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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 · August 31, 2022

“Intriguing Quote” • Msgr. Richard J. Schuler

“The new 𝑀𝑖𝑠𝑠𝑎𝑙𝑒 𝑅𝑜𝑚𝑎𝑛𝑢𝑚 of Pope Paul VI is essentially the same missal that was in use from the time of the Council of Trent…” — Msgr. Richard J. Schuler

Jeff Ostrowski · August 30, 2022

PDF Download • “Tantum Ergo” Two-Part Interlude (Manuals Only) by Flor Peeters

Including a stunningly gorgeous (and rare!) hymn by Flor Peeters.

Jeff Ostrowski · August 29, 2022

“Did The Pope Really Say That?” • Re: Solesmes Rhythm

My response to the recent article by Professor Charles Weaver.

Jeff Ostrowski · August 29, 2022

Heavy Crosses Borne by Choirmasters

In my 25 years as a choirmaster, I’ve witnessed hypocrisy and mistreatment that would make your head spin.

Jeff Ostrowski · August 25, 2022

Have You Done This?

Friends, have you done this yet? I’m talking about subscribing to our free mailing list. We beg you! Do this as soon as possible. Scroll to the bottom of any article, and you will see the place you input your email.

Jeff Ostrowski · August 25, 2022

“New Gregorian Chant Project” • Part 2

Using this coming Sunday (12th Sunday after Pentecost) as an example.

Jeff Ostrowski · August 23, 2022

PDF Download • Organ Accompaniment for Kyrie VIII (“Missa de Angelis”) by Jeff Ostrowski

I consider this my best organ accompaniment … I hope you like it!

Jeff Ostrowski · August 20, 2022

“New Section 2” • (Piecemeal Agnus Dei)

A wonderful way to get volunteers singing SATB polyphony immediately!

Jeff Ostrowski · August 17, 2022

PDF Download • Extremely Rare! — 1913 “Vesperale” by Schwann (954 pages)

Today’s release will go down in history!

Jeff Ostrowski · August 15, 2022

PDF • “Organ Interludes” (Manuals Only)

In graduate school, one is taught a valuable lesson: if you emphasize everything, nothing is emphasized. In other words, putting every other word in bold or italic (or both) wrecks your paper. I never to use the word “best”—but today I make an exception. The book of organ interludes released today by my colleague is […]

Jeff Ostrowski · August 15, 2022

“Wild Accompaniment” • Flor Peeters (Kyrie VIII)

Kyrie “Missa de Angelis”—recorded yesterday by a volunteer choir.

Jeff Ostrowski · August 9, 2022

“Could Women Sing At Mass Before Vatican II?”

Does this sound like a “hymn” to you? Or does it sound like a “chant” composition?

Jeff Ostrowski · August 8, 2022

PDF Download • “Salve Regina” (32 Versions)

In this article, I examine the elusive provenance of what some have called “the most popular piece of plainsong.”

Jeff Ostrowski · August 4, 2022

For the Upcoming Choir Season!

Last week, I posted an SATB choral setting of the SANCTUS in a ‘contemporary’ style. You might want to consider this piece for two reasons: (1) It’s extremely brief; (2) Free rehearsal videos are available for each individual part. The piece is by Father Lhoumeau.

Jeff Ostrowski · August 2, 2022

Sequence For Martin Luther? • (Sung to the melody of “Victimae Paschali Laudes”)

Dr. Luca Ricossa has made a YouTube recording of this Sequence!

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Corpus Christi Watershed

President’s Corner

    PDF Download • “Organ Accompaniment”
    Over the past few years, I’ve been harmonizing all the vernacular plainsong Introit settings by the CHAUMONOT COMPOSERS GROUP. This coming Sunday—10 May 2026—is the 6th Sunday of Easter (Year A). The following declaration will probably smack of “blowing my own horn.” However, I’d rank this accompaniment as my best yet. In this rehearsal video, I attempt to sing it while simultaneously accompanying myself on the pipe organ. The musical score [for singers] as well as my organ accompaniment can be downloaded free of charge from the flourishing feasts website.
    —Jeff Ostrowski
    “Gregorian Chant Quiz” • 4 May 2026
    A few days ago, the CORPUS CHRISTI WATERSHED Facebook page posted this Gregorian Chant quiz regarding a rubric for the SEQUENCE for the feast of Corpus Christi: “Lauda Sion Salvatórem.” There is no audience more intelligent than ours—yet surprisingly nobody has been able to guess the rubric. Drop me an email with the right answer, and I’ll affirm your brilliance to everyone I encounter!
    —Jeff Ostrowski
    “Rare Photographs” • Hannibal Bugnini
    On 2 September 2025, we included in this article extremely rare photographs of Archbishop Hannibal Bugnini taken in Iran circa 1979. Bugnini had initially been banished by the pope to Uruguay, but he refused to obey. [This is interesting, since Bugnini relied upon ‘blind obedience’ when it came to modifications of the ancient liturgy.] After he refused to obey the order from the pope, Hannibal Bugnini was banished to Iran. You can also watch a short video of Hannibal Bugnini in Iran, dated 10 November 1979. That’s about a week after the USA embassy hostage crisis began in Tehran, and Pope Saint John Paul II had sent the leader of the Iranian Revolution a special letter.
    —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

“If he converses with the learned and judicious, he delights in their talent—if with the ignorant and foolish, he enjoys their stupidity. He is not even offended by professional jesters. With a wonderful dexterity he accommodates himself to every disposition. As a rule, in talking with women (even with his own wife) he is full of jokes and banter.”

— ‘Erasmus on St. Thomas More (England’s 1st lay Chancellor)’

Recent Posts

  • PDF Download • “Organ Accompaniment”
  • “Gregorian Chant Quiz” • 4 May 2026
  • “Rare Photographs” • Hannibal Bugnini
  • “Regina Caeli” • More Than You Wanted To Know
  • Music List • “5th Sunday of Easter” (Year A)

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