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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 · December 10, 2015

Rehearsal Videos • Victoria’s “Ave Maria” (SATB)

Including six reasons why Tomás Luis de Victoria may be the true composer of this piece.

Jeff Ostrowski · December 7, 2015

Propers for Our Lady of Guadalupe (12 December)

Providing music for the Traditional Latin Mass is not nearly as hard as some believe.

Jeff Ostrowski · December 7, 2015

Rehearsal Videos • “O Magnum Mysterium” (Victoria)

With a masterpiece like this, we must be careful not to rush in where angels fear to tread.

Jeff Ostrowski · December 5, 2015

Musical Resources • Second Sunday of Advent (Extraordinary Form)

“Gather ye together His Saints to Him; who have set His covenant before sacrifices…”

Jeff Ostrowski · December 2, 2015

Introit For The Immaculate Conception (8 December)

“Gaudens Gaudebo” is not a short Introit.

Jeff Ostrowski · December 1, 2015

The Most Important Thing A Choirmaster Can Do

Sometimes it takes decades to appreciate the genius of this or that Gregorian chant.

Jeff Ostrowski · November 30, 2015

Changing The Good Friday Prayer For The Jews

“Christianity is the perfect development of the Jewish religion…” —Fr. Leslie Rumble

Jeff Ostrowski · November 29, 2015

Musical Resources • First Sunday of Advent (Extraordinary Form)

“Arise in thy strength, we beseech thee, O Lord, and come…”

Jeff Ostrowski · November 27, 2015

Clarity Regarding The Pius XII “Turkey” Indult

Whether this rumor is accurate makes no difference, because the rules for Friday abstinence were changed in the 1960s.

Jeff Ostrowski · November 24, 2015

Our Church Music Movement: How Are We Doing?

I never dreamed that so many people love this stuff…and are willing to fight for it!

Jeff Ostrowski · November 19, 2015

PDF Download • Hymnal by Fr. John Selner (1954)

Some of the old Catholic hymnals were dreadful, but this one is splendid.

Jeff Ostrowski · November 18, 2015

PDF Download • “Liber Brevior” (1954)

This special Solesmes book contains another version of the “Chants Abrégés.”

Jeff Ostrowski · November 17, 2015

Sacred Music & Babies

What’s our end game?

Jeff Ostrowski · November 16, 2015

Solesmes is not infallible…

The accent on “adjúva” should be “ádjuva”

Jeff Ostrowski · November 11, 2015

Stunning New Collection Of English Propers

This book of organ accompaniments by John Ainslie covers every season, including ordinary time.

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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

“I, (Name), do declare that I do believe that there is not any Transubstantiation in the Sacrament of the Lord’s Supper, or in the elements of the bread and wine, at or after the consecration thereof by any person whatsoever.”

— ‘From England’s Anti-Catholic Oath (1673)’

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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.

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President’s Message (dated 30 May 2025)

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