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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 · November 5, 2022

4 November 2022 • “Don’t forget!”

Monthly reminder to all: please subscribe to our free mailing list! It couldn’t be easier: (a) Go to any article; (b) Scroll to the bottom; (c) Enter your email address. We exist solely by the generosity of small donors. We have no endowment; we have no major donors; we run no advertisements; we have no savings. […]

Jeff Ostrowski · November 1, 2022

“Gregorian Chant Rhythm Wars” • Ostrowski Vs. Williams

My colleague, Patrick Williams has agreed to enter into a “colloquy” with me vis-à-vis Gregorian rhythm.

Follow the Discussion on Facebook

Jeff Ostrowski · October 29, 2022

“Christ the King” • Introit

I have attempted to record the Introit for the Feast of Christ the King according to the official rhythm of the Catholic Church. You can view the YouTube recording of my attempt. Traditionally, our Savior’s “kingship” was celebrated as part of the Epiphany—but in 1925, Pope Pius XI created the “feast of Christ the King” […]

Jeff Ostrowski · October 29, 2022

29 October 2022 • FEEDBACK

Good morning! My name is […] and I write to you from Chile. Just a short note to say: thank you for your wonderful website “Corpus Christi Watershed.” As a Catholic organist, I truly appreciate the marvelous work you have done. Your website is a tremendous library open to everyone. Thanks so much, and God […]

Jeff Ostrowski · October 28, 2022

“To Jesus Christ, Our Sovereign King” • Melody Comes From Where?

Nobody seems capable of answering this question.

Jeff Ostrowski · October 22, 2022

“Vespers of the Dead” • Most Elaborate Book of Hours I’ve Ever Seen

Our Lord said that if men withheld their praise of Him, “the very stones would cry out…”

Jeff Ostrowski · October 19, 2022

PDF Download • Plainchant on 5 lines!

I can’t think of better way to learn Gregorian chant than to download this 651-page PDF file, containing the marvelous Gregorian Vesperale (1915) by Father Karl Weinmann (d. 1929) printed on five lines. If you accompany Vespers directly from the plainsong notation, this makes life easy! It’s also fun to compare the Gregorian chant inside […]

Jeff Ostrowski · October 19, 2022

19 October 2022 • Feast of Saint Isaac Jogues & Companions

In Canada, they list Father Brébeuf first—in the United States, Father Jogues.

Jeff Ostrowski · October 19, 2022

PDF Download • “Hymn List For Sundays” (until 8 December 2022)

As a child, Rex Harrison contracted measles, which took away the sight from his left eye for the rest of his life.

Jeff Ostrowski · October 17, 2022

“Hymn By A Saint” • For All Saints (November 1st)

There’s something truly ‘haunting’ about this melody by Flor Peeters—and once it’s in your head, it’s hard to banish!

Jeff Ostrowski · October 15, 2022

USCCB • “Principal Music Books for the Eucharist”

The principal books of music for the Eucharist were recently (re-)confirmed by the United States Conference of Catholic Bishops.

Jeff Ostrowski · October 15, 2022

This Sunday’s Introit • “Official” Rhythm

Our Schola Cantorum members prefer to hear recordings of chants we’re learning. This morning I attempted this recording of the INTROIT for this coming Sunday, which is the 19th Sunday after Pentecost. My voice was groggy, but I suppose we singers can’t expect to have a recording studio follow us around all day waiting for […]

Jeff Ostrowski · October 13, 2022

PDF Download • “Liber Cantualis”

On 22 November 1963, Pope Paul VI established the “Consociatio Internationalis Musicae Sacrae.” On 16 July 1966, the Vatican reiterated that the Consociatio was “the only international association of sacred music approved by the Holy See.” It’s very difficult—at least for me—to figure out what happened to that organization, and whether it still exists. One […]

Jeff Ostrowski · October 13, 2022

PDF Download • “Salve Regina” Chant in English (Four Different Versions)

I never knew these existed until earlier today!

Jeff Ostrowski · October 11, 2022

PDF Download • 1915 “Gregorian Vesperale” … Printed On Five Lines! (651 Pages)

Father Weinmann placed plainsong on five (5) lines, yet still used Gregorian notation—including chord symbols!

