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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 11, 2015

Remarkable! • Amiens Cathedral During World War

There’s something scary about this image!

Jeff Ostrowski · August 10, 2015

Carlo Rossini: “Exaltate Deum Hymnal” (1941)

115 Offertories, Motets, and Hymns for SATB choirs.

Jeff Ostrowski · August 9, 2015

Do You Like This German Hymn Tune?

Hymns in 3/4 can present problems, but this one really isn’t…

Jeff Ostrowski · August 7, 2015

Propers for the Assumption (15 August)

Videos, Scores, & Mp3 Files

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

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Corpus Christi Watershed

President’s Corner

    PDF Download • “Atténde Dómine”
    Although it isn’t nearly as ancient as other hymns in the plainsong repertoire, Atténde Dómine, et miserére, quía peccávimus tíbi (“Look down, O Lord, and have mercy, for we have sinned against Thee”) has become one of the most popular hymns for LENT—perhaps because it was included in the famous Liber Usualis of Solesmes. This musical score (PDF file) has an incredibly accurate version in English, as well as a nice version in Spanish, and also the original Latin. Although I don’t claim to have a great singing voice, this morning I recorded this rehearsal video.
    —Jeff Ostrowski
    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

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

In the Orthodox Churches they have kept that pristine liturgy, so beautiful. We have lost a bit the sense of adoration. They keep, they praise God, they adore God, they sing, time doesn’t count. God is the center, and this is a richness …

— Pope Francis (8/2/2013)

Recent Posts

  • The Weekday Communions of Lent
  • PDF Download • “Atténde Dómine”
  • “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)

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