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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 · October 15, 2017

Video • “Subveníte Sancti Dei” (Requiem)

November 2nd will be here soon!

Jeff Ostrowski · October 14, 2017

19th Sunday after Pentecost (3rd in October)

“Let Thy healing power, O Lord, in mercy deliver us from our waywardness and cause us ever to cleave to Thy commandments…”

Jeff Ostrowski · October 6, 2017

18th Sunday after Pentecost (2nd in October)

“Let the operation of Thy mercy, we beseech Thee O Lord, direct our hearts, for without Thee we cannot please Thee.”

Jeff Ostrowski · October 6, 2017

EF Introit for this coming Sunday: “Da Pacem”

Never let anyone tell you there is no longer interest in Gregorian chant.

Jeff Ostrowski · October 4, 2017

Superlative Way To Explain Polyphony

To use melodies in this way may seem an easy task, but nothing could be further from the truth.

Jeff Ostrowski · October 3, 2017

Agnus Dei • “Missa Mille Regretz” by Fr. Cristóbal de Morales (d. 1553)

Can you hear the imaginary high note?

Jeff Ostrowski · September 29, 2017

Church Music Dubia Remain Unanswered

The time for serious discussions about church music has not yet come.

Jeff Ostrowski · September 27, 2017

Translations By Non-Catholics In A Catholic Hymnal?

The fear was that Protestant translators might distort the theology contained in the ancient Catholic hymns…

Jeff Ostrowski · September 22, 2017

Chants • Our Lady of the Holy Rosary (October 7th)

Next Sunday, some EF priests will choose an “external solemnity.”

Jeff Ostrowski · September 20, 2017

16th Sunday after Pentecost (4th in September)

“Let Thy grace, we beseech Thee, O Lord, ever go before us…”

Jeff Ostrowski · September 20, 2017

PDF Download • “Missal for the Laity” (1846)

Have you noticed liturgical progressives are never happy?

Jeff Ostrowski · September 19, 2017

PDF Download • “Lauda Sion” Hymnal (1886)

Hymns to the Blessed Virgin, Hymns for Benediction, Offertories, etc.

Jeff Ostrowski · September 15, 2017

“O Sanctissima” • SATB Contemporary Setting!

I bet you haven’t heard this arrangement!

Jeff Ostrowski · September 14, 2017

15th Sunday after Pentecost (3rd in September)

…and they glorified God, saying, “A great prophet is risen up amongst us and God hath visited His people.”

Jeff Ostrowski · September 13, 2017

Does Watershed Make A Difference?

“A huge success! My pastor was blown away at the beauty of the Mass setting by Guerrero. The people in attendance were just floored…”

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Corpus Christi Watershed

President’s Corner

    Music List • (1st Sunday of Lent)
    Readers have expressed interest in seeing the ORDER OF MUSIC I’ve prepared for this coming Sunday—22 February 2026—the 1st Sunday of Lent (Year A). If such a thing interests you, feel free to download it as a PDF file. As always, the Responsorial Psalm, Gospel Acclamation, and Mass Propers for this Sunday are available at the outstanding feasts website alongside the official texts in Latin. I spent an enormous amount of time preparing this ORDER OF MUSIC—because the children’s choir will join us—and some of its components came out great. For example, the COMMUNION ANTIPHON with Fauxbourdon is utterly resplendent, yet still ‘Lenten’.
    —Jeff Ostrowski
    2-Voice Arrangement for Lent
    Those seeking a two-voice arrangement for LENT and PASSIONTIDE should click here and scroll down. It’s based on number 775 in the Brébeuf Hymnal, with an enchanting melody written by Kevin Allen (the legendary American composer of sacred music). That text—“Pendens In Crucis Cornibus”—is often used for the Feast of our Lady of Sorrows. That link is important because, in addition to the musical score, it provides free rehearsal videos for each individual voice: something volunteer choirs appreciate!
    —Jeff Ostrowski
    “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

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

Pope Gelasius in his 9th Letter to the Bishops of Lucania condemned the evil practice which had been introduced of women serving the priest at the celebration of Mass. Since this abuse had spread to the Greeks, Innocent IV strictly forbade it in his letter to the Bishop of Tusculum: “Women should not dare to serve at the altar; they should be altogether refused this ministry.” We too have forbidden this practice in the same words in Our oft-repeated constitution “Etsi Pastoralis” (§6, #21)

— Pope Benedict XIV • Encyclical “Allatae Sunt” (26 July 1755)

Recent Posts

  • “Chant Is Not a Penitential Act” • Lenten Reflection by Daniel Marshall
  • (Ash Wednesday) • Medieval Illumination Depicting the Distribution of Ashes
  • Music List • (1st Sunday of Lent)
  • Fulton J. Sheen • “24-Hour Catechism”
  • 2-Voice Arrangement for Lent

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