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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 · April 20, 2016

Benedictus & Hosanna • “Missa Beata Mater”

My friend was in charge of picking music for papal Masses under Pope St. John Paul II.

Jeff Ostrowski · April 19, 2016

“Catholic Choirmaster” • Fascinating Photo Taken 29 August 1964

CMAA was formed the same year “Inter Oecumenici” was issued by the Vatican.

Jeff Ostrowski · April 18, 2016

“No Time For Cowardice” • A Letter To Liturgy Columnists

Too many columnists focus endlessly on minutiae while leaving untouched a crucial issue.

Jeff Ostrowski · April 18, 2016

In Memoriam • Sister Clare Crockett

She passed away when the community’s house collapsed during the earthquake that hit the Ecuadorian coast on 16 April 2016.

Jeff Ostrowski · April 16, 2016

Musical Resources • Third Sunday after Easter (Extraordinary Form)

“O God, Who dost show the light of Thy truth to them that go astray…”

Jeff Ostrowski · April 16, 2016

Feeding Our Children Liturgical “Garbage”

Some of you know I’ve been extremely ill for more than two years…

Jeff Ostrowski · April 15, 2016

Picture • Pope Pius XII in St. Peter’s (Low Mass)

With a lovely chasuble!

Jeff Ostrowski · April 11, 2016

Sacrament of Confirmation (EF) • “Fully Notated Confirmation Prayers”

You Will Want To Download These! • Written-out (“notated”) sheets for the Rite of Confirmation in the Extraordinary Form.

Jeff Ostrowski · April 10, 2016

Ven. Pope Pius XII Singing The Preface

We normally sing the way we heard the priest singing as a child…

Jeff Ostrowski · April 8, 2016

“Tantum Ergo” • Eleven (11) Harmonizations

Do you know what the “Tantum Ergo” means, word for word?

Jeff Ostrowski · April 7, 2016

“Et Cum Spiritu Tuo” in the 1961 Fulton Sheen Missal

What Fr. Philip Caraman does may surprise you…

Jeff Ostrowski · April 6, 2016

“I confess that I was a liturgical nut” says Bishop consecrated by Pope Paul VI

“The liturgy is not only worship of God; it is the way we are formed in our faith.” —Bishop Gracida

Jeff Ostrowski · April 5, 2016

We Need Assistance! Please Help Watershed Survive!

My 5-part series requesting donations seems to have failed miserably—with a few notable exceptions.

Jeff Ostrowski · April 5, 2016

Mass Propers • Fascinating Articles From 1924

Editors of “The Tablet” felt these essays were horrendous!

Jeff Ostrowski · April 4, 2016

Ward Method Studies • Space Available!

The chant must be sung lightly, and not too slowly.

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President’s Corner

    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
    PDF • “Cantus Mariales” (192 pages)
    Andrea Leal has posted an absolutely pristine scan of CANTUS MARIALES (192 pages) which can be downloaded as a PDF file. To access this treasure, navigate to the frabjous article Andrea posted Monday. The file is being offered completely free of charge. The beginning pages of the book have something not to be missed: viz. a letter from Pope Saint Pius X to Dom Pothier, in which the pope calls Abbat Pothier “a man versed above all others in the science of liturgy, and to whom the cause of Gregorian chant is greatly indebted.”
    —Jeff Ostrowski
    Music List • (2nd Sunday of Lent)
    Readers have expressed interest in seeing the ORDER OF MUSIC I created for this coming Sunday, which is the 2nd Sunday of Lent (1 March 2026). If such a thing interests you, feel free to download it as a PDF file. This feast has magnificent propers. Its somber INTROIT is particularly striking—using a haunting tonality—but the COMMUNION with its fauxbourdon verses is also quite remarkable. I encourage all the readers to visit the feasts website, where the Propria Missae may be downloaded completely free of charge.
    —Jeff Ostrowski

Quick Thoughts

    Extreme Unction
    Those who search Google for “CCCC MS 079” will discover high resolution images of a medieval Pontificale (“Cambridge, Corpus Christi College, MS 079”). One of the pages contains this absolutely gorgeous depiction of the Sacrament of Extreme Unction.
    —Corpus Christi Watershed
    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

In the Orthodox Churches they have kept that pristine liturgy, so beautiful. We have lost a bit the sense of adoration. They keep, they praise God, they adore God, they sing, time doesn’t count. God is the center, and this is a richness …

— Pope Francis (8/2/2013)

Recent Posts

  • PDF Download • “Ubi Caritas” (SATB)
  • PDF • “Cantus Mariales” (192 pages)
  • PDF Download • Fourteen (14) Versions of the Splendid Hymn: “Salve Mater Misericordiae”
  • Fulton J. Sheen • “24-Hour Catechism”
  • Music List • (2nd Sunday of Lent)

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