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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

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Jeff Ostrowski · October 22, 2024

“Entrance Chant” for Sunday (27-Oct-2024)

This one was put in a “brighter” mode—owing to its text—based on the somewhat peculiar place the original came from.

Jeff Ostrowski · October 20, 2024

Music List • (29th Sund. Ordinary Time)

Readers have expressed interest in looking over the “music list” I’ve prepared for this coming Sunday.

Jeff Ostrowski · October 19, 2024

PDF Download • “Extremely Rare Biography!” — Raphael Cardinal Merry Del Val (272 Pages)

I’ve been patiently waiting to release this since the summer!

Jeff Ostrowski · October 15, 2024

“This Change Blew My Mind” • Confusion: Is 9 December 2024 a Holy Day of Obligation?

I just got off the phone with a very high ranking official at the USCCB…

Jeff Ostrowski · October 15, 2024

“Entrance Chant” • For Sunday (20-Oct-2024)

This one’s in Mode 3, imitating the authentic Gregorian chant.

Jeff Ostrowski · October 15, 2024

PDF Download • “Entrance Chant in English” (29th Sunday in Ordinary Time)

With a digression on a 1971 film called “Fiddler on the Roof.”

Jeff Ostrowski · October 11, 2024

Music List • (28th Sund. Ordinary Time)

Readers have expressed interest in looking over the “music list” I’ve prepared for this coming Sunday.

Jeff Ostrowski · October 10, 2024

PDF Download • “Entrance Chant in English” for the 28th Sunday in Ordinary Time (Year B)

This coming Sunday—13 October 2024—is the 28th in Ordinary Time.

Jeff Ostrowski · October 9, 2024

“Entrance Chant” • For Sunday (13-Oct-2024)

This one’s in Mode 3, imitating the authentic Gregorian chant.

Jeff Ostrowski · October 5, 2024

“In Feriis Per Annum” • Kýrie Eléison

For years I’d been meaning to harmonize the famous KYRIE SIMPLEX—but I never got the opportunity until today. Feel free to download the PDF score if you wish. It is “Kyrie XVI,” which in the old books bore the title In Feriis Per Annum.

Veronica Brandt · October 4, 2024

PDF Download • “Vexilla Regis” in 3 or 4 parts, alternating chant & polyphony

A lovely and practical piece with fantastic safety features for any time adoring the Cross of Jesus.

Follow the Discussion on Facebook

Jeff Ostrowski · October 2, 2024

English Plainchant Revival • “Is It Real?”

Let Busoni’s statement serve as a reminder to Catholic music directors everywhere.

Jeff Ostrowski · October 1, 2024

“Entrance Chant” • For Sunday (6-Oct-2024)

This one’s in Mode 4, imitating in an admirable way the authentic Gregorian chant.

Jeff Ostrowski · September 30, 2024

You Forgot About This One!

I’d be interested to see the actual citations for this…

Jeff Ostrowski · September 29, 2024

An Anglican “Mess”

If I live to be 100 years old, there’s something I’ll never understand.

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Corpus Christi Watershed

President’s Corner

    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
    PDF Download • “Hymn for 2 Voices”
    Readers who click on this video will see that it starts with verses of the “Pange Lingua” hymn by Saint Thomas Aquinas (d. 1274) arranged for two voices. However, there’s a polyphonic refrain (“Tantum Ergo”) for three voices, taken from Kevin Allen’s Motecta Trium Vocum. If your choir is very small, this piece is for you! You can download the PDF score free of charge—and you can also utilize the rehearsal videos for each individual voice—by navigating yourself to #20323.
    —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

“The sacrificial death of Jesus Christ the High Priest on Calvary is and will remain the basis for the active participation of the faithful in the liturgy. Membership in the Church, which is brought about by valid baptism, makes one a part of the Mystical Body of Christ, THE PRIEST, to whose priesthood one is interiorly conformed through the baptismal character.”

— “Divini Cultus Studium” (Dr. Robert A. Skeris, 1990)

Recent Posts

  • Dom Pothier • Photo from 1904
  • PDF Chart • “Plainsong Rhythm”
  • PDF • “3-Voice Motet” (Father De Laet)
  • PDF Download • “Hymn for 2 Voices”
  • (January 2026) • “Children Singing Plainsong”

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