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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

Jeff Ostrowski • Article Archive

A theorist, organist, and conductor, Jeff Ostrowski holds his B.M. in Music Theory from the University of Kansas (2004). He completed studies in Education and Musicology at the graduate level. Having worked as a church musician in Los Angeles for ten years, in 2024 he accepted a position as choirmaster for Saint Mary of the Immaculate Conception in Michigan, where he resides with his wife and children. —Read full biography (with photographs).

Jeff Ostrowski · November 10, 2016

Musical Resources • 13 November (1962 Missal)

He said, “Make room there; for the girl is not dead, but sleepeth.” And they laughed Him to scorn.

Jeff Ostrowski · November 9, 2016

Complete “Ite Missa Est” for Parish Organist

Accompaniments by Achille P. Bragers (1887-1955).

Jeff Ostrowski · November 8, 2016

Do You Recognize This Hymn Tune?

The Brébeuf hymnal will include texts by contemporary Roman Catholic poets.

Jeff Ostrowski · November 8, 2016

Hysteria Over CDW Appointments?

Including two myths: one about the EF, and one about the OF.

Jeff Ostrowski · November 8, 2016

Do You Recognize This Hymn Tune? 1

The Brébeuf hymnal will include texts by contemporary Roman Catholic poets.

Jeff Ostrowski · November 4, 2016

Musical Resources • 6 November (Extraordinary Form)

“Grant that…through this sacrament which we have received, whatever is evil in our hearts may be restored by its gift of healing.”

Jeff Ostrowski · November 3, 2016

New Release! • “Dies Irae” Rehearsal Video

Also includes a printable score with literal English translation!

Jeff Ostrowski · November 1, 2016

“Sanctus” Recorded By Young Ladies From Las Vegas • Fabulous!

Palestrina cleverly interweaves an ancient hymn.

Jeff Ostrowski · October 30, 2016

“Kyrie VIII” Organ Accompaniment by Flor Peeters

…with the Solesmes markings.

Jeff Ostrowski · October 30, 2016

Musical Resources • Feast of Christ the King

“Ask of Me, and I will give thee the nations for thine inheritance…”

Jeff Ostrowski · October 24, 2016

“Pleni sunt coeli et terra gloria tua.”

Living in Los Angeles—what I miss most.

Jeff Ostrowski · October 24, 2016

PDF Download • Rare Hymnal by Organist at the Birmingham Oratory (1913)

Download all 572 pages—thanks to Peter Meggison!

Jeff Ostrowski · October 23, 2016

Musical Resources • 23rd Sunday after Pentecost

“Remit, we beseech Thee, O Lord, the sins of Thy people…”

Jeff Ostrowski · October 19, 2016

Watershed: Established Ten Years Ago Today!

What keeps us going is our wonderful readers, whose kindness and witness inspire us.

Jeff Ostrowski · October 18, 2016

Palestrina • Jaw-Dropping “Kyrie” based on a Hymn

Two generous young ladies, currently in high school, helped me record this gorgeous Kyrie.

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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

Far from dreading an encounter with the Iroquois, Fr. Garnier often told us he would be quite content to fall into their hands and remain their prisoner if—while they were torturing him—he at least had a chance of instructing them as long as his torments lasted. If they allowed him to live, it would afford him a golden opportunity to work for their conversion, which was now impossible, since the gateway to their country was closed as long as they were our enemies.

— Father Ragueneau (Jesuit Relations)

Recent Posts

  • “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
  • Solfege Volleyball: A Children’s Choir Game

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