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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 · June 20, 2016

“Vidimus Stellam Ejus In Oriente”

Who could deny the text painting here?

Jeff Ostrowski · June 19, 2016

Musical Resources • 5th Sunday after Pentecost

“O God, Who hast prepared good things unseen for them that love Thee…”

Jeff Ostrowski · June 18, 2016

Does the Mass Demand a Certain Level of Dignity?

I started asking myself how anyone could argue against something like this. After all, isn’t it good to share joy?

Jeff Ostrowski · June 15, 2016

Essential Resources • Psalm Tones for Mass Propers

“The singing of the Communion Antiphon alone, which sufficed at sung Mass when Holy Communion was not given, is insufficient under the new conditions…” —Solesmes (1957)

Jeff Ostrowski · June 14, 2016

Congregational Singing in the Year 1903

“The Ordinary of the Mass and the hymn at Vespers are the parts of Divine Service in which the congregation is supposed to join.” —Solesmes (1903)

Jeff Ostrowski · June 14, 2016

New Gloria Mixing Plainsong w/ Polyphony

… composed by a Franciscan monk!

Jeff Ostrowski · June 12, 2016

Musical Resources • 4th Sunday after Pentecost

“May the mysteries we have received purify us, we beseech Thee, O Lord…”

Jeff Ostrowski · June 9, 2016

Rehearsal Videos • Masterpiece w/ Cantus Firmus

Can you tell which voice is not mine?

Jeff Ostrowski · June 8, 2016

Jeff Ostrowski’s Symposium Talk • Released!

Title: “Fifty Tips For Training Amateur Choirs”

Jeff Ostrowski · May 24, 2016

O Salutaris Hostia • Do You Like This Version?

Download this 47-page booklet … and please pardon any typos!

Jeff Ostrowski · May 18, 2016

May Crowning • The Official Antiphon

Do you agree this is a dark antiphon?

Jeff Ostrowski · May 16, 2016

The Terrifying “But” Of Vatican II

Only four (4) bishops voted against the Vatican II document on liturgy.

Jeff Ostrowski · May 15, 2016

Blast From The Past!

What did the Traditional Latin Mass look like sixteen years ago?

Jeff Ostrowski · May 13, 2016

Musical Resources • Pentecost Sunday

“O God, Who on this day didst instruct the hearts of the faithful by the light of the Holy Spirit…”

Jeff Ostrowski · May 11, 2016

Rehearsal videos • “Come, Holy Ghost” (SATB)

Pentecost is coming—are you ready?

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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
    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
    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

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

“There’s a world of difference between a thoughtful, wise Catholic and a bitter contrarian. In spite of what is claimed on certain blogs, being addicted to cable news and twitter does not make one an intellectual.”

— Jeff Ostrowski

Recent Posts

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