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Corpus Christi Watershed

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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 · June 12, 2022

PDF Download • Trinity Sunday (22 pages)

Feel free to download this Organ Accompaniment Booklet for Trinity Sunday (Second Vespers). Notice how the modes progress by number. Psalm 1 is mode 1; Psalm 2 is mode 2; Psalm 3 is mode 3; Psalm 4 is mode 4; Psalm 5 is mode 5. I am told by an expert that other feasts (such […]

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Jeff Ostrowski · June 11, 2022

Composing Your Own Antiphons?

In the days before Vatican II, dioceses had their own special feast days.

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Jeff Ostrowski · June 11, 2022

10 June 2022 • “Official” rhythm of plainsong

I continue to search for the most beautiful way to present the “pure” Editio Vaticana scores. (Technically, the “pure” rhythm of the official edition is what everyone is supposed to use.) You can download my latest attempt, which is the Introit for this coming Sunday: Feast of the Most Holy Trinity. Because this is not […]

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Jeff Ostrowski · June 9, 2022

New Release! • “Missa de Beata Virgine” (Kevin Allen)

As singers performed this Kevin Allen piece, they wept—but crying is bad for singing technique!

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Jeff Ostrowski · June 7, 2022

7 June 2022 • FEEDBACK

From Chelan, Washington: “CCWatershed is a God-sent resource that I can’t function without! Such great work by the team to bring beauty back to our liturgy!” From Gainesville, Florida: “I am so appreciative of the work, of my brothers and sisters in music!” From Troutman, North Carolina: “Keep up the excellent work in service of the Liturgy!”

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Jeff Ostrowski · June 7, 2022

“An Unknown Parishioner Approached Me…”

Can modern composers write hymns? Are they stirring?

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Jeff Ostrowski · June 5, 2022

PDF Download • (Organ Accompaniment)

I created this organ accompaniment booklet for organists who will accompany Vespers on Pentecost Sunday. Feel free to download it; it might give you some ideas or inspiration. Be warned: It looks pretty sloppy. (The organist is the only one who sees it.)

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Jeff Ostrowski · June 3, 2022

Revelation • “Re: The Official Rhythm”

A very intelligent singer admitted that only yesterday did he finally come to understand what a “melismatic mora vocis” is. Only yesterday did he come to understand the “white notes” (blank spaces). You can see the Introit for Pentecost Sunday only has two instances of MMV (“melismatic mora vocis”).

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Jeff Ostrowski · June 3, 2022

3 June 2022 • FEEDBACK

From Saint Petersburg, Florida: “Thank you so much for all of your tireless and selfless work in building up the Kingdom of God and Helping us on the path toward heaven! Your work for many years now has borne much fruit in my life and in the lives of whom I work with. May the […]

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Jeff Ostrowski · June 1, 2022

1 June 2022 • FEEDBACK

From Pennsylvania: “Thank you for all of the music on your website! It has been of immense help to me as a choir director.” From Minnesota: “Thank you for your awesome ministry! I started going to a Latin mass parish about 10 years ago, and this website has been indispensable to me. I could not […]

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Jeff Ostrowski · June 1, 2022

The Official Chant Rhythm • “How Does It Sound?”

“The Vatican Edition … contains absolutely all that is needed for the exact rendition of the liturgical chant.” —Sacred Congregation of Rites (1911)

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Jeff Ostrowski · May 31, 2022

Kevin Allen • “What is Sacred Music?”

J. F. M. kindly made us aware of the following video clip, which features Kevin Allen.

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Jeff Ostrowski · May 28, 2022

28 May 2022 • “Pristine” Vatican Rhythm

My choirs have been singing from the “pure” Editio Vaticana rhythm, which is (technically) the official rhythm of the Catholic Church. I haven’t quite decided how I want the scores to look yet, but this one I’ve produced for tomorrow, Dominica Post Ascensionem (“Sunday after the Ascension”).

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Jeff Ostrowski · May 27, 2022

27 May 2022 • FEEDBACK

A reader from Wisconsin: “I will pray for you and CC Watershed. This site has been one of the most valuable resources I have in helping me run a choir for an ICKSP apostolate.” A reader from New York: “May God bless you for your wonderful work! This site has been invaluable to me.” A […]

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Jeff Ostrowski · May 26, 2022

PDF Download • “Spanish TLM Missal” (2,288 pages)

A french version (1,798 pages) is also available for free PDF download.

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Corpus Christi Watershed

President’s Corner

    Music List • “Ascension of the Lord”

    Readers have expressed interest in examining my “music list” for this coming Sunday.

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    —Jeff Ostrowski
    PDF Download • “For Pentecost Sunday”

    There’s a triple ‘allelúja’ and I just love the chord at the end of the 2nd iteration.

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    —Jeff Ostrowski
    PDF Download • “Organ Accompaniment”

    The following declaration will probably smack of “blowing my own horn.”

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    —Jeff Ostrowski

Quick Thoughts

    “Thee” + “Thou” + “Thine”

    Regarding approval for the “Revised Standard Version (Catholic Edition).”

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    —Jeff Ostrowski
    “Reminder” — Month of May (2026)

    Since a new month has arrived, it’s my pleasure to remind you that…

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    —Jeff Ostrowski
    Simplified Version • “Canon in D” (Pachelbel)

    I don’t care what people say; I love this piece!

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    —Jeff Ostrowski

Random Quote

“Only against this background, of the effective denial of the authority of Trent, can one understand the bitterness of the struggle against allowing the celebration of Mass according to the 1962 Missal after the liturgical reform. The possibility of so celebrating constitutes the strongest, and thus (for them) the most intolerable contradiction of the opinion of those who believe that the faith in the Eucharist, as formulated by Trent, has lost its validity.”

— Cardinal Ratzinger, 2001

Recent Posts

  • “A New Chapter” • Subscriptions!
  • 7 Suggestions • Singing Gregorian Chant “Correctly”
  • Music List • “Ascension of the Lord”
  • Call For Submissions! • ‘Usus Antiquior’ in Contemporary Catholicism (October 2026)
  • Inspiring Paper from a Graduating High School Senior

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