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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

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 · October 6, 2017

18th Sunday after Pentecost (2nd in October)

“Let the operation of Thy mercy, we beseech Thee O Lord, direct our hearts, for without Thee we cannot please Thee.”

Jeff Ostrowski · October 4, 2017

Superlative Way To Explain Polyphony

To use melodies in this way may seem an easy task, but nothing could be further from the truth.

Jeff Ostrowski · October 3, 2017

Agnus Dei • “Missa Mille Regretz” by Fr. Cristóbal de Morales (d. 1553)

Can you hear the imaginary high note?

Jeff Ostrowski · September 29, 2017

Church Music Dubia Remain Unanswered

The time for serious discussions about church music has not yet come.

Jeff Ostrowski · September 27, 2017

Translations By Non-Catholics In A Catholic Hymnal?

The fear was that Protestant translators might distort the theology contained in the ancient Catholic hymns…

Jeff Ostrowski · September 22, 2017

Chants • Our Lady of the Holy Rosary (October 7th)

Next Sunday, some EF priests will choose an “external solemnity.”

Jeff Ostrowski · September 20, 2017

PDF Download • “Missal for the Laity” (1846)

Have you noticed liturgical progressives are never happy?

Jeff Ostrowski · September 20, 2017

16th Sunday after Pentecost (4th in September)

“Let Thy grace, we beseech Thee, O Lord, ever go before us…”

Jeff Ostrowski · September 19, 2017

PDF Download • “Lauda Sion” Hymnal (1886)

Hymns to the Blessed Virgin, Hymns for Benediction, Offertories, etc.

Jeff Ostrowski · September 15, 2017

“O Sanctissima” • SATB Contemporary Setting!

I bet you haven’t heard this arrangement!

Jeff Ostrowski · September 14, 2017

15th Sunday after Pentecost (3rd in September)

…and they glorified God, saying, “A great prophet is risen up amongst us and God hath visited His people.”

Jeff Ostrowski · September 13, 2017

Does Watershed Make A Difference?

“A huge success! My pastor was blown away at the beauty of the Mass setting by Guerrero. The people in attendance were just floored…”

Jeff Ostrowski · September 7, 2017

14th Sunday after Pentecost (2nd in September)

“Grant us, we beseech Thee, O Lord, that this saving Victim may become both the cleansing of our sins, and the propitiation of Thy might.”

Jeff Ostrowski · August 31, 2017

13th Sunday after Pentecost (1st in September)

“Having received Thy heavenly sacraments, O Lord, we beseech Thee that we may profit unto the increase of everlasting salvation…”

Jeff Ostrowski · August 30, 2017

Thoughts That Enter A Choirmaster’s Mind

A word about depression and discouragement.

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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

[on Latin] “No change in Mass: people have missals and can read. More vernacular can be useful in the Sacraments: Baptism, Confirmation, Extreme Unction, Matrimony.”

— Cardinal Spellman (one of the Vatican II fathers)

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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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President’s Message (dated 30 May 2025)

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