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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

PDF Download • “Credo III + Polyphonic Extension”

Jeff Ostrowski · January 17, 2024

OR MANY YEARS, I had no idea how to use the Gregorio software (a.k.a. “GABC”) to instantly create plainsong scores on the computer. When I couldn’t take it anymore, I called up a friend and paid him $150 to teach me over the telephone. I was able to learn only with assistance from a living, breathing human being. Thanks to his assistance, I can now create Gregorian Chant scores with ease. That $150 was not wasted. Some things in life (in my humble opinion) cannot be learned from books—and that’s why I recently recorded a special seminar: Secrets of the Conscientious Choirmaster.

Contrafactum • Nothing is hard if you know how to do it. Men who spent their entire lives tinkering with automobiles and tractors have no problem repairing cars—because they know what to do! In my seminar, I give away secrets I’ve picked up over the last 25 years (working with hundreds of singers across the United States). One technique I really “hammer” or “emphasize” or “highlight” is that of CONTRAFACTUM. I don’t see how anyone could run a choral program without it. Mozart used it. Handel used it. Bach used it. Even Father Cristóbal de Morales (d. 1553) used CONTRAFACTUM when he wrote alternate movements for his magnificent Missa Mille Regretz.

Choral Extensions • I also delve into the concept of “choral extensions” during my seminar. To give you an example, yesterday afternoon I quickly threw together—thanks to the Missa Mille Regretz by Father Cristóbal de Morales—a “polyphonic extension” using CREDO III:

*  PDF Download • “CREDO III + Polyphonic Extension”
—Using Missa Mille Regretz by Father Cristóbal de Morales.

What We Did • Several of my choir members helped me record it—so you can get a rough idea how the “choral extension” sounds:

Free rehearsal videos for each individual voice await you at #34648.

Jeff’s Sadness:

Free rehearsal tracks for each individual voice are available at that link, but most readers won’t click on it—and that makes me feel depressed. They take forever to create, but the choirmasters who utilize them testify they’re worth their weight in gold.

P.S.
Father Morales does some nifty things in that polyphonic “Et Incarnatus Est.” You can learn more if you watch the INTRODUCTION (51 minutes) which is available free of charge.

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

Filed Under: Articles, Featured, PDF Download Tagged With: Creating Gregorian Chant GABC, GABC Gregorian Chant, Gregorio (software), Gregorio Computer Plainsong, Gregorio Fonts Plainchant, Missa Mille Regretz, Polyphonic Credo Extensions Last Updated: January 17, 2024

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About Jeff Ostrowski

Jeff Ostrowski holds his B.M. in Music Theory from the University of Kansas (2004). He resides with his wife and children in Michigan. —(Read full biography).

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President’s Corner

    Music List • (5th Sunday of Lent)
    Readers have expressed interest in seeing the ORDER OF MUSIC I created for this coming Sunday, which is the 5th Sunday of Lent (22 March 2026). If such a thing interests you, feel free to download it as a PDF file. Traditionally, this Sunday was called ‘Passion’ Sunday. Starting in 1956, certain church leaders attempted rename both ‘Passion’ Sunday and ‘Palm’ Sunday—but it didn’t work. For example, Monsignor Frederick McManus tried to get people to call PALM SUNDAY “Second Passion Sunday”—but the faithful rejected that. I encourage all the readers to visit the feasts website, where the Propria Missae may be downloaded completely free of charge.
    —Jeff Ostrowski
    Music List • (Holy Thursday, 2026)
    Readers have expressed interest in seeing the ORDER OF MUSIC I created for Holy Thursday, which is 2 April 2026. If such a thing interests you, feel free to download it as a PDF file. I’m not sure I’ve ever heard a more piercingly beautiful INTROIT, and I have come to absolutely love the SATB version of ‘Ubi cáritas’ we are singing (joined by our burgeoning children’s choir). I encourage all the readers to visit the feasts website, where the Propria Missae may be downloaded completely free of charge.
    —Jeff Ostrowski
    “O Escam Viatorum” • (Holy Thursday)
    When I was very young, I erroneously believed the four psalms provided by the 1957 Liber Usualis—for Communion on Holy Thursday—were the “correct” music to sing on that first day of the TRIDUUM SACRUM. Those four psalms are: Psalm 22 (Dóminus regit me et nihil mihi déerit); Psalm 71 (Deus judícium tuum regi da); Psalm 103 (Bénedic ánima méa); and Psalm 150 (Laudáte Dóminum in sanctis ejus). It turns out I was way out in left field! While nothing forbids singing those psalms, many other options are equally valid. Our volunteer parish choir will sing this COMMUNION PIECE (joined by our burgeoning children’s choir) on Holy Thursday during Holy Communion. Needless to say, this will happen after the proper antiphon from the GRADUALE ROMANUM has been sung.
    —Jeff Ostrowski

Quick Thoughts

    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
    Stumped by “Episcopalian Hymnal” (1910)
    Some consider Songs of Syon (1910) the greatest Episcopalian hymnal ever printed. As a Roman Catholic, I have no right to weigh in one way or the other. However, this particular page has me stumped. I just know I’ve heard that tune somewhere! If you can help, please email me. I’m talking about the text which begins: “This is the day the Lord hath made; In unbeclouded light array’d.” The book is by George Ratcliffe Woodward, and its complete title is: Songs of Syon: A Collection of Psalms, Hymns, and Spiritual Songs. Back in 2016, Corpus Christi Watershed scanned and uploaded this insanely rare book. For years our website was the sole place one could download it as a PDF file.
    —Jeff Ostrowski
    PDF Download • “Holy, Holy, Holy”
    For vigil Masses on Saturday (a.k.a. “anticipated” Masses) we use this simpler setting of the “Holy, Holy, Holy” by Monsignor Jules Vyverman (d. 1989), a Belgian priest, organist, composer, and music educator who ultimately succeeded another ‘Jules’ (CANON JULES VAN NUFFEL) as director of the Lemmensinstituut in Belgium. Although I could be wrong, my understanding is that the LEMMENSINSTITUUT eventually merged with “Catholic University of Leuven” (originally founded in 1425). That’s the university Fulton J. Sheen attended.
    —Jeff Ostrowski

Random Quote

“The creed at baptism may be said in either Greek or Latin, at the convert’s discretion, according to the Gelasian Sacramentary.”

— Father Adrian Fortescue

Recent Posts

  • PDF Download • “Ubi Caritas” (SATB)
  • Summer 2026 • “Gregorian Chant Course” at Aquinas College (Nashville, TN)
  • Music List • (5th Sunday of Lent)
  • Music List • (Holy Thursday, 2026)
  • “O Escam Viatorum” • (Holy Thursday)

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