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President’s Corner

    Music List • (5th Sunday of Lent)
    Readers have expressed interest in seeing the ORDER OF MUSIC I created for this coming Sunday, which is the 5th Sunday of Lent (22 March 2026). If such a thing interests you, feel free to download it as a PDF file. Traditionally, this Sunday was called ‘Passion’ Sunday. Starting in 1956, certain church leaders attempted rename both ‘Passion’ Sunday and ‘Palm’ Sunday—but it didn’t work. For example, Monsignor Frederick McManus tried to get people to call PALM SUNDAY “Second Passion Sunday”—but the faithful rejected that. I encourage all the readers to visit the feasts website, where the Propria Missae may be downloaded completely free of charge.
    —Jeff Ostrowski
    Music List • (Holy Thursday, 2026)
    Readers have expressed interest in seeing the ORDER OF MUSIC I created for Holy Thursday, which is 2 April 2026. If such a thing interests you, feel free to download it as a PDF file. I’m not sure I’ve ever heard a more piercingly beautiful INTROIT, and I have come to absolutely love the SATB version of ‘Ubi cáritas’ we are singing (joined by our burgeoning children’s choir). I encourage all the readers to visit the feasts website, where the Propria Missae may be downloaded completely free of charge.
    —Jeff Ostrowski
    “O Escam Viatorum” • (Holy Thursday)
    When I was very young, I erroneously believed the four psalms provided by the 1957 Liber Usualis—for Communion on Holy Thursday—were the “correct” music to sing on that first day of the TRIDUUM SACRUM. Those four psalms are: Psalm 22 (Dóminus regit me et nihil mihi déerit); Psalm 71 (Deus judícium tuum regi da); Psalm 103 (Bénedic ánima méa); and Psalm 150 (Laudáte Dóminum in sanctis ejus). It turns out I was way out in left field! While nothing forbids singing those psalms, many other options are equally valid. Our volunteer parish choir will sing this COMMUNION PIECE (joined by our burgeoning children’s choir) on Holy Thursday during Holy Communion. Needless to say, this will happen after the proper antiphon from the GRADUALE ROMANUM has been sung.
    —Jeff Ostrowski

Quick Thoughts

    PDF Download • “Ubi Caritas” (SATB)
    I remember singing “Ubi Cáritas” by Maurice Duruflé at the conservatory. I was deeply moved by it. However, some feel Duruflé’s version isn’t suitable for small choirs since it’s written for 6 voices and the bass tessitura is quite low. That’s why I was absolutely thrilled to discover this “Ubi cáritas” (SATB) for smaller choirs by Énemond Moreau, who studied with OSCAR DEPUYDT (d. 1925), an orphan who became a towering figure of Catholic music. Depuydt’s students include: Flor Peeters (d. 1986); Monsignor Jules Van Nuffel (d. 1953); Arthur Meulemans (d. 1966); Monsignor Jules Vyverman (d. 1989); and Gustaaf Nees (d. 1965). Rehearsal videos for each individual voice await you at #19705. When I came across the astonishing English translation for “Ubi Cáritas” by Monsignor Ronald Knox—matching the Latin’s meter—I decided to add those lyrics as an option (for churches which have banned Latin). My wife and I made this recording to give you some idea how it sounds.
    —Jeff Ostrowski
    Stumped by “Episcopalian Hymnal” (1910)
    Some consider Songs of Syon (1910) the greatest Episcopalian hymnal ever printed. As a Roman Catholic, I have no right to weigh in one way or the other. However, this particular page has me stumped. I just know I’ve heard that tune somewhere! If you can help, please email me. I’m talking about the text which begins: “This is the day the Lord hath made; In unbeclouded light array’d.” The book is by George Ratcliffe Woodward, and its complete title is: Songs of Syon: A Collection of Psalms, Hymns, and Spiritual Songs. Back in 2016, Corpus Christi Watershed scanned and uploaded this insanely rare book. For years our website was the sole place one could download it as a PDF file.
    —Jeff Ostrowski
    PDF Download • “Holy, Holy, Holy”
    For vigil Masses on Saturday (a.k.a. “anticipated” Masses) we use this simpler setting of the “Holy, Holy, Holy” by Monsignor Jules Vyverman (d. 1989), a Belgian priest, organist, composer, and music educator who ultimately succeeded another ‘Jules’ (CANON JULES VAN NUFFEL) as director of the Lemmensinstituut in Belgium. Although I could be wrong, my understanding is that the LEMMENSINSTITUUT eventually merged with “Catholic University of Leuven” (originally founded in 1425). That’s the university Fulton J. Sheen attended.
    —Jeff Ostrowski

Random Quote

“In my opinion, there should be reached the aim that all priests could continue to use the old Missal.”

— ‘Cardinal Ratzinger, Letter to Wolfgang Waldstein (14 December 1976)’

Recent Posts

  • PDF Download • “Ubi Caritas” (SATB)
  • Summer 2026 • “Gregorian Chant Course” at Aquinas College (Nashville, TN)
  • Music List • (5th Sunday of Lent)
  • Music List • (Holy Thursday, 2026)
  • “O Escam Viatorum” • (Holy Thursday)

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