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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 · March 20, 2017

PDF Download • Booklet for St. Joseph (19 March)

The absolute best method for choosing starting pitches…

Jeff Ostrowski · March 6, 2017

PDF Download • “Antiphonale Romanum” (1949)

Yesterday, I used the text on page 366 to create an SATB Hymn for Lent.

Jeff Ostrowski · February 21, 2017

PDF Download • “Cantus Varii” (469 Pages)

The revolution continues!

Jeff Ostrowski · January 26, 2017

PDF Download • “Sing the Angelus” (Plainchant)

Can you think of a better way to begin your choir rehearsals?

Jeff Ostrowski · January 6, 2017

PDF Download • Epiphany Booklet (FSSP.la)

To match the ancient acrostic, Erasmus changed the first line to “Herodis Hostes.”

Andrew Leung · January 5, 2017

PDF Download • “Missa de Angelis” (Fr. Castro)

Fr. Áureo Castro’s setting alternates the chant melody and the choral parts.

Jeff Ostrowski · December 10, 2016

PDF Download • “Rorate Mass” Booklet

Including a video snippet taken in Los Angeles.

Jeff Ostrowski · December 8, 2016

PDF Download • Immac. Conception Music Booklet

Make sure to read the translation of the Offertory Hymn—so gorgeous!

Andrew Leung · November 24, 2016

Free Download • Simple Choral Midnight Mass Introit

A simple setting of “Dominus Dixit ad Me” by Fr. Áureo Castro.

Jeff Ostrowski · November 23, 2016

PDF Download • “Ordo Missæ” As We Use It

Do you provide something similar for your choirs?

Guest Author · October 27, 2016

PDF Download • “Mass of the Alabaster Jar” (2016)

These settings were written to be easily played by pianists and organists of an intermediate skill level.

Jeff Ostrowski · October 24, 2016

PDF Download • Rare Hymnal by Organist at the Birmingham Oratory (1913)

Download all 572 pages—thanks to Peter Meggison!

Jeff Ostrowski · October 18, 2016

Palestrina • Jaw-Dropping “Kyrie” based on a Hymn

Two generous young ladies, currently in high school, helped me record this gorgeous Kyrie.

Jeff Ostrowski · July 20, 2016

PDF Download • St. Cecilia Hymnal (1937)

Like all the books we release, this extremely rare hymnal was previously unavailable until we scanned and uploaded it.

Andrew Leung · April 7, 2016

Free Downloads • Works by Cardinal Bartolucci (Part 2)

More choral works by Cardinal Bartolucci are available on the Domenico Bartolucci Foundation website.

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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

“We went to the early Mass to receive Communion because there was no distribution of Communion at the High Mass. After Mass was the breakfast, which was always of better quality than on ordinary days. Then after the breakfast we all returned to church for the Solemn Mass.”

— Dom Ermin Vitry, OSB

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.