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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

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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President’s Corner

    PDF Download • “Organ Accompaniment”
    Over the past few years, I’ve been harmonizing all the vernacular plainsong Introit settings by the CHAUMONOT COMPOSERS GROUP. This coming Sunday—10 May 2026—is the 6th Sunday of Easter (Year A). The following declaration will probably smack of “blowing my own horn.” However, I’d rank this accompaniment as my best yet. In this rehearsal video, I attempt to sing it while simultaneously accompanying myself on the pipe organ. The musical score [for singers] as well as my organ accompaniment can be downloaded free of charge from the flourishing feasts website.
    —Jeff Ostrowski
    “Gregorian Chant Quiz” • 4 May 2026
    A few days ago, the CORPUS CHRISTI WATERSHED Facebook page posted this Gregorian Chant quiz regarding a rubric for the SEQUENCE for the feast of Corpus Christi: “Lauda Sion Salvatórem.” There is no audience more intelligent than ours—yet surprisingly nobody has been able to guess the rubric. Drop me an email with the right answer, and I’ll affirm your brilliance to everyone I encounter!
    —Jeff Ostrowski
    “Rare Photographs” • Hannibal Bugnini
    On 2 September 2025, we included in this article extremely rare photographs of Archbishop Hannibal Bugnini taken in Iran circa 1979. Bugnini had initially been banished by the pope to Uruguay, but he refused to obey. [This is interesting, since Bugnini relied upon ‘blind obedience’ when it came to modifications of the ancient liturgy.] After he refused to obey the order from the pope, Hannibal Bugnini was banished to Iran. You can also watch a short video of Hannibal Bugnini in Iran, dated 10 November 1979. That’s about a week after the USA embassy hostage crisis began in Tehran, and Pope Saint John Paul II had sent the leader of the Iranian Revolution a special letter.
    —Jeff Ostrowski

Quick Thoughts

    PDF Download • “Anima Christi”
    I received a request for an organ accompaniment I created way back in 2007 for the “Anima Christi” Gregorian Chant. You can download this PDF file which has the score in plainsong followed by a keyboard accompaniment. Many melodies have been paired with “Anima Christi” over the centuries, but this is—perhaps—the most common one.
    —Jeff Ostrowski
    PDF • “Liturgical Law” (467 Pages)
    On Good Friday during the middle ages, the pope privately recited THE ENTIRE PSALTER. If you don’t believe me, see for yourself by reading this passage by Dom Charles Augustine Bachofen (d. 1943). His famous book—called “Liturgical Law: A Handbook Of The Roman Liturgy”—was published by the Benjamin Herder Book Company, which was the American arm (operating out of St. Louis, Missouri) of one of the world’s most significant Catholic publishers. Dom Charles Augustine Bachofen was born in Switzerland but spent his career between the Benedictine monasteries at Conception (Missouri) and Mount Angel (Oregon). His 1931 masterpiece, Liturgical Law can be downloaded as a PDF file … 467 pages!
    —Jeff Ostrowski
    “Gregorian Chant Quiz” • 24 March 2026
    How well do you know your Gregorian hymns? Do you recognize the tune inserted into the bass line on this score? For many years, we sang the entire Mass in Gregorian chant—and I mean everything. As a result, it would be difficult to find a Gregorian hymn I don’t recognize instantly. Only decades later did I realize (with sadness) that this skill cannot be ‘monetized’… This particular melody is used for a very famous Gregorian hymn, printed in the LIBER USUALIS. Do you recognize it? Send me an email with the correct words, and I promise to tell everybody I meet about your prowess!
    —Jeff Ostrowski

Random Quote

When we say: “The people like this” we regard them as unable to develop, as animals rather than human beings, and we simply neglect our duties in helping them towards a true human existence — indeed, in this case, to truly Christian existence.

— Professor László Dobszay (2003)

Recent Posts

  • PDF Download • “Organ Accompaniment”
  • “Gregorian Chant Quiz” • 4 May 2026
  • “Rare Photographs” • Hannibal Bugnini
  • “Regina Caeli” • More Than You Wanted To Know
  • Music List • “5th Sunday of Easter” (Year A)

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