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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

    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

    “Reminder” — Month of May (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. It couldn’t be easier to subscribe! Just scroll to the bottom of any blog article and enter your email address.
    —Jeff Ostrowski
    Simplified Version • “Canon in D” (Pachelbel)
    I published an article on 11 November 2023 called Wedding March For The Lazy Organist, which rather offhandedly made reference to a simplified version I created in 2007 for Pachelbel’s Canon. I often use it as a PROCESSIONAL for weddings and quinceañeras. Many organists say they “hate” Pachelbel’s Canon. But I love it. I think it’s bright and beautiful. I created that ‘simplified version’ for musicians coming to grips with playing the pipe organ. It can be downloaded as a free PDF if you visit Andrea Leal’s article dated 15 August 2022: Manuals Only: Organ Interludes Based on Plainsong. Specifically, it is page 84 in that collection—generously offered as a free PDF download. Johann Pachelbel (d. 1706) was a renowned German organist, violinist, teacher, and composer of over 500 works. A friend of Bach’s family, he taught Johann Christoph Bach (Sebastian Bach’s eldest brother) and lived in his house. Those who read Pachelbel’s biography will notice his connection to two German cities adopted as famous hymn tune names: EISENACH and ERFURT.
    —Jeff Ostrowski
    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

Random Quote

“The chants of the Proper of the Mass—that is, the Introit, Gradual, Offertory, Communion—in sung Masses may be chanted in the vernacular to melodies legitimately approved.”

— Statement (20 April 1964) by the Consilium, the group Paul VI put in charge of inventing the New Mass

Recent Posts

  • “Reminder” — Month of May (2026)
  • “Englished” Gregorian Chant • 5 Considerations
  • Simplified Version • “Canon in D” (Pachelbel)
  • PDF Download • “Organ Accompaniment”
  • “Gregorian Chant Quiz” • 4 May 2026

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