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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 · September 14, 2016

Do You Recognize This Hymn Tune?

One man’s hymn sensitivities are another man’s…

Jeff Ostrowski · September 13, 2016

A Blemish On Hymnody Printing?

The word “Thy” is used in the Lord’s Prayer at every Mass, yet nobody struggles to understand it.

Jeff Ostrowski · September 12, 2016

Greatest Church Music Book Ever Written?

This volume by Paul Hume is supremely addictive!

Jeff Ostrowski · September 10, 2016

Chief Reasons For Mass “Facing The People”

Are you being rude to people sitting in pews behind you?

Jeff Ostrowski · September 9, 2016

A Serious Question About Vatican II

Vatican II spoke of “useless repetitions” in the liturgy, and said these should be examined…

Jeff Ostrowski · September 6, 2016

Musical Resources • 17th Sunday after Pentecost

“We implore Thy majesty, O Lord, that the holy mysteries we are celebrating may free us of past sins and save us from future sins.”

Jeff Ostrowski · September 3, 2016

No Greater Advent Piece Exists

What Guerrero did with this Advent melody is mind-blowing!

Jeff Ostrowski · September 3, 2016

Musical Resources • 16th Sunday after Pentecost

“Let Thy grace, we beseech Thee, O Lord … make us to be continually zealous in doing good works.”

Jeff Ostrowski · August 30, 2016

Does Our Enlightened Age Still Need “Sacred” Music?

This short clip from “It’s a Wonderful Life” helps us understand…

Jeff Ostrowski · August 28, 2016

Beautiful Manuscript • Priest Offering Mass

I’d like to know more about this manuscript.

Jeff Ostrowski · August 27, 2016

Musical Resources • 15th Sunday after Pentecost

“Let Thy continual pity, O Lord, cleanse and fortify Thy Church…”

Jeff Ostrowski · August 25, 2016

“Simple Kyriale” for Dumb Organists Like Me!

Fr. Valentine used to say: “You can play 100 notes right, and miss just one—and people will criticize you for that wrong one!”

Jeff Ostrowski · August 25, 2016

The Eight Gregorian Psalm Tones (PDF)

I’m sick of looking for this chart online!

Jeff Ostrowski · August 24, 2016

Can You Hear The Difference?

Do you prefer polyphony recorded by just my voice, or mixed with “real” voices?

Jeff Ostrowski · August 23, 2016

“Ad Orientem” • Why I’m Rejoicing over Sloppy Errors in the Catholic Herald

His assertion that “smoking out enemies” is best done by appointing them to high positions in the Vatican is absurd.

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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

“It was amusing to read in our papers that German Catholics were now using the vernacular at High Mass. In some parts of Germany they have been doing just that for well-nigh four hundred years! The cathedral in Osnabruck has solemn High Mass every Sunday with the whole chapter present, and the introit Gloria, Credo, Sanctus and Agnus Dei are sung … in German. Imagine, for four hundred years almost!”

— Hans Ansgar Reinhold (Dec. 1944)

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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