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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 10, 2022

“Chord Pausing” • Choir Warm-Ups

Download my “choir warm-up” at this link. Have your singers pause on different chords. As choirmaster, see if you can identify each seventh chord in real time (and which position it’s in). You can hear my volunteer choir attempting this. You will notice that we still have work to do, because the singers must be […]

Jeff Ostrowski · October 6, 2022

“Bravery!” • Schola Director Posts ‘Live’ Recording

“The portable organ shall be lowered into the quire to accompany the singers, who shall sing solos in their order of seniority…” —1604 document

Jeff Ostrowski · October 5, 2022

“Portable organ shall be lowered…”

Alonso Lobo (1555-1617) started out as an assistant to Father Guerrero (d. 1599). In the book by Stevenson—which I never grow tired of praising—we find this wonderful excerpt which provides fascinating details vis-à-vis musical performance circa 1600AD. I like how it says that on Easter the prosa “must be the one composed by Morales.”

Jeff Ostrowski · October 1, 2022

“Released” • A Eucharistic Hymn You’ll Love!

Installment 4 • “How Has Nobody Done This Before?” (series)

Jeff Ostrowski · September 28, 2022

PDF Download • SATB “Alleluia” by J.S. Bach

This short piece shimmers with beauty. The arrangement is by Monsignor René Moissenet.

Jeff Ostrowski · September 27, 2022

“What Is Polyphony?” • With Audio Examples

A professor at our conservatory always told us: “An example is worth 1,000 words.”

Jeff Ostrowski · September 26, 2022

Say “Hello” to the Villain Who Lied About You

Fulton J. Sheen told a story about a man who bumped into Abraham Lincoln yelling: “Get out of my way, you big ugly lummox!”

Jeff Ostrowski · September 24, 2022

“Nobody Cares About This” • (Except Me!)

I’ve attempted to create a recording for this coming Sunday according to the official rhythm…

Jeff Ostrowski · September 21, 2022

Why Text Only?

Why do hymns in the Saint Jean de Brébeuf Hymnal give so many optional “text only” versions of the hymns? It’s easier to demonstrate than explain. Consider Hymn #24, which allows the director to choose a wonderful melody and easily apply it to the text. Hymnal editors knew about the value of “text only” versions […]

Jeff Ostrowski · September 20, 2022

PDF Download • Brief Polyphonic “Asperges Me” for SATB by Father Guerrero (d. 1599)

Here’s my attempt at recording all the voices myself, to give you a rough idea how it sounds.

Jeff Ostrowski · September 20, 2022

Official USCCB Synod Document: “The Limited Access to the 1962 Missal Was Lamented…”

In this official document, we find a remarkable statement!

Jeff Ostrowski · September 20, 2022

“Choral Eavesdropping” • 15 Sept. 2022

If you enjoy eavesdropping, here’s a rehearsal excerpt (mp3) of my volunteers singing the exercise I posted last week. This is the second time we’ve used it, and I can definitely hear improvement. You can download this choral warm-up for free.

Jeff Ostrowski · September 18, 2022

“An Irish Hymnal?” • 126 Pages (English and Gaelic)

I find this hymn quite beautiful—and singers love it!

Jeff Ostrowski · September 14, 2022

“Isolation Camps” for Summórum Catholics?

Today is the 15th anniversary of “Summorum Pontificum”—and some clerics are choosing coercion where persuasion has failed.

Jeff Ostrowski · September 13, 2022

PDF Download • 2-Voice Eucharistic Hymn by Flor Peeters (45 pages) • Includes a Descant!

Lyrics in English, with an (optional) version in Latin.

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Corpus Christi Watershed

President’s Corner

    💲 5.00 💵
    Our tiny 501(c)3 nonprofit organization exists solely by generous readers who donate $5.00 per month. We have no endowment; we have no major donors; we run no advertisements; we have no savings. A donor wrote to us: “I so appreciate all you do and have done, and your generosity is unprecedented. I am honored to be able to make a monthly contribution.” Another monthly donor says: “Thank you for everything CC Watershed does. We are able to add so much solemnity to Holy Mass due to the resources made available here.” Can you spare a few dollars each month to help us survive?
    —Corpus Christi Watershed
    Dom Pothier • Photo from 1904
    Dom Paul Cagin, in a 1904 publication (L’oeuvre de Solesmes dans la restauration du chant grégorien) made sure to include a beautiful image of Dom Pothier, the legendary abbot of St-Wandrille. Also shown is a very young Dom André Mocquereau. Auguste Pécoul—considered the spiritual “son” of Abbat Prosper Guéranger of Solesmes—wrote as follows on 24 June 1901: “To forestall any confusion, let us remember that there is just one Gregorian notation—that restored, according to the ancient manuscripts, by the eminent Abbot of Saint-Wandrille, Dom Pothier.” ✠
    —Jeff Ostrowski
    PDF • “3-Voice Motet” (Father De Laet)
    I believe 99% of our readers will recognize this hymn tune. Perhaps Father Edgard De Laet should have called it a ‘hymn’ instead of a ‘motet for three voices’—but he’s technically correct, since MOTET is defined as: “a short piece of sacred choral music, typically polyphonic and unaccompanied.” The even verses are for three voices, as you will see if you download the PDF score at #20245. The odd verses may be song a cappella SATB or unison with organ.
    —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

“The replies to this committee (of which Mgr Bugnini was the secretary) reveal a desire to reform the liturgy. In what sense? Out of 2,109 responses from bishops, just three expressed the desire to restore Communion under both kinds. There was a sizable demand for limited use of the vernacular, but only one French bishop wanted the entire Mass in French.”

— Fr. Dominic Allain (2019)

Recent Posts

  • Fulton J. Sheen • “24-Hour Catechism”
  • “Reminder” — Month of Febr. (2026)
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  • Dom Pothier • Photo from 1904

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Corpus Christi Watershed is a 501(c)3 public charity dedicated to exploring and embodying as our calling the relationship of religion, culture, and the arts. This non-profit organization employs the creative media in service of theology, the Church, and Christian culture for the enrichment and enjoyment of the public.