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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

“Easy Polyphonic Agnus Dei” • Part 3 of 3

Jeff Ostrowski · September 24, 2021

HERE ARE, OF COURSE, numerous reasons authentic Catholic music has not been universally embraced (yet). One reason is difficult for some to accept: polyphony is frequently sung badly—with unbalanced voices, improper vowels, poor tuning, and so forth. The ability to sight-read music instantly does not guarantee a good performance. Choirs must sing polyphony multiple times before the harmonies “click.” Often, a performance can be greatly improved by simply shuffling your singers around. 1

Piecemeal Polyphony: Here in Los Angeles, we take advantage of a solution called “piecemeal polyphony.” I’ve spoken of this before; it means when we sing a polyphonic KYRIE ELEYSON, we begin by singing the third section (which is usually the hardest), mixing with plainsong in an ABA structure. Then we add the “Christe” section. Finally, we add the first section—and the piece is complete.

Bookmark This Link: Today, I am thrilled to release “Part 3 of 3” for a simple polyphonic setting of the AGNUS DEI. You will want to bookmark this URL, where you can easily access all three sections.

If you want to see a “Piecemeal Kyrie,” you can click here.

Here’s the final section:

*  PDF Download • AGNUS DEI (“Part 3 of 3”)
—The 2nd and 3rd sections are by Father Guerrero, the 1st by Nanino.

Rehearsal videos for each individual voice await you at #59013.

Deep Sadness: My soul is sad because most readers will not click on that 59013 link. As a result, they will miss out on the rehearsal videos for each individual voice; and those are very helpful for volunteer choirs! Mark my words: most readers will not explore that link—which fills me with gloom.


NOTES FROM THIS ARTICLE:

1   This is often called “Doctor James Daugherty’s Solution.” It consists of spending hours shuffling your singers, finding out which voices sound good standing next to one another. Shifting “John Doe” from the left side of someone to his right side can instantly make a tremendous difference—but, of course, this requires time and effort.

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

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Filed Under: Articles, Featured, PDF Download Tagged With: Francisco Guerrero Composer, Piecemeal Agnus Dei, Piecemeal Polyphony, Simple Polyphony Last Updated: February 26, 2022

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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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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 chapter orders that only grandees (and their immediate relatives), counts, marquises, and provincial governors may in future enter the choir enclosure during divine service: such a restriction being imposed so that quiet can be the better maintained during cathedral solemnities.” [From “The Life of Father Francisco Guerrero.”]

— Sevilla: Chapter Resolution (25 May 1558)

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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