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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 3, 2024

PDF Download • Pristine Scan: Father Mathias’ 1905 Kyriale Organ Accompaniment (186 pages)

Father Mathias served as organist for Strasburg Cathedral, where he founded the “Saint Leo Institute for Church Music” in 1913.

Jeff Ostrowski · December 3, 2024

Organ Accompaniment • “Kyrie IV”

This was inspired by Florentinus Peeters (d. 1986).

Jeff Ostrowski · December 2, 2024

“Promptly, Firmly, & Persistently Repressed.”

The book is called: “Cantica Sacra: Hymns for the children of the Catholic Church.”

Jeff Ostrowski · December 2, 2024

Which Gospel Acclamations?

Some have asked which version…

Jeff Ostrowski · November 26, 2024

“Entrance Chant” • Immaculate Conception

This Introit is in mode iii, which some consider the most beautiful.

Jeff Ostrowski · November 26, 2024

PDF Download • “Entrance Chant” for the Feast of the Immaculate Conception (8 December)

What is he talking about? Where can I go to hear these “aesthetically superior” interpretations? Where can they be found?

Jeff Ostrowski · November 22, 2024

“Music List” • (Christ the King Sunday)

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

Jeff Ostrowski · November 20, 2024

PDF Download • “Entrance Chant” for this Coming Sunday (Christ the King) — 34th in Ordinary Time

Including three separate points on Dom Combe’s shameful and defamatory statement.

Jeff Ostrowski · November 19, 2024

“Entrance Chant” • Christ the King

The feast of Christ the King—a completely modern feast—was added in 1925.

Jeff Ostrowski · November 16, 2024

“Music List” • (33rd Sund. Ordinary Time)

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

Jeff Ostrowski · November 14, 2024

PDF • SATB Enhancement (“Our Father”)

“As the congregation sings their part, the choir “enhances” them with polyphony. This is genius!” — Veronica Moreno

Richard J. Clark · November 14, 2024

PDF Download • “Put Out into the Deep”

“His appointment was somewhat unexpected as he was installed as Bishop of Providence in May of 2023.” — Richard J. Clark

Veronica Moreno · November 13, 2024

PDF Download • “Polyphonic Enhancement” for the Lord’s Prayer (Mass in English)

As the congregation sings their part, the choir “enhances” them with polyphony. This is genius!

Jeff Ostrowski · November 12, 2024

PDF Download • “Entrance Chant” for this Coming Sunday (33rd Sunday in Ordinary Time)

The sixth mode is sometimes the “peaceful” mode.

Jeff Ostrowski · November 12, 2024

“Entrance Chant” • Sunday (17 Nov. 2024)

This Introit is in the sixth mode (known as the “peaceful” mode).

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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

“In chronological order, [Dom Pierre Combe] traces the Gregorian reform from its beginnings under Dom Guéranger in 1833, to the problems of the Vatican Commission on Sacred Music in the first decade of the 20th century. As one reads the topic headings and development of their content, one wonders how such an innocent and un-warlike subject such as Gregorian chant could have been the focal point of such an intense and continuing battle among scholars and churchmen for so many decades.”

— Dr. Theodore Marier (1968)

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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