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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

PDF Download

Jeff Ostrowski · December 30, 2019

PDF Accompaniment • “Jesu Redemptor Omnium”

You can compare my accompaniment to that of Achille P. Bragers.

Jeff Ostrowski · December 10, 2019

PDF • “Veni Veni Emmanuel” (2 Voices + Organ)

Download this PDF score—free to all—and sing during Advent!

Andrea Leal · November 21, 2019

PDF Download • “Erunt Signa In Sole” (Advent)

“One of the challenges of a small choir is having enough singers to pull off any kind of polyphony. ” —Andrea Leal

Jeff Ostrowski · November 8, 2019

PDF Download • A Eucharistic Piece My Choir Loves

Including a “preview” of the forthcoming Brébeuf Hymnal SATB Choral Supplement.

Jeff Ostrowski · October 19, 2019

PDF Download • Palestrina Kyrie (Part 2 of 3)

“Dazzlingly luscious” is probably best way to describe this Mass.

Jeff Ostrowski · October 7, 2019

PDF Download • SATB “Sanctus” by Orlando de Lassus

We have completed part 1. When part 2 is finished, we’ll release that, as well.

Jeff Ostrowski · September 20, 2019

PDF Download • Palestrina Kyrie “Fons Bonitatis”

This is part 1 of 3 — and the other parts will be released soon.

Jeff Ostrowski · September 10, 2019

PDF Download • “Alleluia Choral Extension” (EF + OF)

This may look simple on paper, but it sounds *incredible* when sung by a full choir. Guerrero rocks!

Fr. David Friel · September 8, 2019

PDF Download • Chant Notation—Nuptial Blessing (EF)

With permission from the CDF, the nuptial blessing at a sung EF Mass may be chanted according to this melody.

Jeff Ostrowski · September 2, 2019

PDF Download • Handy Solfège Chart (Printable)

I have no idea whether this will be of use to anyone, but here it is…

Jeff Ostrowski · August 1, 2019

PDF Download • “Sanctus For Two Voices”

“In general, it is better to do something well, however modest, than to attempt something on a grander scale if proper means are lacking.” —Pope Pius XII

Veronica Moreno · July 16, 2019

PDF Download • “Seasonal Index” (Brébeuf Hymnal)

I can’t always recognize a hymn tune by its name, especially when the Missalette only provides lyrics. Please don’t judge me; that’s the honest truth.

Jeff Ostrowski · June 12, 2019

PDF Download • Symposium Booklet (159 pages)

…probably unlike any musical booklet you’ve come across!

Jeff Ostrowski · June 10, 2019

PDF Download • Vespers Organ Accompaniments

Do you understand why some of the harmonies are blank?

Jeff Ostrowski · June 4, 2019

PDF Download • “Magnificat” + Rehearsal Videos!

“You think I’m kidding, but I’m not. I know of no greater piece than this.” —Jeff Ostrowski

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Corpus Christi Watershed

President’s Corner

    💲 5.00 💵
    Our tiny 501(c)3 nonprofit organization exists solely by generous readers who donate $5.00 per month. We have no endowment; we have no major donors; we run no advertisements; we have no savings. A donor wrote to us: “I so appreciate all you do and have done, and your generosity is unprecedented. I am honored to be able to make a monthly contribution.” Another monthly donor says: “Thank you for everything CC Watershed does. We are able to add so much solemnity to Holy Mass due to the resources made available here.” Can you spare a few dollars each month to help us survive?
    —Corpus Christi Watershed
    Dom Pothier • Photo from 1904
    Dom Paul Cagin, in a 1904 publication (L’oeuvre de Solesmes dans la restauration du chant grégorien) made sure to include a beautiful image of Dom Pothier, the legendary abbot of St-Wandrille. Also shown is a very young Dom André Mocquereau. Auguste Pécoul—considered the spiritual “son” of Abbat Prosper Guéranger of Solesmes—wrote as follows on 24 June 1901: “To forestall any confusion, let us remember that there is just one Gregorian notation—that restored, according to the ancient manuscripts, by the eminent Abbot of Saint-Wandrille, Dom Pothier.” ✠
    —Jeff Ostrowski
    PDF • “3-Voice Motet” (Father De Laet)
    I believe 99% of our readers will recognize this hymn tune. Perhaps Father Edgard De Laet should have called it a ‘hymn’ instead of a ‘motet for three voices’—but he’s technically correct, since MOTET is defined as: “a short piece of sacred choral music, typically polyphonic and unaccompanied.” The even verses are for three voices, as you will see if you download the PDF score at #20245. The odd verses may be song a cappella SATB or unison with organ.
    —Jeff Ostrowski

Quick Thoughts

    PDF Chart • “Plainsong Rhythm”
    I will go to my grave without understanding the lack of curiosity so many people have about the rhythmic modifications made by Dom André Mocquereau. For example, how can someone examine this single sheet comparison chart and at a minimum not be curious about the differences? Dom Mocquereau basically creates a LONG-SHORT LONG-SHORT rhythmic pattern—in spite of enormous and overwhelming manuscript evidence to the contrary. That’s why some scholars referred to his method as “Neo-Mensuralist” or “Neo-Mensuralism.”
    —Jeff Ostrowski
    “Reminder” — Month of January (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. Signing up couldn’t be easier: simply scroll to the bottom of any blog article and enter your email address.
    —Jeff Ostrowski
    PDF • “O Come All Ye Faithful” (Simplified)
    I admire the harmonization of “Adeste Fideles” by David Willcocks (d. 2015), who served as director of the Royal College of Music (London, England). In 2025, I was challenged to create a simplified arrangement for organists incapable of playing the authentic version at tempo. The result was this simplified keyboard arrangement (PDF download) based on the David Willcocks version of “O Come All Ye Faithful.” Feel free to play through it and let me know what you think.
    —Jeff Ostrowski

Random Quote

“Ordained a diocesan priest on 7 October 1827, Guéranger was quickly named a canon (a member of the cathedral chapter of Tours). Around 1830, he demonstrated his interest in the liturgy when he began to use the Roman Missal and texts for the Divine Office, unlike many of his colleagues, who still made use of the diocesan editions commonly in use in pre-Revolutionary France.”

— Source unknown

Recent Posts

  • 💲 5.00 💵
  • Dom Pothier • Photo from 1904
  • PDF Chart • “Plainsong Rhythm”
  • PDF • “3-Voice Motet” (Father De Laet)
  • PDF Download • “Hymn for 2 Voices”

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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.