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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 · August 9, 2021

PDF Download • “A Very Sloppy Accompaniment”

What I played from yesterday…

Jeff Ostrowski · August 6, 2021

PDF Download • Alleluia (SATB) by Morales for “Ordinary Form” + “Extraordinary Form”

This piece works well in the “OF” (Ordinary Form) and also the “EF” (Extraordinary Form).

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Jeff Ostrowski · August 2, 2021

“What is Vespers?” • Live Rec. + 100% Scrolling Score

After more than a year of Vespers having been forbidden (due to Covid-19) we’re back!

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Jeff Ostrowski · July 31, 2021

(29 Pages) • Free Organ Accompaniment Book — Draft copy

The following is what I will use to accompany the congregation tomorrow.

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Jeff Ostrowski · July 31, 2021

PDF Download • Vespers Booklet for This Sunday (draft)

Starting pitches are included!

Jeff Ostrowski · July 19, 2021

PDF Download • The “1965 Missal” (1,785 pages)

“Truly Perplexing” • Pope Francis’ Motu Proprio

Jeff Ostrowski · July 3, 2021

PDF Download • “Polyphonic Creed Extension” (Perfect Canon Between Soprano & Alto)

This fabulous technique is common in Germanic countries…

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Jeff Ostrowski · June 25, 2021

PDF Download • Pentecost Sequence In English! — Gregorian Notation w/ Organ Accompaniment

Does plainsong work in English? It actually can!

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Jeff Ostrowski · June 22, 2021

PDF Download • Colossally Stupendous “Missal for the Faithful” — 1,142 pages

This is a large file (172 MB), but trust me! You will love it.

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Jeff Ostrowski · June 11, 2021

“Easy Polyphonic Agnus Dei” • Part 1 of 3

A perfect canon is the hardest thing to compose—and this is one!

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Jeff Ostrowski · June 7, 2021

“Part 2 of 3” • Guerrero Kyrie for Our Lady

This *might* be the most beautiful 45 seconds in music—Father Guerrero’s compositions are truly awe-inspiring!

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Jeff Ostrowski · June 6, 2021

PDF Drafts • Ten (10) Gregorian Chant Litanies

Here’s what I currently have…but several of these draft copies are pretty ugly!

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Andrea Leal · June 3, 2021

PDF Download • For the Sacred Heart (3 voices)

There is a great need for simple polyphonic pieces arranged for 2 voice and 3 voices.

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Jeff Ostrowski · June 2, 2021

PDF Download • Organ Accompaniments for “Lauda Sion Salvatorem” (Sequence)

“Man cannot understand this, cannot perceive it; but a lively faith affirms that the change—which is outside the natural course of things—takes place.” (Ladua Sion, v12)

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Jeff Ostrowski · May 29, 2021

PDF Download • “Credo VII Polyphonic Extension” for a Girls’ Choir

We’ve decided to try an experiment, with assistance from one of my favorite composers: Giovanni Maria Nanino (d. 1607).

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Corpus Christi Watershed

President’s Corner

    PDF • “Music List” (Sunday, 28 December)
    Readers have expressed interest in perusing the ORDER OF MUSIC I’ve prepared for Feast of the Holy Family of Jesus, Mary, & Joseph (28 Dec. 2025). If such a thing interests you, feel free to download it as a PDF file. The FAUXBOURDON verses for the Communion Antiphon are particularly gorgeous. As always, the Responsorial Psalm, Gospel Acclamation, and Mass Propers for this Sunday are available at the feasts website alongside the official texts in Latin.
    —Jeff Ostrowski
    PDF • “Music List” (Xmas Midnight Mass)
    Readers have expressed interest in perusing the ORDER OF MUSIC I’ve prepared for Christmas Midnight Mass (“Ad Missam In Nocte”). If such a thing interests you, feel free to download it as a PDF file. The ENTRANCE CHANT is simple, but quite beautiful. As always, the Responsorial Psalm, Gospel Acclamation, and Mass Propers for this Sunday are available at the feasts website alongside the official texts in Latin.
    —Jeff Ostrowski
    PDF • “Music List” (4th Sunday of Advent)
    Readers have expressed interest in perusing the ORDER OF MUSIC I’ve prepared for 21 December 2025, which is the 4th Sunday of Advent (Year A). If such a thing interests you, feel free to download it as a PDF file. The ENTRANCE CHANT is the famous “Roráte Coeli” and the fauxbourdon setting of the COMMUNION is exquisite. As always, the Responsorial Psalm, Gospel Acclamation, and Mass Propers for this Sunday are available at the feasts website alongside the official texts in Latin.
    —Jeff Ostrowski

Quick Thoughts

    What does this mean? “Pre-Urbanite”
    One of the things informed critics have frequently praised vis-à-vis the Saint Jean de Brébeuf Hymnal has to do with its careful treatment of the ancient hymns vs. the “Urbanite” hymns. This topic I had believed to be fairly well understood—but I was wrong. The reason I thought people knew about it is simple; in the EDITIO VATICANA 1908 Graduale Romanum (as well as the 1913 Liber Antiphonarius) both versions are provided, right next to each other. You can see what I mean by examining this PDF file from the Roman Gradual of 1908. Most people still don’t understand that the Urbanite versions were never adopted by any priests or monks who sang the Divine Office each day. Switching would have required a massive amount of effort and money, because all the books would need to be changed.
    —Jeff Ostrowski
    PDF Download • “Santo Santo Santo”
    Those searching for a dignified, brief, simple, bright setting of SANCTUS in Spanish (“Santo Santo Santo”) are invited to download this Setting in honor of Saint John Brébeuf (organist & vocalist). I wonder if there would be any interest in me recording a rehearsal video for this piece.
    —Jeff Ostrowski
    Pope Leo XIV on Sacred Music
    On 5 December 2025, Pope Leo XIV made this declaration with regard to liturgical music.
    —Corpus Christi Watershed

Random Quote

“One must pray to God not only with theologically precise formulas, but also in a beautiful and dignified way. The Christian community must make an examination of conscience so that the beauty of music and song will return increasingly to the liturgy.”

— Pope Saint John Paul II (26 February 2003)

Recent Posts

  • “O Antiphons” Elevated?
  • PDF • “Music List” (Sunday, 28 December)
  • Should Catholics Sing Protestant Christmas Carols?
  • PDF • “Music List” (Xmas Midnight Mass)
  • What does this mean? “Pre-Urbanite”

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