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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

    Simplified Accomp. • Schubert’s “Ave Maria.”
    Sometimes the organist must simultaneously serve as the CANTOR. (Those who work in the field of church music know exactly what I’m talking about.) One of our contributors composed this simplified keyboard accompaniment for Franz Schubert’s “Ave Maria,” a piece which is frequently requested for Catholic funerals and weddings. In terms of the discussion about whether that piece is too theatrical (‘operatic’) for use in Church, I will leave that discussion to others. All I know is, many church musicians out there will appreciate this simplified version.
    —Jeff Ostrowski
    “Reminder” — Month of April (2026)
    On a daily basis, I speak to people who don’t realize we publish a free newsletter (although they’ve followed our blog for years). We have no endowment, no major donors, no savings, and refuse to run annoying ads. As a result, our mailing list is crucial to our survival. It couldn’t be easier to subscribe! Just scroll to the bottom of any blog article and enter your email address.
    —Jeff Ostrowski
    Simplified Accompaniment (Easter Hymn)
    Number 36 in the Brébeuf Hymnal is “At the Lamb’s high feast we sing,” an English translation for Ad Cenam Agni Próvidi (which was called “Ad Régias Agni Dapes” starting in 1631). As of this morning, you can download a simplified keyboard accompaniment for it. Simply click here and scroll to the bottom. Many organists are forced to serve simultaneously as both CANTOR and ACCOMPANIST. In spite of what some claim, this can be difficult—which explains why choirmasters appreciate these simplified keyboard accompaniments. Sadly, many readers will click that link but forget to scroll to the bottom where the simplified PDF file is located.
    —Jeff Ostrowski

Quick Thoughts

    PDF Download • “Anima Christi”
    I received a request for an organ accompaniment I created way back in 2007 for the “Anima Christi” Gregorian Chant. You can download this PDF file which has the score in plainsong followed by a keyboard accompaniment. Many melodies have been paired with “Anima Christi” over the centuries, but this is—perhaps—the most common one.
    —Jeff Ostrowski
    PDF • “Liturgical Law” (467 Pages)
    On Good Friday during the middle ages, the pope privately recited THE ENTIRE PSALTER. If you don’t believe me, see for yourself by reading this passage by Dom Charles Augustine Bachofen (d. 1943). His famous book—called “Liturgical Law: A Handbook Of The Roman Liturgy”—was published by the Benjamin Herder Book Company, which was the American arm (operating out of St. Louis, Missouri) of one of the world’s most significant Catholic publishers. Dom Charles Augustine Bachofen was born in Switzerland but spent his career between the Benedictine monasteries at Conception (Missouri) and Mount Angel (Oregon). His 1931 masterpiece, Liturgical Law can be downloaded as a PDF file … 467 pages!
    —Jeff Ostrowski
    “Gregorian Chant Quiz” • 24 March 2026
    How well do you know your Gregorian hymns? Do you recognize the tune inserted into the bass line on this score? For many years, we sang the entire Mass in Gregorian chant—and I mean everything. As a result, it would be difficult to find a Gregorian hymn I don’t recognize instantly. Only decades later did I realize (with sadness) that this skill cannot be ‘monetized’… This particular melody is used for a very famous Gregorian hymn, printed in the LIBER USUALIS. Do you recognize it? Send me an email with the correct words, and I promise to tell everybody I meet about your prowess!
    —Jeff Ostrowski

Random Quote

Bishops have a duty towards both wise and foolish. They have to rouse the devotion of the carnal people with material ornament, since they are incapable of spiritual things.

— St. Bernard of Clairvaux (†1153)

Recent Posts

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  • Simplified Accomp. • Schubert’s “Ave Maria.”
  • “The Unselected Hymn” • Do You Recognize It?
  • 2026 Sacred Music Pilgrimage (Washington DC) • With Richard J. Clark

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