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Corpus Christi Watershed

We’re a 501(c)3 public charity established in 2006. We have no endowment, no major donors, no savings, and run no advertisements. We exist solely by the generosity of small donors.

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Views from the Choir Loft

Francisco Guerrero Composer

Jeff Ostrowski · June 13, 2025

Luis Martínez Must Go!

This notice shows that in Seville, as elsewhere, polyphonic singers clustered around a large open choirbook set on a stand in the middle of the grilled choir-enclosure.

Jeff Ostrowski · February 28, 2025

Re: “Abuse of Catholic Church Musicians”

Listening to yourself singing isn’t fun—but it’s crucial if you wish to improve.

Jeff Ostrowski · September 27, 2023

(Not Kidding) • Does Singing for Mass Fulfill One’s Obligation to Attend Mass?

Jeff Ostrowski provides five (5) responses to an assertion made by a priest.

Jeff Ostrowski · September 20, 2023

PDF Download • “Glory To God” for Congregation & Choir (Mass of Saint Noël Chabanel)

My setting begins with the entire congregation singing—but the middle section is SATB polyphony.

Jeff Ostrowski · February 4, 2023

Church Music Shouldn’t Be “Headache-Inducing”

Authentic sacred music should attract people. It should not drive them away.

Jeff Ostrowski · September 20, 2022

PDF Download • Brief Polyphonic “Asperges Me” for SATB by Father Guerrero (d. 1599)

Here’s my attempt at recording all the voices myself, to give you a rough idea how it sounds.

Jeff Ostrowski · September 9, 2022

“Defending the English” • Brief Riposte from Uganda

“As for the subject of whether the music of Tallis, Taverner, and Tye was tainted by the reformation, I would agree with Mr. Ostrowski.” —Reader from Uganda

Jeff Ostrowski · August 20, 2022

“New Section 2” • (Piecemeal Agnus Dei)

A wonderful way to get volunteers singing SATB polyphony immediately!

Jeff Ostrowski · June 11, 2022

Composing Your Own Antiphons?

In the days before Vatican II, dioceses had their own special feast days.

Jeff Ostrowski · May 21, 2022

PDF Download • “A Canon Choirs Love!”

You will notice Father Guerrero takes the chant melody (“Beata Mater”) and creates a perfect canon between Soprano and Alto.

Corpus Christi Watershed · May 3, 2022

“Repertoire Page” • Sacred Music Symposium 2022

Sign up today! A few voice parts still have openings.

Jeff Ostrowski · December 21, 2021

“Benedictus” (Missa Iste Sanctus) • All voices recorded by Corrinne May

Vatican II said: “The treasury of sacred music is to be preserved and fostered with great care” (SC §114).

Jeff Ostrowski · November 8, 2021

Missa “My Little Pony” by Dan Schutte • Its Pedigree

A USCCB statement: singing psalms at Mass “may create problems” … ?

Follow the Discussion on Facebook

Jeff Ostrowski · October 13, 2021

Seven Solutions • “Getting Catholics Singing Again”

At the conservatory, we’re surrounded by hundreds of professional musicians; but stepping into a Catholic parish the situation is quite different.

Follow the Discussion on Facebook

Jeff Ostrowski · September 24, 2021

“Easy Polyphonic Agnus Dei” • Part 3 of 3

The ability of your singers to sight-read music instantly does not guarantee a good performance.

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Corpus Christi Watershed

President’s Corner

    Luis Martínez Must Go!
    Sevilla Cathedral (entry dated 13 December 1564): The chapter orders Luis Martínez, a cathedral chaplain, to stay away from the choirbook-stand when the rest of the singers gather around it to sing polyphony—the reason being that “he throws the others out of tune.” [Excerpt from “The Life of Father Francisco Guerrero.”]
    —Jeff Ostrowski
    Urgent! • We Desperately Need Funds!
    A few days ago, the president of Corpus Christi Watershed posted this urgent appeal for funds. Please help us make sure we’re never forced to place our content behind a paywall. We feel it’s crucial that 100% of our content remains free to everyone. We’re a tiny 501(c)3 public charity, entirely dependent upon the generosity of small donors. We have no endowment and no major donors. We run no advertisements and have no savings. We beg you to consider donating $4.00 per month. Thank you!
    —Jeff Ostrowski
    “Booklet of Eucharistic Hymns” (16 pages)
    I was asked to create a booklet for my parish to use during our CORPUS CHRISTI PROCESSION on 22 June 2025. Would you be willing to look over the DRAFT BOOKLET (16 pages) I came up with? I tried to include a variety of hymns: some have a refrain; some are in major, others in minor; some are metered, others are plainsong; some are in Spanish, some are in Latin, but most are in English. Normally, we’d use the Brébeuf Hymnal—but we can’t risk having our congregation carry those heavy books all over the city to various churches.
    —Jeff Ostrowski

Quick Thoughts

    Pope Pius XII Hymnal?
    Have you ever heard of the Pope Pius XII Hymnal? It’s a real book, published in the United States in 1959. Here’s a sample page so you can verify with your own eyes it existed.
    —Corpus Christi Watershed
    “Hybrid” Chant Notation?
    Over the years, many have tried to ‘simplify’ plainsong notation. The O’Fallon Propers attempted to simplify the notation—but ended up making matters worse. Dr. Karl Weinmann tried to do the same in the time of Pope Saint Pius X by replacing each porrectus. You can examine a specimen from his edition and see whether you agree he complicated matters. In particular, look at what he did with éxsules fílii Hévae.
    —Corpus Christi Watershed
    Antiphons Don’t Match?
    A reader wants to know why the Entrance and Communion antiphons in certain publications deviate from what’s prescribed by the GRADUALE ROMANUM published after Vatican II. Click here to read our answer. The short answer is: the Adalbert Propers were never intended to be sung. They were intended for private Masses only (or Masses without music). The “Graduale Parvum,” published by the John Henry Newman Institute of Liturgical Music in 2023, mostly uses the Adalbert Propers—but sometimes uses the GRADUALE text: e.g. Solemnity of Saints Peter and Paul (29 June).
    —Corpus Christi Watershed

Random Quote

“Naturally the accompaniment of the organ is merely tolerated during the office of the dead, but in fact, in nearly every parish this toleration has become a habit.”

— Henri Potiron, 1958

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Corpus Christi Watershed is a 501(c)3 public charity dedicated to exploring and embodying as our calling the relationship of religion, culture, and the arts. This non-profit organization employs the creative media in service of theology, the Church, and Christian culture for the enrichment and enjoyment of the public.

The election of Pope Leo XIV has been exciting, and we’re filled with hope for our apostolate’s future!

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