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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 · May 2, 2019

PDF Download • Complete Kyriale on Modern Staves!

If you can read treble clef, you can read this edition … a brilliant idea!

Jeff Ostrowski · April 22, 2019

Josef Hofmann: “King of Pianists”

This excerpt from a 1980 radio interview with Abe Chasins proves I’m not crazy…

Jeff Ostrowski · April 20, 2019

PDF Download • “Cheat Sheet” for Easter Vigil

Releasing this is probably a bad idea…too late!

Jeff Ostrowski · April 19, 2019

PDF Download • Organ Interludes for Manuals!

I will most definitely be playing these pieces—based on hymn tunes—by Georg Philipp Telemann!

Jeff Ostrowski · April 12, 2019

Musical Program for Covid-19

Saint Vitus • MATT GONZALEZ WEDDING • Saturday, 1 August 2020…bride walks at Noon! ——Call time for singers is 10:00am ENTRANCE Organist will play INTROIT • “Deus Israël conjungat” Sung by Men from Goupil-Chant Search the René Goupil website for “pro sponsis” KYRIE #81668 — Palestrina “Fons Bonitatis” part 1 #81249 — Palestrina “Fons Bonitatis” […]

Jeff Ostrowski · April 12, 2019

The Amazing Uy Family Singers!

Not a piece you expected to hear today!

Jeff Ostrowski · April 10, 2019

(captured by iPhone) • Rehearsing for the Symposium

Do me a huge favor…

Jeff Ostrowski · April 9, 2019

Brébeuf Harmony Edition • “Splendid Beyond Words”

Folks, there’s just one word for this: WOW.

Jeff Ostrowski · April 8, 2019

PDF Download • Spectacular “Tenebrae” Booklet

Mr. Albert Bloomfield has done us a breathtaking favor.

Jeff Ostrowski · April 6, 2019

St. Michael the Archangel Prayer…in Gregorian Chant!

From a rare book of Franciscan chants (1902)

Follow the Discussion on Facebook

Jeff Ostrowski · April 4, 2019

PDF Download • Mystery Kyriale (100 Pages)

Nobody knows the author or date of publication.

Jeff Ostrowski · March 19, 2019

A Short Piece We’re Singing For Lent

A few weeks ago, I had the opportunity to sit down with one of the smartest Catholic priests alive.

Jeff Ostrowski · March 14, 2019

“Sarum Rite” • Did it exist? What is it?

“To contrast Ancient Sarum with Modern Roman is absurd.” —Fr. Adrian Fortescue (1912)

Jeff Ostrowski · March 13, 2019

Offensive Music in Germany • Ash Wednesday (2019)

Have you ever seen a liturgical “instrument” like this?

Jeff Ostrowski · March 7, 2019

“The New Mass” • Discussed by Michael Davies, Malachi Martin, Msgr. Champlin, and William F. Buckley

Fascinating debate recorded 22 April 1980.

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Corpus Christi Watershed

President’s Corner

    Music List • “5th Sunday of Easter” (Year A)
    Readers have expressed interest in seeing the ORDER OF MUSIC I created for the 5th Sunday of Easter Sunday—a.k.a. “Dominica V Paschae”—which is 3 May 2026. Please feel free to download it as a PDF file if such a thing interests you. The COMMUNION (“Tanto Témpore Vobíscum Sum”) is rather somber, with awesome fauxbourdon psalm verses. The ENTRANCE CHANT is bright and happy.
    —Jeff Ostrowski
    PDF Download • Communion for Sunday
    The COMMUNION ANTIPHON with fauxbourdon psalm verses for this coming Sunday (3 May 2026) is elegant and poignant. It’s such a shame it only comes every three years. This piece—along with all the musical scores for this coming Sunday, which is the 5th Sunday of Easter (Year A)—can be downloaded free of charge from the flourishing feasts website. By the way, how is it already 2026?
    —Jeff Ostrowski
    Season’s End Repertoire
    Looking at the REPERTOIRE SHEET until the end of the choral season, I see that I’ve fallen behind schedule. (The last three months have been extraordinarily busy.) As you know, I have been providing organ harmonies for all the ENTRANCE CHANTS—as well as rehearsal videos—and you can see I’m behind where I planned to be. Now I must make up lost ground. However, the choir picks up the ENTRANCE CHANT with ease, so I’m sure it will all work out. My ‘unofficial’ harmonizations are being posted each week at the flourishing feasts website.
    —Jeff Ostrowski

Quick Thoughts

    PDF Download • “Anima Christi”
    I received a request for an organ accompaniment I created way back in 2007 for the “Anima Christi” Gregorian Chant. You can download this PDF file which has the score in plainsong followed by a keyboard accompaniment. Many melodies have been paired with “Anima Christi” over the centuries, but this is—perhaps—the most common one.
    —Jeff Ostrowski
    PDF • “Liturgical Law” (467 Pages)
    On Good Friday during the middle ages, the pope privately recited THE ENTIRE PSALTER. If you don’t believe me, see for yourself by reading this passage by Dom Charles Augustine Bachofen (d. 1943). His famous book—called “Liturgical Law: A Handbook Of The Roman Liturgy”—was published by the Benjamin Herder Book Company, which was the American arm (operating out of St. Louis, Missouri) of one of the world’s most significant Catholic publishers. Dom Charles Augustine Bachofen was born in Switzerland but spent his career between the Benedictine monasteries at Conception (Missouri) and Mount Angel (Oregon). His 1931 masterpiece, Liturgical Law can be downloaded as a PDF file … 467 pages!
    —Jeff Ostrowski
    “Gregorian Chant Quiz” • 24 March 2026
    How well do you know your Gregorian hymns? Do you recognize the tune inserted into the bass line on this score? For many years, we sang the entire Mass in Gregorian chant—and I mean everything. As a result, it would be difficult to find a Gregorian hymn I don’t recognize instantly. Only decades later did I realize (with sadness) that this skill cannot be ‘monetized’… This particular melody is used for a very famous Gregorian hymn, printed in the LIBER USUALIS. Do you recognize it? Send me an email with the correct words, and I promise to tell everybody I meet about your prowess!
    —Jeff Ostrowski

Random Quote

“It would be a grave error to imagine that the principle orientation of the sacrificial action is towards the community. If the priest celebrates «VERSUS POPULUM», which is legitimate and often advisable, his spiritual attitude ought always to be «VERSUS DEUM PER JESUM CHRISTUM», as representative of the entire Church.”

— Official Vatican Statement (25 September 2000)

Recent Posts

  • Music List • “5th Sunday of Easter” (Year A)
  • PDF Download • Communion for Sunday
  • “Translating the Bible” • Msgr. Ronald Knox (1953)
  • Season’s End Repertoire
  • PDF Download • “Funeral Procession”

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