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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 · February 20, 2017

2-1 Suspension in Guerrero Motet

“Now this is eternal life: That they may know thee, the only true God, and Jesus Christ, whom thou hast sent.”

Jeff Ostrowski · February 18, 2017

Musical Resources • Sexagesima Sunday 1

“O God, who seest that we put no trust in ourselves…”

Jeff Ostrowski · February 13, 2017

Refutations • “Can the Latin Mass be enriched?”

The OF can enrich the EF, but not the way Fr. Stravinskas describes.

Jeff Ostrowski · February 11, 2017

Who I Am

Vladimir Horowitz was especially known for this ability.

Jeff Ostrowski · February 9, 2017

“A Trip to the Sacred Music Symposium” • (Film)

Two young ladies in high school created this video as part of a school project.

Jeff Ostrowski · February 7, 2017

Musical Resources • Septuagesima Sunday 1

“Or, is it not lawful for me to do what I will? Is thine eye evil, because I am good?”

Jeff Ostrowski · February 6, 2017

Pope Benedict XVI on this Sunday’s Introit

“The virgin mother bound his limbs in swaddling clothes; such bands held the hands and feet of God!”

Jeff Ostrowski · February 5, 2017

“The Return of the SSPX”

Reflections by a member of the Priestly Fraternity of Saint Peter.

Jeff Ostrowski · February 3, 2017

Did we meet our fundraising goal?

The answer will amaze!

Jeff Ostrowski · January 31, 2017

Photos • Society for Catholic Liturgy Conference

After Mass, a presentation was delivered by the Executive Director of the USCCB Committee on Divine Worship.

Jeff Ostrowski · January 30, 2017

Mind-Blowing SATB Canon

“Laudate Dominum” by William Croft (†1727) is a miracle.

Jeff Ostrowski · January 26, 2017

PDF Download • “Sing the Angelus” (Plainchant)

Can you think of a better way to begin your choir rehearsals?

Jeff Ostrowski · January 24, 2017

Musical Resources • 4th Sunday after Epiphany

“But the men wondered, saying, What manner of man is this, for the winds and the sea obey Him?”

Jeff Ostrowski · January 23, 2017

More From The New Microphone

This Introit is repeated many times, depending on how many Sundays occur after Epiphany.

Jeff Ostrowski · January 17, 2017

PDF • “The Book of Ceremonies” (629 pages)

By Rev. Laurence J. O’Connell, and *published in English* in 1943.

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Corpus Christi Watershed

President’s Corner

    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
    PDF Download • “Atténde Dómine”
    Although it isn’t nearly as ancient as other hymns in the plainsong repertoire, Atténde Dómine, et miserére, quía peccávimus tíbi (“Look down, O Lord, and have mercy, for we have sinned against Thee”) has become one of the most popular hymns for LENT—perhaps because it was included in the famous Liber Usualis of Solesmes. This musical score (PDF file) has an incredibly accurate version in English, as well as a nice version in Spanish, and also the original Latin. Although I don’t claim to have a great singing voice, this morning I recorded this rehearsal video.
    —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

“It is when they are practicing that large groups stop in order to sleep; they don’t give themselves a new impetus after a pause (even if it is minimal) and singers pause when they should not (quarter-bar, half-bar)—everything provides temptation to go to sleep! It is thus not a question of rhythm but of musical integrity.”

— Justine Ward (20 July 1952)

Recent Posts

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  • PDF Download • “Pange Lingua” in Simple (Contemporary) Polyphony for Three Voices
  • PDF Download • “Gregorian Chant Booklet” mailed by Pope Saint Paul VI to every bishop

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