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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 · December 31, 2017

“Veni Creator Spiritus” • with Fortescue’s English Translation

A plenary indulgence can be gained by singing the “Veni Creator Spiritus” publicly on New Year’s Day.

Jeff Ostrowski · December 31, 2017

“Te Deum” • Printable 4-Page Sheet

…with English Translation by Rt. Rev. Msgr. Charles E. Spence.

Jeff Ostrowski · December 24, 2017

Midnight Mass (4th Sunday of December)

“O God, Who hath brightened this most holy night with the shining of the true light…”

Jeff Ostrowski · December 24, 2017

Your Christmas Present!

We met our fundraising goal, so you get these items!

Jeff Ostrowski · December 22, 2017

Cardinal Sarah to celebrate TLM on 21 May 2018

If this is accurate, it’s marvelous news.

Jeff Ostrowski · December 21, 2017

Xmas Image • Print for Children to Color

Courtesy of John Sonnen.

Jeff Ostrowski · December 20, 2017

Can You Say “Theft” ?

Unless I am mistaken, John David Chambers stole Neale’s rhymes without attribution.

Jeff Ostrowski · December 19, 2017

“Death” • By John Henry Cardinal Newman

No man can deliver his brother, no make agreement unto God for him.

Jeff Ostrowski · December 18, 2017

PDF Download • Kyrie “O Magnum Mysterium”

This morning, I recorded the voice parts—but please pardon my screechy soprano notes!

Jeff Ostrowski · December 17, 2017

How Should Renaissance Music Be Sung?

Hermann Finck (d. 1558) wrote about choral sound and performance in 1556.

Jeff Ostrowski · December 14, 2017

3rd Sunday of Advent (3rd of December)

John answered them, saying, “I baptize with water; but there hath stood one in the midst of you, Whom you know not…”

Jeff Ostrowski · December 13, 2017

PDF Download • “Rorate Mass” (13 pages) —Dec 2017

“Let us not be cast into the darkness to burn in flames, but may we share the joy of heaven, seeing the face of God.”

Jeff Ostrowski · December 11, 2017

Advent Piece for 2 Voices

Multi-Track recording created by a high school sophomore.

Jeff Ostrowski · December 8, 2017

PDF Download • Immac. Conception Booklet

“He whom the whole world cannot contain was enclosed in thy womb…”

Jeff Ostrowski · December 7, 2017

“Creator Alme Siderum” (Guerrero)

The famous plainsong tune can be played on a Woofer Guitar.

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Corpus Christi Watershed

President’s Corner

    Music List • (2nd Sunday of Lent)
    Readers have expressed interest in seeing the ORDER OF MUSIC I created for this coming Sunday, which is the 2nd Sunday of Lent (1 March 2026). If such a thing interests you, feel free to download it as a PDF file. This feast has magnificent propers. Its somber INTROIT is particularly striking—using a haunting tonality—but the COMMUNION with its fauxbourdon verses is also quite remarkable. I encourage all the readers to visit the feasts website, where the Propria Missae may be downloaded completely free of charge.
    —Jeff Ostrowski
    Like! Like! Like!
    You won’t believe who recently gave us a “like” on the Corpus Christi Watershed FACEBOOK PAGE. Click here (PDF) to see who it was. We were not only sincerely honored, we were utterly flabbergasted. This was truly a resounding endorsement and unmistakable stamp of approval.
    —Jeff Ostrowski
    Which Mass?
    In 1905, when the Vatican Commission on Gregorian Chant began publishing the EDITIO VATICANA—still the Church’s official edition— they assigned different Masses to different types of feasts. However, they were careful to add a note (which began with the words “Qualislibet cantus hujus Ordinarii…”) making clear “chants from one Mass may be used together with those from others.” Sadly, I sometimes worked for TLM priests who weren’t fluent in Latin. As a result, they stubbornly insisted Mass settings were ‘assigned’ to different feasts and seasons (which is false). To understand the great variety, one should examine the 1904 KYRIALE of Dr. Peter Wagner. One should also look through Dom Mocquereau’s Liber Usualis (1904), in which the Masses are all mixed up. For instance, Gloria II in his book ended up being moved to the ‘ad libitum’ appendix in the EDITIO VATICANA.
    —Jeff Ostrowski

Quick Thoughts

    Extreme Unction
    Those who search Google for “CCCC MS 079” will discover high resolution images of a medieval Pontificale (“Cambridge, Corpus Christi College, MS 079”). One of the pages contains this absolutely gorgeous depiction of the Sacrament of Extreme Unction.
    —Corpus Christi Watershed
    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

At High Mass the Celebrant is not allowed to proceed with the Offertory while the “Credo” is being sung. Likewise he should not proceed with the Consecration until the singing of the “Sanctus” is completed.

— Father Carlo Rossini (1939)

Recent Posts

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