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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

New! • Easy Choral Extension Mass (Ordinary Form)

Guest Author · January 3, 2017

509 Medieval Organist HAVE BEEN recently inspired by the principle of using choral extensions allowing both congregational participation and “a touch of polyphony,” as discussed in a previous post on Corpus Christi Watershed. I think it is a sound principle for those who are trying to find a balanced approach within the Ordinary Form, bring in beautiful elements of the Church’s polyphonic tradition, and increase the moments that we should have a little more reflection within the action of the Liturgy.

Practically speaking, a full polyphonic setting in the context of a regular Ordinary Form liturgy might seem a trifle long, when the action must stop to wait for it. In the heyday of sacred polyphony, and in the context of the Extraordinary Form of the Mass today, the liturgical action may continue during the choral singing of the Ordinary, with the celebrant reciting the texts at the altar sotto voce. This means that, sadly—and not intentionally—great works may be perceived to lose some of their functionality. This is where the principle of choral extensions may come in, where you still want this priceless treasure practically used in the Ordinary Form Mass.

    * *  PDF Download • MISSA MISERICODRIAE DEI (2017)

So, I have devised this Mass setting, which I’ve given the name Missa Misericordiae Dei (Mass of the Mercy of God), which incorporates the most common ICEL Roman Chants of the Kyrie, Sanctus, Memorial Acclamation, Great Amen, and Agnus Dei, with excerpts from the Missa Octavi Toni by Orlando de Lassus (for SATB). This allows for the congregation to join in with the “Chant” section of each of the parts and the choir to provide some polyphony either between or at the end of the section. I have provided the ICEL chants with a possible SATB choral harmonisation, to allow for them to be sung without organ accompaniment, as would seem to be more fitting in the penitential seasons of the year, particularly Advent and Lent. It would be, however, perfectly reasonable to ignore these harmonisations and sing the melodies in unison and break into the polyphony where it begins. The ICEL Chants are given in their English form. They could equally be sung in Latin, or any other language should that be desired or required.


We hope you enjoyed this guest article by Maestro McBain.


Nigel Lucas Silvester McBain currently serves as Director of Music and Adult Faith Formation at Holy Family Catholic Church, Mitchell, South Dakota.

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

Filed Under: Articles Tagged With: Choral Extensions Last Updated: November 25, 2025

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Corpus Christi Watershed

President’s Corner

    PDF Download • “Ubi Caritas” (SATB)
    I remember singing “Ubi Cáritas” by Maurice Duruflé at the conservatory. I was deeply moved by it. However, some feel Duruflé’s version isn’t suitable for small choirs since it’s written for 6 voices and the bass tessitura is quite low. That’s why I was absolutely thrilled to discover this “Ubi cáritas” (SATB) for smaller choirs by Énemond Moreau, who studied with OSCAR DEPUYDT (d. 1925), an orphan who became a towering figure of Catholic music. Depuydt’s students include: Flor Peeters (d. 1986); Monsignor Jules Van Nuffel (d. 1953); Arthur Meulemans (d. 1966); Monsignor Jules Vyverman (d. 1989); and Gustaaf Nees (d. 1965). Rehearsal videos for each individual voice await you at #19705. When I came across the astonishing English translation for “Ubi Cáritas” by Monsignor Ronald Knox—matching the Latin’s meter—I decided to add those lyrics as an option (for churches which have banned Latin). My wife and I made this recording to give you some idea how it sounds.
    —Jeff Ostrowski
    PDF • “Cantus Mariales” (192 pages)
    Andrea Leal has posted an absolutely pristine scan of CANTUS MARIALES (192 pages) which can be downloaded as a PDF file. To access this treasure, navigate to the frabjous article Andrea posted Monday. The file is being offered completely free of charge. The beginning pages of the book have something not to be missed: viz. a letter from Pope Saint Pius X to Dom Pothier, in which the pope calls Abbat Pothier “a man versed above all others in the science of liturgy, and to whom the cause of Gregorian chant is greatly indebted.”
    —Jeff Ostrowski
    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

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

Dom Vitry never claimed chant could not be used successfully with English words. No one need take my word for it. He was a pioneer on the matter of vernacular adaptation, and I need only refer you to the many publications of his own “Fides Jubilans” press. What he said was that adaptation involved some mutilation, and that we were faced with one or the other.

— Monsignor Francis P. Schmitt (1963)

Recent Posts

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  • PDF • “Cantus Mariales” (192 pages)
  • PDF Download • Fourteen (14) Versions of the Splendid Hymn: “Salve Mater Misericordiae”
  • Fulton J. Sheen • “24-Hour Catechism”
  • Music List • (2nd Sunday of Lent)

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