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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 13, 2015

Nixon, Watergate, & Singing The Mass Propers

Ehrlichman, Haldeman, Dean, Nixon, and others made tons of money writing and speaking about Watergate.

Jeff Ostrowski · April 13, 2015

Don’t Tell Me What You Can Do: Show Me

Directing a choir is extremely difficult. The obstacles often seem insurmountable.

Jeff Ostrowski · April 13, 2015

Cardinal Dolan Vested In Ferriola?

Can someone who knows about vestments confirm this?

Jeff Ostrowski · April 12, 2015

Musical Resources • Low Sunday (a.k.a. “Divine Mercy Sunday” or “Quasimodo” or “White Sunday”)

The organ is back!

Jeff Ostrowski · April 9, 2015

Easter Vigil Readings With Dancer • St. Patrick Catholic Church (Seattle, Washington)

I was surprised to see composer David Haas comment on facebook in support of this.

Jeff Ostrowski · April 9, 2015

First Look Images! • “Proper Of The Mass” By Fr. Samuel F. Weber

This 1,292 page book is much thinner than I had anticipated.

Jeff Ostrowski · April 8, 2015

Fascinating Videos From 1958 • Mass Sung In English!

A “Dialogue” Low Mass with singing (c. 1958) by choristers of St Mary’s Cathedral, Sydney.

Jeff Ostrowski · April 7, 2015

Photographs • FSSP Holy Triduum in Los Angeles (2015)

Notice how the priest, dressed in cope, is engulfed in darkness at the beginning of the Easter Vigil—except for candles burning.

Jeff Ostrowski · April 7, 2015

It Has Arrived! • “Proper of the Mass” (Ignatius)

You will notice that Fr. Weber’s version sounds quite similar to the authentic Latin chant.

Jeff Ostrowski · April 6, 2015

Can You Love Liturgy Too Much?

Should we assume malice on the part of those who denigrate the Traditional Mass?

Jeff Ostrowski · April 6, 2015

Jaw-Dropping Liturgical Manuscripts (7,055 Pages)

Catholics can now *see with their own eyes* the antiquity of our liturgy.

Jeff Ostrowski · April 4, 2015

Rough PDF • Rubrics & Music, Holy Saturday (1962)

I don’t usually release “rough cut” PDF files, but this one is so valuable…

Jeff Ostrowski · April 4, 2015

PDF Download: Organ Accompaniment to “Et Valde Mane” • 1955 Easter Vigil

A thing desired by many!

Jeff Ostrowski · April 3, 2015

Rubrics • Good Friday (Pius XII Holy Week Revisions)

Even Solesmes makes errors from time to time.

Jeff Ostrowski · April 2, 2015

An Essential & Unique Thing For Holy Thursday

…and a look at Holy Thursday from the 1965 Missal.

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Corpus Christi Watershed

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

Had the Church never spoken on this matter, it would still be repugnant to our Catholic people’s sense of what is fit and proper in the holiest of places, that a priest should have to struggle through the prayers of the Holy Mass, because of such tunes as “Alice, where art thou?” the “Vacant Chair,” and others of more vulgar title, which, through the carelessness or bad judgment of organists, sometimes find their way into our choirs.

— Preface to a Roman Catholic Hymnal (1896)

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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