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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

PDF Download

Jeff Ostrowski · March 6, 2017

PDF Download • “Antiphonale Romanum” (1949)

Yesterday, I used the text on page 366 to create an SATB Hymn for Lent.

Jeff Ostrowski · February 21, 2017

PDF Download • “Cantus Varii” (469 Pages)

The revolution continues!

Jeff Ostrowski · January 26, 2017

PDF Download • “Sing the Angelus” (Plainchant)

Can you think of a better way to begin your choir rehearsals?

Jeff Ostrowski · January 6, 2017

PDF Download • Epiphany Booklet (FSSP.la)

To match the ancient acrostic, Erasmus changed the first line to “Herodis Hostes.”

Andrew Leung · January 5, 2017

PDF Download • “Missa de Angelis” (Fr. Castro)

Fr. Áureo Castro’s setting alternates the chant melody and the choral parts.

Jeff Ostrowski · December 10, 2016

PDF Download • “Rorate Mass” Booklet

Including a video snippet taken in Los Angeles.

Jeff Ostrowski · December 8, 2016

PDF Download • Immac. Conception Music Booklet

Make sure to read the translation of the Offertory Hymn—so gorgeous!

Andrew Leung · November 24, 2016

Free Download • Simple Choral Midnight Mass Introit

A simple setting of “Dominus Dixit ad Me” by Fr. Áureo Castro.

Jeff Ostrowski · November 23, 2016

PDF Download • “Ordo Missæ” As We Use It

Do you provide something similar for your choirs?

Guest Author · October 27, 2016

PDF Download • “Mass of the Alabaster Jar” (2016)

These settings were written to be easily played by pianists and organists of an intermediate skill level.

Jeff Ostrowski · October 24, 2016

PDF Download • Rare Hymnal by Organist at the Birmingham Oratory (1913)

Download all 572 pages—thanks to Peter Meggison!

Jeff Ostrowski · October 18, 2016

Palestrina • Jaw-Dropping “Kyrie” based on a Hymn

Two generous young ladies, currently in high school, helped me record this gorgeous Kyrie.

Jeff Ostrowski · July 20, 2016

PDF Download • St. Cecilia Hymnal (1937)

Like all the books we release, this extremely rare hymnal was previously unavailable until we scanned and uploaded it.

Andrew Leung · April 7, 2016

Free Downloads • Works by Cardinal Bartolucci (Part 2)

More choral works by Cardinal Bartolucci are available on the Domenico Bartolucci Foundation website.

Jeff Ostrowski · March 28, 2016

PDF Download • Monsignor Ronald A. Knox “The Trials Of A Translator” (1949)

Your Easter present has arrived!

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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

“A theologian who does not love art, poetry, music and nature can be dangerous since blindness and deafness toward the beautiful are not incidental: they are necessarily reflected in his theology.”

— Josef Cardinal Ratzinger (Interview, 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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