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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

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Jeff Ostrowski · December 20, 2024

“Source and Summit” • What Is That?

Notice how Dom Franquesa (without explanation) stealthily annihilates sacrifice, sin, and the adoration we owe God.

Jeff Ostrowski · December 20, 2024

Rorate Caeli + ICEL + Dynamic Equivalence

There’s an old adage: “Once stung, twice shy.”

Jeff Ostrowski · December 19, 2024

“Music List” (4th Sunday of Advent, Year C)

Readers have expressed interest in perusing the “music list” I’ve prepared for this coming Sunday.

Jeff Ostrowski · December 19, 2024

“Entrance Chant” • 4th Sunday of Advent

Like so many Advent antiphons, this one is in the first mode and comes from the prophet Isaiah.

Jeff Ostrowski · December 18, 2024

Communion (4th Sunday of Advent)

It certainly seems like most of the Advent antiphons come from the book of Isaiah…

Jeff Ostrowski · December 18, 2024

PDF Download • New Version of “What Child Is This” (SATB) … as of 18 December 2024

A different version was requested. I was able to complete that task earlier today.

Jeff Ostrowski · December 17, 2024

PDF Download • “Order of Music” (Funerals)

I have made some changes to my “musical list” for funerals.

Jeff Ostrowski · December 17, 2024

PDF Download • “The First Nowell” in Latin — Simplified Version (2024) for Choir & Organ

If you have items you’d like to learn (such as how to make multi-track rehearsal videos) please email them to us.

Jeff Ostrowski · December 13, 2024

PDF Download • “What Child Is This?” (SATB arr.)

In my view, this one falls within the “Top Ten” list of Christmas carols.

Jeff Ostrowski · December 8, 2024

“Entrance Chant” • 3rd Sunday of Advent

This Introit is in the first mode.

Jeff Ostrowski · December 7, 2024

For The Record …

It strikes me as quite “Adventy”—for lack of a better term.

Jeff Ostrowski · December 7, 2024

PDF • “Advent Kyrie Accompaniment”

Kyrie XVII: “In dominicis Adventus et Quadragesimae.”

Jeff Ostrowski · December 6, 2024

Music List • (Immaculate Conception)

Readers have expressed interest in perusing the “music list” I’ve prepared for this feast.

Jeff Ostrowski · December 6, 2024

PDF Download • “Musical Outline” for the Feast of Our Lady’s Immaculate Conception

Rachmaninoff said: “Nine hours? That’s nothing. For a period of my life, I used to practice 17 hours a day.”

Jeff Ostrowski · December 3, 2024

PDF Download • Pristine Scan: Father Mathias’ 1905 Kyriale Organ Accompaniment (186 pages)

Father Mathias served as organist for Strasburg Cathedral, where he founded the “Saint Leo Institute for Church Music” in 1913.

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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

The literal translation: “Lord, have mercy—Christ, have mercy,” does not offer much material for an acceptable song text. The words, not having any feminine syllables, are abrupt; the sounds are almost all muted and colorless; the rhythmic flow is too brief. So many people may prefer responses that further extend the song of the assembly, e.g., “Have pity on us, Lord” or “Pardon us and change our hearts.

— J. Gelineau attacking the KYRIE ELEYSON (page 64 in “Learning to Celebrate,” 1985)

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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