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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 · June 27, 2016

Wow! Take 35% off your purchase!

The Goupil Graduals arrived this morning, and they look marvelous!

Jeff Ostrowski · June 24, 2016

Los Angeles Pontifical Mass • This Coming Sunday!

We’ll be joined by Bishop Athanasius Schneider, our FSSP District Superior, and several FSSP seminarians for a Solemn Pontifical Mass in Hollywood.

Jeff Ostrowski · June 23, 2016

“I will fear no evils, for thou art with me.”

St. John Vianney was once overheard speaking directly to the Lord.

Jeff Ostrowski · June 22, 2016

Purchase Hard Copies of the Goupil Gradual

Eight reasons why every choirmaster needs this new resource.

Jeff Ostrowski · June 21, 2016

First Instance of “Alius Cantus Aptus”

“The current rubrics of the missal … specify the moments when the celebrant must turn toward the people.” —Cardinal Sarah, 23 May 2016

Jeff Ostrowski · June 20, 2016

“Vidimus Stellam Ejus In Oriente”

Who could deny the text painting here?

Jeff Ostrowski · June 19, 2016

Musical Resources • 5th Sunday after Pentecost

“O God, Who hast prepared good things unseen for them that love Thee…”

Jeff Ostrowski · June 18, 2016

Does the Mass Demand a Certain Level of Dignity?

I started asking myself how anyone could argue against something like this. After all, isn’t it good to share joy?

Jeff Ostrowski · June 15, 2016

Essential Resources • Psalm Tones for Mass Propers

“The singing of the Communion Antiphon alone, which sufficed at sung Mass when Holy Communion was not given, is insufficient under the new conditions…” —Solesmes (1957)

Jeff Ostrowski · June 14, 2016

New Gloria Mixing Plainsong w/ Polyphony

… composed by a Franciscan monk!

Jeff Ostrowski · June 14, 2016

Congregational Singing in the Year 1903

“The Ordinary of the Mass and the hymn at Vespers are the parts of Divine Service in which the congregation is supposed to join.” —Solesmes (1903)

Jeff Ostrowski · June 12, 2016

Musical Resources • 4th Sunday after Pentecost

“May the mysteries we have received purify us, we beseech Thee, O Lord…”

Jeff Ostrowski · June 9, 2016

Rehearsal Videos • Masterpiece w/ Cantus Firmus

Can you tell which voice is not mine?

Jeff Ostrowski · June 8, 2016

Jeff Ostrowski’s Symposium Talk • Released!

Title: “Fifty Tips For Training Amateur Choirs”

Jeff Ostrowski · May 24, 2016

O Salutaris Hostia • Do You Like This Version?

Download this 47-page booklet … and please pardon any typos!

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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 ask that future priests, from their time in the seminary, receive the preparation needed to understand and to celebrate Mass in Latin, and also to use Latin texts and execute Gregorian chant; nor should we forget that the faithful can be taught to recite the more common prayers in Latin, and also to sing parts of the liturgy to Gregorian chant.”

— Statement by the Supreme Pontiff (Sacramentum Caritatis, 22-feb-2007)

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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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