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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 Curious Rhythmic Detail in Tomorrow’s Jubilus

Dr. Charles Weaver · May 7, 2022

HOSE MUSICIANS who sing for Masses following the 1974 Graduale Romanum will sing Alleluia Ego sum Pastor bonus tomorrow, for Good Shepherd Sunday. This alleluia was not sung this year by those choirs following the 1962 calendar, since the Sunday was replaced by the feast of St. Joseph the Worker. In some of its melismata, this melody has a recurring feature that is extremely rare: a horizontal episema over a non-ictic note, shown in the boxes below:

Click here if you cannot see the image.

Doesn’t this seem like a needless complication of a simple melody? You may have good reason to ignore the Solesmes markings. These various dots and lines form no part of the official Editio Vaticana, and they are out of favor among semiologists and mensuralists as well. What is the point of all these ictus and episemata then? If you want to know why I think the Solesmes theory is worth your consideration, you should come to the Sacred Music Symposium. For the moment, let’s just assume that your choir is trying to follow the Solesmes system (since many people still sing from these editions). What are we to make of this strange notation? In this post, I will try to give a musically satisfying answer to this question.

Most of the time, the horizontal episema aligns with the rhythmic ictus. It seems natural that the F of the last clivis get both the length (as indicated by the episema) and the rhythmic ictus, to avoid a sense of syncopation. In that case, both notes of the clivis would be ictic and long, so why is the music written the way it is, rather than as shown below?

Let’s analyze this alternative version from the perspective of rhythm. This passage consists of three neumes, each of which contains multiple composite pulses or beats. Remember that these “beats,” which the Solesmes method marks with the ictus, have nothing of emphasis about them, but are merely a way to organize the melody mentally. The beats (and the ictus) should never be heard by the listener. The first neume is a pes subbipunctis containing three triplex composite pulses (arsis–thesis–thesis). The second is a scandicus subbipunctis containing a duplex composite pulse followed by a triplex composite pulse. The second ictus falls naturally on the virga that is the melodic climax of this neume. The third neume is a clivis, in which both notes receive the dot of the mora vocis. The first and third neumes are rhythmic neumes (that is, they are self-contained, with final notes featuring the mora vocis), while the second neume links to the third by juxtaposition. This version is simpler and in fact more in line with the official rhythm of the Editio Vaticana, but it also gives (to my ear) too much weight to the final cadence. Dom Mocquereau suggests that such cadences (two double-length notes on a podatus or clivis) are reserved for larger phrase units, but they do occasionally occur in small phrases: see Alleluia Non vos relinquam.

The Solesmes version of this passage has a bit more nuance and interest. To see what I mean, consider the melody as given in the Solesmes books, but this time imagine it without the horizontal episema:

Mocquereau marks the ictus on the last diamond-shaped note because of a notation in the St. Gall manuscripts, since in at least one source of this figure this note is shown as a tractulus rather than a punctum. Such an interpretation will surely run afoul of the work of more recent semiologists. Let’s ignore the question of historicity for the moment and just consider the text in front of us. The effect of this ictus mark is to change the way the second neume connects to the third. Now these neumes are joined by linking rather than mere juxtaposition, and they form a larger compound rhythm (arsis–arsis–thesis–thesis). This is a very satisfying group to sing, with a slight acceleration toward the climactic virga and a gentle relaxation thereafter.

Once you are used to singing it this way, add the episema back in, remembering that it does not amount to a doubling of the note value, but gives a certain shade of nuance or emphasis to this note.

Now the F at the beginning of the last clivis does not feel like the goal of the melody, as it invariably did in our alternative version. Rather, its off-ictic character means that it has a certain slight liveliness, but its off-beat placement means that it is merely a slight interruption of the modal melodic motion from E to D. It is like a somewhat emphasized escape tone, to put it in modern terms.

