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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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Corpus Christi Watershed · March 14, 2024

“Lenten Polyphony for Two Voices”

On 28 February 2024, we posted this article with two women singing at Mass. Specifically, they were singing a piece for Lent called “Open, O Hard and Sinful Heart.” Since that time, the video has garnered thousands of views on YouTube and reached more than 34,000 on Facebook. If you’d like to download a special […]

Jeff Ostrowski · March 12, 2024

PDF Download • Lenten Hymn + SATB Refrain

Professor Bouyer later admitted (in his memoirs) that his team of liturgical reformers had been doomed from the start, since their goal was “recasting from top to bottom—𝘢𝘯𝘥 𝘪𝘯 𝘢 𝘧𝘦𝘸 𝘮𝘰𝘯𝘵𝘩𝘴!—an entire liturgy which had required twenty centuries to develop.”

Corpus Christi Watershed · March 4, 2024

PDF Downloads • “Contemporary Sacred Music”

Readers often send us their compositions. Today, we’d like to share some!

Jeff Ostrowski · March 2, 2024

“The Most Captivating Chorale” • (J. S. Bach)

“The mocking reed, and cruell ſpear, Their hate, his love diſplay.”

Jeff Ostrowski · March 1, 2024

“Stabat Mater” • Jeff Attempts to Sing All the Voices

A gorgeous, luscious, contemporary setting by Gustaaf Nees (d. 1965).

Jeff Ostrowski · February 28, 2024

PDF Download • “Two-Voice Polyphony For Lent”

Found in a special choral collection by Maria von Trapp.

Jeff Ostrowski · February 16, 2024

PDF Download • “For the Season of Lent” (SATB)

It even sounds great with four (4) singers: Soprano, Alto, Tenor, and Bass!

Corpus Christi Watershed · February 13, 2024

PDF Download • “Jesuit Martyrs of North America” (Stained Glass Window) — High Resolution

From “American Martyrs Catholic Church” in Manhattan Beach, California.

Jeff Ostrowski · February 13, 2024

“Ite, Missa Est” • What Does That Actually Mean?

Bishop Ambo’s assertion that Mass was attended—for centuries—by a single woman (and nobody else) is bizarre.

Jeff Ostrowski · February 10, 2024

Must We “Love” All Gregorian Chant?

Where “Parce Dómine” (the famous song for Lent) came from.

Jeff Ostrowski · January 31, 2024

PDF Download • “Pew Edition” — Monsignor Martin B. Hellriegel’s Hymnal (149 Pages)

Including never-before-released photographs of Monsignor Martin B. Hellriegel.

Jeff Ostrowski · January 30, 2024

“Polyphonic Sanctus” by J.S. Bach • Jeff Attempts All Voices (Even the Girls’ Vocals)

The occasion I speak of is when he stopped by our home to see us one final time.

Jeff Ostrowski · January 29, 2024

PDF Score • “Mass Setting I Wrote For Corrinne”

I demonstrate how the “Kyrie Eleison” can be adapted for use in the Extraordinary Form.

Jeff Ostrowski · January 23, 2024

Response to Mike’s Letter • “Six Concrete Examples”

“I would dismiss it as the second text writer being lazy and stealing someone else’s music…” —Michael H.

Follow the Discussion on Facebook

Jeff Ostrowski · January 17, 2024

PDF Download • “Credo III + Polyphonic Extension”

When I just couldn’t take it anymore, I called up a friend on the telephone and paid him $150 to teach me.

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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 Second Vatican Council has not been treated as a part of the entire living Tradition of the Church, but as an end of Tradition, a new start from zero. The truth is that this particular council defined no dogma at all, and deliberately chose to remain on a modest level, as a merely pastoral council; and yet many treat it as though it had made itself into a sort of superdogma which takes away the importance of all the rest.”

— Cardinal Ratzinger (speaking formally as head of the CDF)

Recent Posts

  • My Response Surprised A Parishioner ‘Upset’ About Latin
  • Fulton J. Sheen • “24-Hour Catechism”
  • The Weekday Communions of Lent
  • PDF Download • “Atténde Dómine”
  • “Chant Is Not a Penitential Act” • Lenten Reflection by Daniel Marshall

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