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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 · February 14, 2016

Canon Van Nuffel’s Setting Of Smoke Rising

“Smoke rises from the Mountain of Doom. The hour grows late, and Gandalf the Grey rides to Isengard seeking my counsel.”

Jeff Ostrowski · February 12, 2016

Motet • “Verbum Supernum” by Fr. Carlo Rossini

This SATB setting can be used during any liturgical season and has “O Salutaris Hostia” as one of its verses.

Jeff Ostrowski · February 11, 2016

“Audi Benigne Conditor” • Gregorian Hymn For Lent

The text is by St. Gregory the Great, who was Pope from 590-604.

Jeff Ostrowski · February 10, 2016

Decapitation of an Innocent Meadowlark

Do we remember that people in the pews often lack our musical background?

Jeff Ostrowski · February 9, 2016

Francisco Guerrero • “Hymn To The Sacred Trinity” (SATB with Plainsong)

Are you up for a special hymn challenge?

Jeff Ostrowski · February 8, 2016

What Are You Doing For Lent?

“The phone is our century’s plague. It destroys character, interaction, friendships, families, and our time. We are glued to these devices.”

Jeff Ostrowski · February 5, 2016

2016 • Sacred Music Symposium (Last Year’s)

We’re approaching capacity—if you’re interested, we need to hear from you soon!

Jeff Ostrowski · February 3, 2016

Exclusive Interview • Mr. Nancho Alvarez

“I must point out that the content of my site is totally free, granting open access to everyone.” —Nancho Alvarez

Jeff Ostrowski · February 2, 2016

Ridiculously Awesome Sanctus You’ve Never Heard

We are not allowed to sing Tropes in the Extraordinary Form, so I added that text in italics.

Jeff Ostrowski · February 2, 2016

PDF Download • Simple Pieces For Roman Catholic Church Choirs (345 Pages)

First published in 1901 by Emile Dethier, organist at the Grand Seminary in Liège, Belgium.

Jeff Ostrowski · January 31, 2016

Musical Resources • Sexagesima Sunday (EF)

“Grant, we humbly beseech Thee, almighty God, that those whom Thou refreshest with Thy sacraments…”

Jeff Ostrowski · January 26, 2016

Chosen Your Easter Alleluia Yet?

It’s time—and here’s one you’ll love.

Jeff Ostrowski · January 26, 2016

Not Your Grandmother’s Creed

Composer David Haas posted a striking proclamation on his Facebook page.

Jeff Ostrowski · January 24, 2016

Musical Resources • Septuagesima Sunday (Extraordinary Form)

Yet the laborer called at the eleventh hour does not taste the joy reserved to one who has “worked and suffered without reckoning the hours.”

Jeff Ostrowski · January 19, 2016

| Part 3 of 3 | • “Kyrie Eleison” (SATB) within the reach of any choir!

Only one word describes Guerrero’s musical genius: fearsome.

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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

    “Reminder” — Month of Febr. (2026)
    On a daily basis, I speak to people who don’t realize we publish a free newsletter (although they’ve followed our blog for years). We have no endowment, no major donors, no savings, and refuse to run annoying ads. As a result, our mailing list is crucial to our survival. It couldn’t be easier to subscribe! Just scroll to the bottom of any blog article and enter your email address.
    —Jeff Ostrowski
    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

These prayers were not peculiar to Good Friday in the early ages (they were said on Spy Wednesday as late as the eighth century); their retention here, it is thought, was inspired by the idea that the Church should pray for all classes of men on the day that Christ died for all. Duchesne is of opinion that the “Oremus” now said in every Mass before the Offertory—which is not a prayer—remains to show where this old series of prayers was once said in all Masses.

— Catholic Encyclopedia (1909)

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