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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 · May 28, 2018

Can Plainsong Be Harmonized? • (Rehearsal Video)

I included several nasty “Medicæa” harmonizations from the 19th century…

Jeff Ostrowski · May 22, 2018

Rehearsal videos • Missa “Ave Maris Stella” (Victoria)

The Alto line goes down low a few times—but in those days, men might have sung this.

Jeff Ostrowski · May 16, 2018

“Outer Space Hymn” (1966) • In A Catholic Hymnal

Discussion of horrible things that have (sadly) appeared in Catholic hymnals, such as: “And as we float along through outer space, | Past galaxies aglow in dark’s embrace, | Toward other worlds where brothers may await, | Do care for us now in our weightless state.” (Imprimatur 1966)+

Jeff Ostrowski · May 9, 2018

Los Angeles • Audio Excerpts from Solemn Mass

Posting choral singing captured by a pocket recorder is always risky…

Jeff Ostrowski · May 8, 2018

“Pater Noster” by Monsignor Jules Van Nuffel

A “contemporary” composer who’s inspired me since 1998.

Jeff Ostrowski · May 6, 2018

Saint Vitus Choir Page

You can still come to this page but the technical URL destination is now as follows: https://www.ccwatershed.org/2020/04/08/2022-revised-saint-vitus-choir-page/

Jeff Ostrowski · May 6, 2018

11:00am Choir Page

Our first rehearsal will be on Wednesday night, 27 January 2021, at 7:00pm at Saint Vitus. The first Mass we sing is 31 January 2021, call time 10:30am. The rest of the schedule: *  PDF Download • SCHEDULE for 11:00AM —This shows February and March. Learn “Kyrie IV” from the Père Daniel Website. #88208 • “Non […]

Jeff Ostrowski · May 1, 2018

PDF Download • A “Bright” Eucharistic Hymn

Could there be a nicer hymn than this? It is fresh and glorious.

Jeff Ostrowski · April 29, 2018

Yesterday’s Solemn Mass Was An Inflection Point

Consider three (3) clerics who took part in this Solemn Mass at the National Shrine

Jeff Ostrowski · April 24, 2018

Directing A Choir: Are You Tough Enough?

Your sense of humor says it all…

Jeff Ostrowski · April 5, 2018

“ Dissonance? ” • Gregorian Accompaniment

Nothing could be further from the truth!

Jeff Ostrowski · April 2, 2018

I Was Wrong to Dread the “Pre-1955” Holy Week

Five (5) differences between the ancient rites of Holy Week (“Pre-1955”) and the Pius XII version.

Jeff Ostrowski · April 2, 2018

“Crotalus” • How Does It Sound?

Holy Thursday pew version from a pocket recorder.

Jeff Ostrowski · March 27, 2018

PDF Download • Organ Accompaniment for “Vexilla Regis” (Hymn) by Fr. Adrian Fortescue

When I saw this page, my opinion of Fortescue went down—but then I remembered…

Jeff Ostrowski · March 26, 2018

Musical Resources • Holy Thursday (FSSP, 2018)

“…Who didst establish the salvation of mankind on the tree of the Cross; that whence death came, thence also life might arise again, and that he, who overcame by the tree, by the tree also might be overcome…” —Preface

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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

“In everything of any importance at all, Sarum (and all other mediæval rites) was simply Roman, the rite which we still use.”

— Fr. Adrian Fortescue (1912)

Recent Posts

  • Extreme Unction
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  • PDF Download • “Pange Lingua” in Simple (Contemporary) Polyphony for Three Voices
  • PDF Download • “Gregorian Chant Booklet” mailed by Pope Saint Paul VI to every bishop

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