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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 · July 15, 2015

“Asperges Me” • Gregorian Chant

In the Extraordinary Form, the “Asperges Me” is only used on Sundays.

Jeff Ostrowski · July 14, 2015

1951 Solemn Pontifical Field Mass • With 100-Voice “Palestrina Cathedral Choir”

Following the Mass, Archbishop Joseph H. Schlarman was made an honorary Indian chief.

Jeff Ostrowski · July 13, 2015

SATB “Kyrie Eleison” • Henri Durieux

It’s extremely short and not difficult—yet fresh & gorgeous.

Jeff Ostrowski · July 13, 2015

The Day Fulton J. Sheen Made A Mistake

“Sheen told a friend of mine that anything he’d ever said of significance was taken from either Knox or Chesterton.” —Fr. George Rutler

Jeff Ostrowski · July 10, 2015

“You Will Now Feel These Interior Sentiments…”

Can you imagine a liturgical commentator standing at the front of Church declaring something like that?

Jeff Ostrowski · July 9, 2015

Musical Resources • 7th Sunday after Pentecost (Extraordinary Form)

The organist will play softly at the Offertory.

Jeff Ostrowski · July 8, 2015

Beware Of Microphones!

My mother was present during that Mass and recorded some brief snippets on her iPhone.

Jeff Ostrowski · July 7, 2015

UGLY • Just Plain, Old-Fashioned Ugly

Have you noticed that contemporary music was not forced upon congregations the same way contemporary architecture was?

Jeff Ostrowski · July 7, 2015

Short, Fresh, & Beautiful • SATB “Ave Maris Stella”

This piece by Fr. Antonin Lhoumeau will knock your socks off!

Jeff Ostrowski · July 6, 2015

The Beauty Of Ancient Catholic Manuscripts

Medieval manuscripts were normally created by (at least) two monks: one drew, one wrote.

Jeff Ostrowski · July 4, 2015

Musical Resources • 6th Sunday after Pentecost (Extraordinary Form)

The organist will play softly at the Offertory.

Jeff Ostrowski · July 4, 2015

Clarence Thomas: “I waited 25 years to return to the Church”

“Older people have an obligation not to spew their cynicism on our youth.” —Justice Thomas

Jeff Ostrowski · July 2, 2015

Annibale Bugnini’s Commentary (June 1967)

“The faithful everywhere have responded generously, and have greeted the new liturgy with great joy.” —Archbishop Bugnini (1967)

Jeff Ostrowski · July 1, 2015

Only Priests Can Save Catholic Music

Including thirteen (13) complete collections of Mass Propers…with audio examples!

Jeff Ostrowski · June 28, 2015

Loading Choir Binders In Los Angeles

I average one binder per second.

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Corpus Christi Watershed

President’s Corner

    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
    PDF Download • “Funeral Procession”
    From a mediæval Book of Hours, I was sent this glorious depiction of a Roman Catholic funeral procession by Simon Bening (d. 1561). The image resolution is extremely high. I’m not sure I know of a more beautiful illustration of a mediæval church. And I love how the servers are wearing red and pink cassocks!
    —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

  • PDF Download • Communion for Sunday
  • “Translating the Bible” • Msgr. Ronald Knox (1953)
  • Season’s End Repertoire
  • PDF Download • “Funeral Procession”
  • Re: The “Correct” Way To Sing Gregorian Chant

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