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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 · August 6, 2015

Pope Paul VI Celebrates Ambrosian Rite At Vatican II

Cardinal Montini—later known as Pope Paul VI—celebrates Mass in the St. Peter’s Basilica during Vatican II.

Jeff Ostrowski · August 5, 2015

Help Needed From Organists Who Can Improvise!

Are you a composer?

Jeff Ostrowski · August 5, 2015

Musical Resources • 11th Sunday after Pentecost (Extraordinary Form)

The Verdelot “Agnus Dei” gets better and better the more we explore its treasures.

Jeff Ostrowski · August 4, 2015

My Response To “Should Church Singers Be Paid?”

“The labourer is worthy of his hire.” (I Tim 5:18)

Jeff Ostrowski · August 4, 2015

The Easiest Way To Teach Your Choir Polyphony

What could be simpler or more fun than this?

Jeff Ostrowski · August 4, 2015

Why St. Josemaría Escrivá Only Celebrated The Extraordinary Form

“Such moments had been a part of his spiritual life since boyhood and through his priesthood.”

Jeff Ostrowski · August 2, 2015

Loading Choir Binders for 2 August 2015

Once we finish revising the scores at Goupil, this will be unnecessary.

Jeff Ostrowski · July 30, 2015

Archbishop Fulton J. Sheen On Gregorian Chant

“I did my best to give utterance to all those black notes in the missal.” —Fulton J. Sheen

Jeff Ostrowski · July 29, 2015

Musical Resources • 10th Sunday after Pentecost (Extraordinary Form)

The recessional is bright, happy, and beautiful.

Jeff Ostrowski · July 28, 2015

A Most Devastating Change By Pope Paul VI

“We strongly resent the implication that we and our children are not sufficiently intelligent to understand the simple Latin of the Mass…” —Manifesto of the Catholic Laity (1943)

Jeff Ostrowski · July 27, 2015

Why It’s Pointless To Argue Over Our Roman Missal Translation

“Women forced to sell their bodies in desperation and fear” —From a 2013 GIA hymnal

Jeff Ostrowski · July 24, 2015

Pope Pius XI and “Concelebration”

Can anyone shed light on this?

Jeff Ostrowski · July 23, 2015

Polyphony (SATB) By Verdelot • With Optional Hymn “Christe Supreme”

Amazing! Verdelot’s cadence here sounds quite modern!

Jeff Ostrowski · July 22, 2015

Musical Resources • 9th Sunday after Pentecost (Extraordinary Form)

The organist will play softly at the Offertory.

Jeff Ostrowski · July 22, 2015

The “Little Rock Nine” & Sacred Music

How could closing down all the schools be a good plan?

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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

This was first breach in the walls of a fortress, centuries old, stoutly built, strong and robust, but no longer capable of responding to the spiritual needs of the age. [N.B. the “fortress” is a liturgy which nourished countless great saints.]

— Annibale Bugnini (19 March 1966)

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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