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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

Huge Announcement! • “Three Voiced Polyphony”

Jeff Ostrowski · October 19, 2021

IFTEEN YEARS AGO, on the feast of Father John Brébeuf—19 October 2006—the Secretary of State granted us recognition as a 501(c)3 public charity in Texas. With gratitude to our Redeemer on our fifteenth anniversary, I’m thrilled to make a huge announcement. A magnificent collection we commissioned for three-part choirs (Soprano, Alto, Bass) can now be purchased directly from Amazon, and we have greatly reduced the price. Depending on how the psalm verses are sung—a decision left to each choirmaster—these pieces can be as long or short as necessary to match the liturgical action. If your choir has more females than males, this collection will thrill you—because all the pieces are written for SAB!

*  MATRI DIVINAE GRATIAE • Purchase this book!
$8.99 per copy • Eligible for Amazon Prime! • 44 pages.

Click here to download a sample page.

Contemporary Harmonies: Composer Kevin Allen has produced a true masterpiece, make no mistake about it. Some of these pieces are somber and stately. An example would be “Aufer A Me,” and observe how each voice enters on a different scale degree—a superb touch! One way to find out whether a composition is excellent is to take away one or more voices and examine the result. Mr. Allen’s creation certainly passes that test with flying colors, as you can see by listening to a version missing one voice (i.e. with one voice removed). The result is both interesting and pleasing. This is contemporary music, so the “RRR” (Rigid Renaissance Rules) are not followed…yet each voice is eminently singable—an absolute joy!

Rehearsal videos for each individual voice:
“Aufer A Me” • SOPRANO • ALTO • BASS

Small Groups: Some of the pieces are extremely bright—and the following example demonstrates that—and they are very “tuneful” or “catchy.” Once these pieces get into your head, they won’t leave! And that’s okay, because the sacred liturgy is supposed to be something in which we take delight. They sound very good sung by even a handful of singers. Below is a live recording from our 9:00am Sunday Mass—which is sung by a very small group of singers:

Large Groups: On the other hand, these piece sound absolutely spectacular when they are sung by a large group of singers. By the way, in terms of the layout (which includes solfège markings), few books compare in elegance to Matri Divinae Gratiae. Below is live recording from our 11:00am Sunday Mass—which is sung by a large group of volunteer singers:

Rehearsal videos for each individual voice:
“Quam Dilecta” • SOPRANO • ALTO • BASS

This 44-page collection contains:

1. QUAM DILECTA |+ Psalm verses
2. JUSTORUM ANIMAE |+ Psalm verses
3. ERIPE ME |+ Psalm verses
4. SI AMBULAVERO |+ Psalm verses
5. MEMENTO VERBI |+ Psalm verses
6. AUFER A ME + Psalm verses

Supporting The Composer: This collection was commissioned by CORPUS CHRISTI WATERSHED and published in September of 2016. In accordance with our customs, all proceeds which exceed production costs (printing, shipping, and so forth) go directly to the Catholic artist, who maintains copyright. Therefore, when you purchase these books, you are directly supporting Roman Catholic artists who produce works for the Church. We are a 100% volunteer organization.

Complete Title:   Matri Divinae Gratiae, Opus Mariae Dedicatum

Opinions by blog authors do not necessarily represent the views of Corpus Christi Watershed.

Filed Under: Articles, Featured Tagged With: 3-part SAB motets, Easy Polyphony For Amateurs, Matri Divinae Gratiae, Motets for Three-Part Choir, Polyphony For Three Voices Last Updated: October 25, 2021

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About Jeff Ostrowski

Jeff Ostrowski holds his B.M. in Music Theory from the University of Kansas (2004). He resides with his wife and children in Michigan. —(Read full biography).

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Corpus Christi Watershed

President’s Corner

    Music List • (2nd Sunday of Lent)
    Readers have expressed interest in seeing the ORDER OF MUSIC I created for this coming Sunday, which is the 2nd Sunday of Lent (1 March 2026). If such a thing interests you, feel free to download it as a PDF file. This feast has magnificent propers. Its somber INTROIT is particularly striking—using a haunting tonality—but the COMMUNION with its fauxbourdon verses is also quite remarkable. I encourage all the readers to visit the feasts website, where the Propria Missae may be downloaded completely free of charge.
    —Jeff Ostrowski
    Like! Like! Like!
    You won’t believe who recently gave us a “like” on the Corpus Christi Watershed FACEBOOK PAGE. Click here (PDF) to see who it was. We were not only sincerely honored, we were utterly flabbergasted. This was truly a resounding endorsement and unmistakable stamp of approval.
    —Jeff Ostrowski
    Which Mass?
    In 1905, when the Vatican Commission on Gregorian Chant began publishing the EDITIO VATICANA—still the Church’s official edition— they assigned different Masses to different types of feasts. However, they were careful to add a note (which began with the words “Qualislibet cantus hujus Ordinarii…”) making clear “chants from one Mass may be used together with those from others.” Sadly, I sometimes worked for TLM priests who weren’t fluent in Latin. As a result, they stubbornly insisted Mass settings were ‘assigned’ to different feasts and seasons (which is false). To understand the great variety, one should examine the 1904 KYRIALE of Dr. Peter Wagner. One should also look through Dom Mocquereau’s Liber Usualis (1904), in which the Masses are all mixed up. For instance, Gloria II in his book ended up being moved to the ‘ad libitum’ appendix in the EDITIO VATICANA.
    —Jeff Ostrowski

Quick Thoughts

    Extreme Unction
    Those who search Google for “CCCC MS 079” will discover high resolution images of a medieval Pontificale (“Cambridge, Corpus Christi College, MS 079”). One of the pages contains this absolutely gorgeous depiction of the Sacrament of Extreme Unction.
    —Corpus Christi Watershed
    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
    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

“There is no music worth hearing save that written in the last 40 years.”

— Johannes Tinctoris (1477)

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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.