None of this analysis is necessary to singing this chant beautifully. But if you choose to adopt the Solesmes approach, such detailed work can only improve your singing of it, as it makes us attend to the shape of the phrase as a whole. We do not want to fall into the fault of blindly doubling every episema, treating all the long notes as the same. To me, this kind of nuance is particularly fruitful, especially when we remember to put it in spiritual terms. The schola will sing this little rhythmic figure some eight times over the course of the chant (alleluia, twice in the verse, repetition of alleluia), and in each case the figure occurs in a part of the melody that lies beyond words, in the pure “singing with jubilation” that is the hallmark of the alleluiatic verses. Without the word accent to guide us, this quirky Solesmes rhythm gives us something on which to hang our jubilation.

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

Filed Under: Articles Tagged With: Dom Mocquereau, Solesmes Abbey Rhythm Last Updated: May 26, 2022

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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

    Why A “Fugue” Here?
    I believe I know why this plainsong harmonizer created a tiny fugue as the INTRODUCTION to his accompaniment. Take a look (PDF) and tell me your thoughts about what he did on the feast of the Flight of Our Lord Jesus Christ into Egypt (17 February). And now I must go because “tempus fugit” as they say!
    —Jeff Ostrowski
    New Bulletin Article • “12 October 2025”
    My pastor requested that I write short articles each week for our parish bulletin. Those responsible for preparing similar write-ups may find a bit of inspiration in these brief columns. The latest article (dated 12 October 2025) talks about an ‘irony’ or ‘paradox’ regarding the 1960s switch to a wider use (amplior locus) of vernacular in the liturgy.
    —Jeff Ostrowski
    “Reminder” — Month of October (2025)
    Those who don’t sign up for our free EMAIL NEWSLETTER miss important notifications. Last week, for example, I sent a message about this job opening for a music director paying $65,000 per year plus benefits (plus weddings & funerals). Notice the job description says: “our vision for sacred music is to move from singing at Mass to truly singing the Mass wherein … especially the propers, ordinaries, and dialogues are given their proper place.” Signing up couldn’t be easier: simply scroll to the bottom of any blog article and enter your email address.
    —Jeff Ostrowski

Quick Thoughts

    “American Catholic Hymnal” (1991)
    The American Catholic Hymnal, with IMPRIMATUR granted (25 April 1991) by the Archdiocese of Chicago, is like a compendium of every horrible idea from the 1980s. Imagine being forced to stand all through Communion (even afterwards) when those self-same ‘enlightened’ liturgists moved the SEQUENCE before the Alleluia to make sure congregations wouldn’t have to stand during it. (Even worse, everything about the SEQUENCE—including its name—means it should follow the Alleluia.) And imagine endlessly repeating “Alleluia” during Holy Communion at every single Mass. It was all part of an effort to convince people that Holy Communion was historically a procession (which it wasn’t).
    —Jeff Ostrowski
    “Canonic” • Ralph Vaughan Williams
    Fifty years ago, Dr. Theodore Marier made available this clever arrangement (PDF) of “Come down, O love divine” by P. R. Dietterich. The melody was composed in 1906 by Ralph Vaughan Williams (d. 1958) and named in honor of of his birthplace: DOWN AMPNEY. The arrangement isn’t a strict canon, but it does remind one of a canon since the pipe organ employs “points of imitation.” The melody and text are #709 in the Brébeuf Catholic Hymnal.
    —Jeff Ostrowski
    Did they simplify these hymn harmonies?
    Choirs love to sing the famous & splendid tune called “INNSBRUCK.” Looking through a (Roman Catholic) German hymnal printed in 1952, I discovered what appears to be a simplified version of that hymn. In other words, their harmonization is much less complex than the version found in the Saint Jean de Brébeuf Hymnal (which is suitable for singing by SATB choir). Please download their 1952 harmonization (PDF) and let me know your thoughts. I really like the groovy Germanic INTRODUCTION they added.
    —Jeff Ostrowski

Random Quote

“By a decree of the synod of the diocese of Exeter in 1284, no one should claim any seat in a church; but whoever first entered a church for the purpose of devotion, might choose at his pleasure a place for praying.”

— A work by Fr. Husenbeth (d. 1872)

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