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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 20, 2025

A Simple Way to Sing and Notate Organum Harmony

“Organum is a humble addition to Gregorian chant, yet it opens a profound sonic world.”

Mark Haas · October 10, 2025

Every Diocesan Music Commission Should Do This

“To assist this process, I have compiled links to the documents…” —Mark Haas

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 • “For Pentecost Sunday”
    Yesterday morning, I recorded myself singing the ENTRANCE CHANT for Pentecost Sunday while simultaneously accompanying myself on the pipe organ. Click here to see how that came out. At the end of the antiphon, there’s a triple Allelúja and I just love the chord at the end of the 2nd iteration. The organ accompaniment—along with the musical score for singers—can be downloaded free of charge at the flourishing feasts website. For the record, the antiphon on Pentecost Sunday doesn’t come from a psalm; it comes from the book of Wisdom.
    —Jeff Ostrowski
    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

Quick Thoughts

    “Thee” + “Thou” + “Thine”
    Few musicians realize that various English translations of Sacred Scripture were granted formal approval by the USCCB and the Vatican for liturgical use in the United States of America. But don’t take my word for it! Here are four documents proving this, which you can examine with your own eyes. Some believe the words “Thine” and “Thou” and “Thee” were forbidden after Vatican II—but that’s incorrect. For example, they’re found in the English translation of the ‘Our Father’ at Mass. Moreover, the Revised Standard Version (Catholic Edition) mentioned in those four documents employs “Thine” and “Thou” and “Thee.” It was published with a FOREWORD by Westminster’s Roman Catholic Archbishop (John Cardinal Heenan).
    —Jeff Ostrowski
    “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

Random Quote

“Latin has been the language of the Latin liturgy for 1,600 years. It is a sign and source of unity as well as a defense of doctrine, not because of the language so much, but because it is a language no longer subject to changes. There are so many beautiful texts which can never have the same effectiveness in translation. Lastly, Latin is bound to an extremely precious heritage of melody, Gregorian chant and polyphony.”

— Cardinal Antonelli (Secretary of the Conciliar Commission on the Liturgy)

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