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Corpus Christi Watershed

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

Mark Haas • Article Archive

Mark Haas is a composer and speaker whose liturgical music has been sung in over 600 parishes and 10 countries. He lives in Florida with his wife and seven children.—Read full biography (with photographs).

Mark Haas · October 1, 2025

My choir is devoid of this generation (And it’s a healthy sign)

“This unique vitality is nowhere more visible than in the choir loft.”

Mark Haas · September 22, 2025

The Old Gaffer: Parish Choir Director of Middle Earth

“Tending the garden of the liturgy so that, in God’s time, fruit may grow that is destined for eternity.”

Mark Haas · September 11, 2025

Charlie Kirk’s Fascination with Traditional Catholic Liturgy

“Charlie Kirk has repeatedly spoken about the power of traditional liturgy.”

Mark Haas · September 5, 2025

Is ‘Chant’ a Generic Word for ‘Sing’ ? • No!

To call any form of liturgical singing “chant” is to obscure the meaning the Church has always attributed to Gregorian chant.

Mark Haas · August 26, 2025

“Cracker Barrel & Catholicism” • Logos and Lessons

“A restaurant’s niche—just like a Church’s patrimony—draws people in not by blending with the generic, but by standing apart.”

Mark Haas · August 19, 2025

An Arranger’s Walkthrough of “King’s Weston” (PDF & MP3 Downloads)

“There is a sacred calling for those of us who compose and arrange music for the Church.”

Mark Haas · August 7, 2025

Is this what the new “Youth Mass” looks like?

“We had 14 singers in the loft—nearly all of them teenagers.”

Mark Haas · August 1, 2025

False! • “Youthful” Music Attracts the Young

We often underestimate the spiritual hunger of our youth. But children and teenagers are drawn to beauty, truth, and transcendence.

Mark Haas · July 12, 2025

Worship the Lord in Holy Attire

“Dressing with care and reverence for Mass is a sign—not just to God, but to others—of our awareness of the sacred.”

Mark Haas · July 4, 2025

“My First Year with the Latin Mass” • A Music Director’s Perspective

“Assisting at the Traditional Latin Mass has changed me.” —Mark Haas

Mark Haas · June 4, 2025

Biography • Mark Haas

Liturgical compositions by Mark Haas have been sung in over 600 parishes.

Mark Haas · January 2, 2024

Encourage the Clergy to Sing

Those in the pews are like sheep listening for the voice of the Good Shepherd. Guest article by Mark Haas.

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Corpus Christi Watershed

President’s Corner

    PDF Download • “Sprinkling Rite”
    Liturgical reformers who gained power after Vatican II frequently caused great suffering to musicians. With the stroke of a pen, they sometimes make changes that would require thousands—or even millions—of man hours (work undertaken by composers and editors). The Sprinkling Rite during Eastertide is but one tiny example. The version given in that PDF document was the original melody for Roman Missal, Third Edition. Some still prefer that version. However, at the last moment, an “unknown hand” tinkered with a few notes in the antiphon. Those who examine the current edition can verify this with their own eyes.
    —Jeff Ostrowski
    ‘Sarum’ Good Friday?
    Plainsong of the Roman Rite has many variants—i.e. slight ‘variations’ or ‘alterations’ made to the ancient melodies. Variants often thrive in particular religious orders. Likewise, before Henry VIII broke away from the Catholic Church, Gregorian Chant variants were frequently associated with individual cathedrals in England: Hereford, Lincoln, Salisbury, and so forth. In the early 20th century, the (Anglican) organist at Westminster Abbey married “Let All Mortal Flesh Keep Silence” to this beautiful variant melody from England. Those who sing Gregorian Chant on Good Friday will recognize the melody. What do you think of this pairing?
    —Jeff Ostrowski
    PDF Download • “Eb Organ Postlude”
    Gustav Adolf Merkel (d. 1885) was a German organist, teacher, and composer. Although a Lutheran himself, he held the appointment at the (Roman Catholic) Cathedral of Dresden from 1864 until his death. You can download his Organ Postlude in E-Flat, which I like very much. He has an interesting way of marking the pedal notes. What do you think?
    —Jeff Ostrowski

Quick Thoughts

    “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
    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
    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 “Nova Organi Harmonia” demanded from each of us an unusual commitment; we have dedicated to it the best of our energies. Would it be, therefore, presumptuous on our part to be satisfied with the result and to expect its welcome reception in the musical world?

— Msgr. Jules Van Nuffel (circa 1940)

Recent Posts

  • PDF Download • “Sprinkling Rite”
  • ‘Sarum’ Good Friday?
  • Gregorian Chant • The “Correct” Way of Singing ?
  • PDF Download • “Eb Organ Postlude”
  • Fulton J. Sheen • “24-Hour Catechism”

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