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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

Aristotle A. Esguerra

Aristotle A. Esguerra has served in the Diocese of Madison since 2009 as music director at the churches of St. Mary, Pine Bluff and St. Ignatius, Mount Horeb, and as the chant instructor to the Cistercian Nuns of Valley of Our Lady Monastery, Prairie du Sac. Read more.

Aristotle A. Esguerra · February 14, 2015

Modal Responsorial Psalms & Gospel Acclamations

283 pages, softcover • View Table of Contents Click here to purchase this bound book. You can also download the entire book [PDF]. Complete Psalms and Gospel Acclamations (Years A, B, C, and ABC) for Sundays, Solemnities, and Feasts (including Chrism Mass and Extended Pentecost Vigil). Also included are Nuptial and Funeral Masses.  Features: Durable […]

Aristotle A. Esguerra · June 17, 2013

Singing Scripture throughout Mass: Why We Must and How We Might

For a long while I’ve been ruminating on the nature of the Liturgy, Scripture as found in the Mass Propers, the Golden Calf narrative (thanks to Ratzinger’s Spirit of the Liturgy), Good Friday tradition, and episcopal authority. Here are some semi-organized thoughts on the matter.

Aristotle A. Esguerra · April 29, 2013

A preview of Modal Responsorial Psalms and Gospel Acclamations: Round-note SATB Edition

In the near future Corpus Christi Watershed will be releasing the round-note SATB edition of Modal Responsorial Psalms and Gospel Acclamations See a sneak peek of the settings for the Extended Pentecost Vigil here.

Aristotle A. Esguerra · March 25, 2013

The Cross of Christ and Liturgical Language

To effectively defend the use of the liturgical languages of the Latin Rite in the rite’s mostly vernacular Ordinary-Form expressions, we must look to the Cross.

Aristotle A. Esguerra · March 4, 2013

An Ordinary-Form Missa Cantata (almost)

Moving towards actually enacting what the Church asks in regard to the singing of the words of the Mass given the Year of Faith theme for our diocese. An example of how this can be pulled off with already-existing resources and a few dedicated individuals.

Aristotle A. Esguerra · February 25, 2013

A Deacon on Devotional and Liturgical Music

Just because devotional music isn’t meant for liturgy doesn’t mean that it’s bad per se. A deacon’s brief observations between devotional and liturgical music.

Aristotle A. Esguerra · February 18, 2013

First Impressions of Bishop Sample’s Pastoral Letter on Sacred Music

A bishop issues diocesan-wide directives on the role of music in the liturgy. A look at some of the more noteworthy instructions.

Aristotle A. Esguerra · January 12, 2013

Aristotle A. Esguerra

Aristotle has served since 2009 as music director of two churches . . .

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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

“In the 17th century came the crushing blow which destroyed the beauty of all Breviary hymns. Pope Urban VIII (d. 1644) was a Humanist. In a fatal moment he saw that the hymns do not all conform to the rules of classical prosody.”

— Fr. Adrian Fortescue (d. 1923)

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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