musical Setting for the Nicene Creed (Roman Missal, 3rd Edition)

Dedicated to my brother, Father Mark Ostrowski.

Jeff Ostrowski · March 26, 2024

Good Friday’s Dazzling (and Ancient) Hymn

Visit a random church on Sunday morning and ask parishioners basic questions…

Jeff Ostrowski · March 25, 2024

“Stabat Mater Dolorosa” • Four (4) Choral Settings

With a digression on ‘drab’ modern architecture.

Jeff Ostrowski · March 25, 2024

William Byrd • “Mass for Five Voices”

Working with volunteers can be discouraging, but always remember there’s light at the end of the tunnel. Yesterday, during PALM SUNDAY MASS, our 100% volunteer choir pulled out the SANCTUS from William Byrd’s “Mass for Five Voices.”  This colossal performance was the result. (They literally didn’t know I was going to have them sing that […]

Jeff Ostrowski · March 22, 2024

“Victimæ Paschali Laudes” • Thirty-One (31) Different Versions — Including Organ Accompaniments

This version by Father Adrian Fortescue is fascinating!

Jeff Ostrowski · March 22, 2024

“Reprehensible Chrism Mass” • (Do Not Click)

A disturbing video sent to us from the Diocese of Superior (Wisconsin).

Jeff Ostrowski · March 19, 2024

Church Music • “The Female Voice”

Msgr. Leo Manzetti foolishly wrote: “Church musicians, when experts in vocal art, agree that women’s voices are effeminate, sensuous, and operatic, hence un-churchly.”

Jeff Ostrowski · March 18, 2024

“Simplified” Accomp. (1,700 downloads)

The last one I uploaded was downloaded more than 1,700 times in a matter of hours. Therefore, folks seem interested in such a project.

Jeff Ostrowski · March 15, 2024

Jeff Ostrowski Attempts to Sing the Easter Introit

I opted for the Church’s official rhythm.

Jeff Ostrowski · March 12, 2024

PDF Download • Lenten Hymn + SATB Refrain

Professor Bouyer later admitted (in his memoirs) that his team of liturgical reformers had been doomed from the start, since their goal was “recasting from top to bottom—𝘢𝘯𝘥 𝘪𝘯 𝘢 𝘧𝘦𝘸 𝘮𝘰𝘯𝘵𝘩𝘴!—an entire liturgy which had required twenty centuries to develop.”

Jeff Ostrowski · March 11, 2024

“Response to Dr. Weaver” • 11 March 2024

“It would be a barbarous archaism to adopt this ancient custom in our time.” —Dom Guéranger

Jeff Ostrowski · March 9, 2024

“Church Music Job” • Salary Between $50k – $70k

“I believe any dedicated choirmaster would love to team up with a pastor like this one!” —Jeff Ostrowski

Jeff Ostrowski · March 9, 2024

The Day My Life Changed Forever

Do we believe sacred music exists?

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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

“In the 17th century came the crushing blow which destroyed the beauty of all Breviary hymns. Pope Urban VIII (d. 1644) was a Humanist. In a fatal moment he saw that the hymns do not all conform to the rules of classical prosody.”

— Fr. Adrian Fortescue (d. 1923)

Recent Posts

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

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