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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

PDF Download

Jeff Ostrowski · December 10, 2025

Crucial Tips • “Teaching Children How to Sing”

When it comes to the children, I help them memorize each word…

Jeff Ostrowski · December 9, 2025

PDF • Our Lady of Guadalupe (12 Dec.)

Why should that feast overpower Our Lady of Guadalupe?

Jeff Ostrowski · December 7, 2025

“Alma Redemptóris Mater” • Everything There Is To Know About This Marian Antiphon

Including a new harmonization for the pipe organ.

Jeff Ostrowski · December 6, 2025

Simplified Accompaniment (Advent Hymn)

Simplified keyboard accompaniment for “Come, Thou Long-Expected Jesus” (Advent hymn).

Corpus Christi Watershed · December 6, 2025

Pope Leo XIV on Sacred Music

On 5 December 2025, the pope said…

Jeff Ostrowski · December 4, 2025

PDF • “Music List” (Immaculate Concep.)

Readers have expressed interest in examining the music list I prepared for 8 December (“In Conceptione Immaculata Beatae Mariae Virginis”).

Mark Haas · December 3, 2025

PDF Downloads • 5 Simple Palestrina Pieces

A collection of Palestrina works that are not only stunningly beautiful but also surprisingly accessible.

Jeff Ostrowski · December 1, 2025

PDF Download • Agnus Dei Polyphonic “Choral Extension” (Simple Round by Ravenscroft)

It’s hard to banish that round once it enters your ears!

Corpus Christi Watershed · November 27, 2025

“Translations Approved for Liturgical Use”

There are three (3) translations of the Bible which can be used in the sacred liturgy.

Jeff Ostrowski · November 27, 2025

Dr. Mahrt explains the ‘Spoken’ Propers

This image is found on the first page of a 1974 Sacramentary.

Jeff Ostrowski · November 25, 2025

PDF • “Music List” (1st Sunday of Advent)

Readers have expressed interest in examining the “music list” I prepared for this coming Sunday.

Jeff Ostrowski · November 25, 2025

Kid’s Repertoire • “Jeffrey’s 3 Recommendations”

Growing up, I remember hearing this adage…

Jeff Ostrowski · November 24, 2025

PDF Download • ‘Choral Extension’ for the Sanctus (especially useful in the Ordinary Form)

It’d be easier to accept if they admitted they were explicitly contradicting Vatican II … but instead, they lied egregiously.

Mark Haas · November 20, 2025

Kid’s Repertoire • 3 Recommendations (Mark Haas)

“My children’s choir absolutely loves this piece.”

Jeff Ostrowski · November 18, 2025

PDF Download • “Hymn for Christ the King”

“Catholic parishes are slow to change their habits. They still sing what the oldest members learned at school.” —Evelyn Waugh

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Corpus Christi Watershed

President’s Corner

    “Sanctus VIII” • Organ Accompaniment
    A few days ago, I composed this organ harmonization for SANCTUS VIII. This Mass is traditionally called Missa de ángelis or “Mass of the angels.” In French, it is Messe de Anges. You can evaluate my attempt to simultaneously accompany myself on the pipe organ (click here) while singing the melody. My parish is currently singing this setting.
    —Jeff Ostrowski
    Music List • (5th Sund. Ordinary Time)
    Readers have expressed interest in perusing the ORDER OF MUSIC I’ve prepared for this coming Sunday, 8 February 2026, which is the 5th Sunday in Ordinary Time (Year A). If such a thing interests you, feel free to download it as a PDF file. You will probably notice it isn’t as ‘complete’ or ‘spiffy’ as usual, owing to some difficulties which took place this week.
    —Jeff Ostrowski
    PDF • “Communion” (5th Sunday in Ordin.)
    The COMMUNION ANTIPHON for this coming Sunday, 8 February 2026—which is the 5th Sunday in Ordinary Time (Year A)—is truly delightful. You can download the musical score completely free of charge. This text will be familiar to altar boys, because it’s PSALM 42. The Feder Missal makes the following claim about that psalm: “A hymn of a temple musician from Jerusalem: he is an exile in a heathen land, and he longs for the holy city and his ministry in the Temple there. The Church makes his words her own.”
    —Jeff Ostrowski

Quick Thoughts

    “Reminder” — Month of Febr. (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
    PDF Chart • “Plainsong Rhythm”
    I will go to my grave without understanding the lack of curiosity so many people have about the rhythmic modifications made by Dom André Mocquereau. For example, how can someone examine this single sheet comparison chart and at a minimum not be curious about the differences? Dom Mocquereau basically creates a LONG-SHORT LONG-SHORT rhythmic pattern—in spite of enormous and overwhelming manuscript evidence to the contrary. That’s why some scholars referred to his method as “Neo-Mensuralist” or “Neo-Mensuralism.”
    —Jeff Ostrowski
    PDF • “O Come All Ye Faithful” (Simplified)
    I admire the harmonization of “Adeste Fideles” by David Willcocks (d. 2015), who served as director of the Royal College of Music (London, England). In 2025, I was challenged to create a simplified arrangement for organists incapable of playing the authentic version at tempo. The result was this simplified keyboard arrangement (PDF download) based on the David Willcocks version of “O Come All Ye Faithful.” Feel free to play through it and let me know what you think.
    —Jeff Ostrowski

Random Quote

If it is the explicit will of the Council that the faithful are to be able to sing the “Gloria” or the “Credo” together in Latin [which it is] then indirectly there is being expressed here the obligation of regularly celebrating Mass with Latin Gregorian chant. And not merely occasionally, but with such frequency and constancy as to make the singing of these Latin texts a genuine possession of the faithful.

— Heinrich Flatten, Apostolic Protonotary & Canon Law Professor (Bonn)

Recent Posts

  • Pope Paul VI • “Sacrificium Laudis” (15 Aug 1966)
  • “Sanctus VIII” • Organ Accompaniment
  • PDF Download • Sanctus VIII Organ Accompaniment (“Mass of the Angels”)
  • Gorgeous Image of Monks Singing!
  • “Let the Choir Have a Voice” • Jeff Ostrowski’s Essay on Choral Music in the Catholic Mass

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