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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 · January 1, 2016

Update • “Graduale Parvum” (English & Latin)

They have now posted Advent for double-sided printing in book form.

Jeff Ostrowski · January 1, 2016

PDF Download • New Composition By Kevin Allen

This SATB setting of “Jesu Dulcis Memoria” will help you start 2016 on the right foot!

Jeff Ostrowski · December 31, 2015

Musical Resources • Most Holy Name (Extraordinary Form)

“…mercifully grant that we may in heaven enjoy the blessed vision of him, to whose most holy name we do reverence upon earth.”

Jeff Ostrowski · December 30, 2015

Which Mass Goes With Which Season?

Unfortunately, many ignore the words of Abbot Pothier, included at the front of the Vatican Edition.

Jeff Ostrowski · December 30, 2015

Another “Oops” Moment For Liturgical Press

Msgr. Kevin Irwin says this book “reflects the best of liturgical scholarship and wisdom gleaned from the liturgy.”

Jeff Ostrowski · December 29, 2015

PDF • “The Truth Of Papal Claims” (Merry del Val)

Cardinal Raphael Merry del Val published this reply to a Protestant scholar in 1902.

Jeff Ostrowski · December 28, 2015

A Myth That Needs To Die

“I never witnessed a Mass in the so-called Extraordinary Form that was done in 15 minutes.”

Jeff Ostrowski · December 28, 2015

Hollywood: Midnight Mass By Candlelight

The FSSP had a special Christmas Mass at their new Apostolate in Los Angeles.

Jeff Ostrowski · December 24, 2015

Musical Resources • Christmas Midnight Mass (Extraordinary Form)

We won’t be singing “Frosty The Snowman” for Offertory!

Jeff Ostrowski · December 17, 2015

Sacred Vs. Secular • What Do You Think?

My performance leaves much to be desired, but you get the idea.

Jeff Ostrowski · December 16, 2015

“Veni Veni Emmanuel” • Original Setting (Two Voices)

This famous Advent hymn was not written in the 1800s—it goes back at least to the 15th century.

Jeff Ostrowski · December 14, 2015

Why Don’t Serious Catholics Address This?

If you want to test the USCCB policy, try this experiment.

Jeff Ostrowski · December 10, 2015

Rehearsal Videos • Victoria’s “Ave Maria” (SATB)

Including six reasons why Tomás Luis de Victoria may be the true composer of this piece.

Jeff Ostrowski · December 7, 2015

Rehearsal Videos • “O Magnum Mysterium” (Victoria)

With a masterpiece like this, we must be careful not to rush in where angels fear to tread.

Jeff Ostrowski · December 7, 2015

Propers for Our Lady of Guadalupe (12 December)

Providing music for the Traditional Latin Mass is not nearly as hard as some believe.

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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—1 March 2026—the 2nd Sunday of Lent (Year A). If such a thing interests you, feel free to download it as a PDF file. As always, the Responsorial Psalm, Gospel Acclamation, and Mass Propers for this Sunday are available at the flourishing feasts website alongside the official texts in Latin.
    —Jeff Ostrowski
    Particularly Beautiful
    The 2nd Sunday of Lent has magnificent propers. Its INTROIT is particularly striking—using a haunting tonality—but the COMMUNION with 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
    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

“If we continue to tolerate sad examples of liturgical abnormalities, experimentation, abuse, and simply poor-quality liturgies, why should we single out those connected to the ancient rites of the Church for special vigilance? It just doesn’t seem right.”

— An Example of a response (sent to Pope Francis) Re: the TLM

Recent Posts

  • Music List • (2nd Sunday of Lent)
  • Particularly Beautiful
  • PDF Download • “Funerals in the Ordinary Form”
  • Extreme Unction
  • Which Mass?

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