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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

A Classic Example of Modal Modulation

Dr. Charles Weaver · November 12, 2023

A FEW MONTHS AGO, I wrote a post about a traditional and brief way of formulating the ethos or character associated with each of the eight modes. If you apply this way of thinking to your chanting, it can often bear a great deal of fruit for contemplation. It provides another dimension for us to think about as we approach a chant: liturgical context and meaning, melody, text setting, mode. In particular, I would like to suggest that you might get something out of adopting a dynamic rather than a static way of thinking about the modes.

Here is what I mean by a static way. What we teach our students is that we classify a melody into one of the modes by looking at its final and its range. The final is the last note of the melody, and it works like this: D is for modes 1 and 2; E is for modes 3 and 4; F is for modes 5 and 6; G is for modes 7 and 8. If a chant ends on another note, we consider it as being in a transposed version of one of the other modes. Typically C endings are mode 5, A endings are mode 2, and B endings are mode 4. The range refers to whether the final note is near the bottom of the range of pitches in the melody or somewhere in the middle. Near the bottom means an odd-numbered mode, while in the middle means an even-numbered mode. This is not really an exact science, but after spending a while with the melodies you get pretty confortable categorizing them.

In a dynamic way of thinking about the modes, we add on to what I wrote above by thinking of the modes as also having certain typical melodic patterns and certain notes that seem to anchor the mode. Often these are the same as the tenor or reciting tone of the psalm. Sometimes these are other notes, like the pitch F in the Easter introit. Sometimes a melody can visit other modes by adopting the melodic mannerisms of that mode. If you combine that with the modal ethos, you can sometimes get some real analytical insight. I know that sounds like dry theory, but I think it can be rewarding for any choir director to think this way!

A very clear example of this happened today at the communion in the ordinary form. The communion sets an excerpt from today’s gospel about the wise and foolish virgins. As usual, the Gregorian author did a great job of paraphrasing the gospel text to make a coherent and beautiful antiphon focused on one important aspect from the gospel lesson. That could be the basis for a whole other post. Anyway, the melody also moves between modes in an interesting way. First off, we have this phrase:

The antiphon is in mode 5, but if we single out this phrase, we are most certainly in mode 6, which is the mode of devotion. How fitting for the prudent virgins, who keep their vessels full of oil against the bridegroom’s coming—a praiseworthy act of devotion! When the cry comes announcing the coming of the bridegroom, it bursts forth into the fifth mode, the mode of joy:

This sudden rise up to the high E makes a really startling effect in context. As a depiction of the Lord’s coming, it it reminiscent of the image of the lightning coming from the east to the west.

Finally, we get a rather unusual (for a communion chant) melodic repetition, but with a new continuation:

On the command “go out,” the melody also goes outside of its previous limits, finding a new peak on the high F. Of course we don’t really think about chants in tonal terms, but the Schenkerian in me can’t help hearing this F as a long-term resolution to the high E in the previous phrase. If you’d rather think about this in a more historical way, we can think of the pointed character of the La on which we would sing the E in the solmization system, which finds some resolution in finally attaining the softness of the fa (F) above. Toward the cadence, the melody on the ending of “Christo” is also reminiscent of one of the formulaic phrases from fifth-mode graduals.

These are some tentative, sketchy beginnings of an analysis that occurred to me today while singing. Do you find the move from the mode of devotion to the mode of joy suggestive? For me, this kind of thinking helps me to shape the melody in my own singing.

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

Filed Under: Articles Last Updated: November 13, 2023

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About Dr. Charles Weaver

Dr. Charles Weaver is on the faculty of the Juilliard School, and serves as director of music for St. Mary’s Church. He lives in Connecticut with his wife and four children.—(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

“We have baptized about 240 this year … All the labors of a million persons—would they not be worthwhile if they gained one single soul for Jesus Christ?”

— Father Isaac Jogues, writing to his mother

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