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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 4, 2023

PDF Download • “Congregational Booklet” (Printable) for Jeff’s New Mass Setting

A congregational booklet requested by Mr. Seth Bauer.

Jeff Ostrowski · October 3, 2023

“Must Hymns Always Rhyme?” • (With Examples)

Non-rhyming hymns are certainly a strong temptation since they’re so much easier to compose.

Jeff Ostrowski · October 3, 2023

“Slander!” • (Response to an Accusation)

A reader sent us an email which was both thoughtful and articulate. Feeling it deserved a response, I published this article a few days ago. I included the full letter sent to us by the reader, but that’s not all. Indeed, the article became rather lengthy and touched upon a number of different themes. I […]

Jeff Ostrowski · October 2, 2023

Palestrina Would Not Recognize This! • (Plus: Hopeful Signs)

On 21 September 2023, composers Dan Schutte, Roc O’Connor, and Bob Dufford stood in the Sanctuary of Old St. Patrick’s Church…

Jeff Ostrowski · October 2, 2023

Interesting story about Sergei Rachmaninoff

It’s very brief, but I think you would enjoy hearing Benno Moiseiwitsch (d. 1963) tell this really cool story about Sergei Rachmaninoff (d. 1943). Moiseiwitsch, whose playing was admired by Josef Hofmann, had studied with Theodor Leschetizky (d. 1915). I opened my recent article by speaking of a powerful quote Rachmaninoff gave to Robert Croan, […]

Jeff Ostrowski · September 30, 2023

[Quiz] • “Do You Know Your Hymns?”

In case you missed it, many readers have enjoyed taking this little Quiz On Hymns. In the context of that article, I included a sensational quote about the Holy Mass by Monsignor Ronald Knox. Moreover, I talk about how Abraham Lincoln’s mother died, as well as a fabulous Eucharistic hymn by the Archbishop of Canterbury.

Jeff Ostrowski · September 30, 2023

Eight (8) Responsorial Psalm Options • On turning Missalettes into little “gods”

They have embraced a certain opinion about matters and will never change—not even on their deathbed.

Jeff Ostrowski · September 28, 2023

William Byrd • Simple “Agnus Dei” Canon

Time flies! Back in July, I posted a PDF setting of a perfect canon by William Byrd (d. 1623) arranged as an AGNUS DEI for three voices. Last Sunday, we sang that arrangement with our volunteer choir. To hear a ‘live’ recording of it, click here (Mp3). In my humble opinion, this would be a perfect […]

Jeff Ostrowski · September 27, 2023

(Not Kidding) • Does Singing for Mass Fulfill One’s Obligation to Attend Mass?

Jeff Ostrowski provides five (5) responses to an assertion made by a priest.

Jeff Ostrowski · September 26, 2023

PDF Download • All Seven (7) Movements: “Mass in Honor of Saint Noël Chabanel”

My Mass setting for the Ordinary Form involves your Congregation, your Cantrix, and your Choir.

Jeff Ostrowski · September 25, 2023

“Slander!” • (Response to an Accusation We Received)

“Please don’t get cocky and think of your methods as somehow innately superior or universally and inarguably superior in their benefits.” —Email from a Reader

Jeff Ostrowski · September 23, 2023

“Everybody Loves Raymond” Actress Responds to Cardinal Dolan

“The ‘Lamb of God’ can reach the length of a baseball game.” —Cardinal Dolan

Jeff Ostrowski · September 20, 2023

“Glory To God” • (For Choir + Congregation)

I wish to thank everyone for the nice comments I received vis-à-vis my Glory To God setting for Choir & Congregation. A gentleman with a musical doctorate from Indiana University wrote: “Love this setting so much. And I will pray, as you asked, for your return to composition more fully. You are very very good.” […]

Jeff Ostrowski · September 20, 2023

PDF Download • “Glory To God” for Congregation & Choir (Mass of Saint Noël Chabanel)

My setting begins with the entire congregation singing—but the middle section is SATB polyphony.

Jeff Ostrowski · September 19, 2023

Gregorian Chant Introit • (Sung According to the Official Rhythm of the Catholic Church)

This coming Sunday is the 17th Sunday after Pentecost (EF).

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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

“I have a great quarrel on with Dom Mocquereau over a very stiff book of his which we have translated & which a stupid American woman wants to be adapted to her understanding & terminology. It will be a little difficult to persuade the dear old man, for the lady is going to pay the piper. Truly money is at the root of all evils!”

— Dame Laurentia (talking about Justine Ward)

Recent Posts

  • Which Mass?
  • Like! Like! Like!
  • 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
  • My Response Surprised A Parishioner ‘Upset’ About Latin

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