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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 3, 2015

Loading Choir Binders For Sunday (4 October)

The life of a choirmaster is a life of sacrifice…

Jeff Ostrowski · October 3, 2015

Worst Song Ever?

What Church musicians can learn from “Friday” by Rebecca Black.

Jeff Ostrowski · October 1, 2015

Musical Resources • 19th Sunday after Pentecost (Extraordinary Form)

“Almighty and merciful God, in thy goodness put far from us all that may work us harm…”

Jeff Ostrowski · September 28, 2015

PDF Download • Extremely Rare Hymnal (1952)

Published by the Catholic Choirmasters’ Guild of Buffalo, New York.

Jeff Ostrowski · September 26, 2015

Fr. David Friel & Pope Francis

A friend kindly sent me these photos…

Jeff Ostrowski · September 24, 2015

Musical Resources • 18th Sunday after Pentecost (Extraordinary Form)

“In thy tender mercy, guide aright, we beseech thee, O Lord, our hearts…”

Jeff Ostrowski · September 24, 2015

Joan Brudieu • Simple Kyrie (Revised)

When people ask how to begin teaching polyphony, I show them this.

Jeff Ostrowski · September 23, 2015

Interesting Video About The Latin Mass (Massachusetts)

I believe Fr. Robert Fromageot was professor of Gregorian chant at the FSSP seminary.

Jeff Ostrowski · September 22, 2015

A Serious Problem That Needs To Be Addressed

The accusation by this lady really hurt me; but I’m not sure why…

Jeff Ostrowski · September 22, 2015

Transposed Mode • This Sunday’s Communion

One could also use a Mode VII psalm tone to “solve” the problem … but that just sounds wrong.

Jeff Ostrowski · September 19, 2015

Musical Resources • 17th Sunday after Pentecost (Extraordinary Form)

“Very humbly, O Lord, we implore of thy majesty, that the holy mysteries we are celebrating … save us from transgressing in the time to come …”

Jeff Ostrowski · September 19, 2015

“Agnus Dei” For Three Voices • Guillaume Dufay

…including a digression on why choirs hate Solfège.

Jeff Ostrowski · September 16, 2015

“Live” Recording Of Polyphonic Kyrie VIII

Last Sunday we sang a beautiful composition by Richard Rice.

Jeff Ostrowski · September 16, 2015

“The songs and hymns presently in use need to be reconsidered.”

“…it is important to avoid musical forms which, because of their profane use, are not conducive to prayer.”

Jeff Ostrowski · September 14, 2015

Fr. Jonathan Morris, Pit Bull Attack, & More

What you didn’t know about Fr. Jonathan Morris…

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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

[on Latin] “No change in Mass: people have missals and can read. More vernacular can be useful in the Sacraments: Baptism, Confirmation, Extreme Unction, Matrimony.”

— Cardinal Spellman (one of the Vatican II fathers)

Recent Posts

  • PDF Download • “Funerals in the Ordinary Form”
  • Extreme Unction
  • Which Mass?
  • Like! Like! Like!
  • PDF Download • “Pange Lingua” in Simple (Contemporary) Polyphony for Three Voices

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