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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 26, 2015

PDF Download • “Story of Redemption” for Children (1952) • With Audio Recordings!

“I’m sure you’ll enjoy the beautiful poems, songs, and pictures…” —Very Rev. Norbert M. Shumaker

Jeff Ostrowski · October 23, 2015

Musical Resources • Feast of Christ the King (Extraordinary Form)

“And all the kings of the earth shall adore Him; all nations shall serve Him…”

Jeff Ostrowski · October 21, 2015

PDF Download • “Christ The King Hymnal” (1955)

An extremely rare Canadian hymnal produced by Rev. Aloysius Knauff.

Jeff Ostrowski · October 19, 2015

Beautiful Photo Of Blessed Pope Paul VI

The entrance procession from his coronation.

Jeff Ostrowski · October 19, 2015

Watershed Turns Nine Today!

Talking about perennial truths doesn’t get as many “clicks” as provocative headlines or character assassination.

Jeff Ostrowski · October 17, 2015

Musical Resources • 21st Sunday after Pentecost (Extraordinary Form)

“…in Thine infinite mercy, O Lord, restore our souls to health…”

Jeff Ostrowski · October 17, 2015

Yikes! Even The Monastery Of Solesmes

Did you notice how they carefully deleted all the beautiful artwork?

Jeff Ostrowski · October 16, 2015

Watershed Needs Your Help To Continue!

“Watershed has been extremely helpful and has brought so much solace and support…”

Jeff Ostrowski · October 15, 2015

What? Sundays after Pentecost?

Be careful this year.

Jeff Ostrowski · October 14, 2015

When Choirmasters Despair

No matter how superb your music program is…

Jeff Ostrowski · October 11, 2015

Kyrie XI • Gregorian Chant

I’ve wrongly neglected this famous chant.

Jeff Ostrowski · October 10, 2015

The Week In Review

Seven random thoughts…

Jeff Ostrowski · October 10, 2015

Musical Resources • 20th Sunday after Pentecost (Extraordinary Form)

“May these mysteries, we beseech thee, O Lord, bring us from heaven a healing medicine…”

Jeff Ostrowski · October 7, 2015

Sloppy 1953 Schwann

The “white notes” (as Dr. Joseph Lennards called them) are quite sloppy, which really took me by surprise.

Jeff Ostrowski · October 3, 2015

Loading Choir Binders For Sunday (4 October)

The life of a choirmaster is a life of sacrifice…

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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

“Always remember: God opposes the proud.” (leaning into the microphone) “…even when they’re right!”

— ‘Scott Hahn, speaking in Plano, TX’

Recent Posts

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