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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

Catholic Composer Cristobal de Morales

Jeff Ostrowski · June 30, 2025

(Rehearsal Clips) • Sacred Music Symposium 2025

Even if I live a hundred years, I’ll never forget last week’s conference!

Jeff Ostrowski · February 15, 2024

Josquin Des Prez Was A Vandal • (Not Kidding)

Also included: the day my life changed forever.

Jeff Ostrowski · May 6, 2023

PDF Download • “Brief Choral Alleluia” (Suitable for the Ordinary and Extraordinary Form)

Too many priests are ignorant of the glories of authentic sacred music.

Jeff Ostrowski · February 4, 2023

Church Music Shouldn’t Be “Headache-Inducing”

Authentic sacred music should attract people. It should not drive them away.

Jeff Ostrowski · November 8, 2022

“Whoever controls the language controls the Masses.”

“Missa Back-To-The-Future” (a recent OCP offering) isn’t part of the treasury mandated by Vatican II; nor do I belong on the basketball court with Michael Jordan.

Jeff Ostrowski · September 9, 2022

“Defending the English” • Brief Riposte from Uganda

“As for the subject of whether the music of Tallis, Taverner, and Tye was tainted by the reformation, I would agree with Mr. Ostrowski.” —Reader from Uganda

Corpus Christi Watershed · May 3, 2022

“Repertoire Page” • Sacred Music Symposium 2022

Sign up today! A few voice parts still have openings.

Jeff Ostrowski · January 12, 2022

PDF Download • “Glory To God” (Three Voices)

Those who direct small choirs are always looking for great repertoire.

Jeff Ostrowski · September 14, 2021

PDF Download • Three Myths About Hymns

Did you know Catholics began translating hymns from Latin into the vernacular about 400 years before the Protestant Revolution?

Follow the Discussion on Facebook

Jeff Ostrowski · August 6, 2021

PDF Download • Alleluia (SATB) by Morales for “Ordinary Form” + “Extraordinary Form”

This piece works well in the “OF” (Ordinary Form) and also the “EF” (Extraordinary Form).

Follow the Discussion on Facebook

Jeff Ostrowski · August 6, 2020

Allowed or Forbidden? • Parallel Fourths in Renaissance Polyphony

Article Subtitle: “Brave schola director posts live recording from rehearsal.”

Follow the Discussion on Facebook

Jeff Ostrowski · March 7, 2020

Father Cristóbal de Morales • “Missa Mille Regretz”

Some believe Stevenson was the greatest musicologist of all time, but I believe he made an error here.

Jeff Ostrowski · March 12, 2016

PDF Download • Spanish Cathedral Music (1961)

“On Holy Saturday in 1545, while the pope and several cardinals were present, two of the oldest choir members flew at each other during the blessing of the new oils…”

Jeff Ostrowski · January 12, 2015

Cristóbal de Morales Missa “Ut Re Mi Fa Sol La.”

You’ll want to immediately download these scores, videos, and Mp3 files!

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Corpus Christi Watershed

President’s Corner

    “Sanctus VIII” • Organ Accompaniment
    A few days ago, I composed this organ harmonization for SANCTUS VIII. This Mass is traditionally called Missa de ángelis or “Mass of the angels.” In French, it is Messe de Anges. You can evaluate my attempt to simultaneously accompany myself on the pipe organ (click here) while singing the melody. My parish is currently singing this setting.
    —Jeff Ostrowski
    Music List • (5th Sund. Ordinary Time)
    Readers have expressed interest in perusing the ORDER OF MUSIC I’ve prepared for this coming Sunday, 8 February 2026, which is the 5th Sunday in Ordinary Time (Year A). If such a thing interests you, feel free to download it as a PDF file. You will probably notice it isn’t as ‘complete’ or ‘spiffy’ as usual, owing to some difficulties which took place this week.
    —Jeff Ostrowski
    PDF • “Communion” (5th Sunday in Ordin.)
    The COMMUNION ANTIPHON for this coming Sunday, 8 February 2026—which is the 5th Sunday in Ordinary Time (Year A)—is truly delightful. You can download the musical score completely free of charge. This text will be familiar to altar boys, because it’s PSALM 42. The Feder Missal makes the following claim about that psalm: “A hymn of a temple musician from Jerusalem: he is an exile in a heathen land, and he longs for the holy city and his ministry in the Temple there. The Church makes his words her own.”
    —Jeff Ostrowski

Quick Thoughts

    “Reminder” — Month of Febr. (2026)
    On a daily basis, I speak to people who don’t realize we publish a free newsletter (although they’ve followed our blog for years). We have no endowment, no major donors, no savings, and refuse to run annoying ads. As a result, our mailing list is crucial to our survival. It couldn’t be easier to subscribe! Just scroll to the bottom of any blog article and enter your email address.
    —Jeff Ostrowski
    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

Agnes De Mille: “When I see my work, I take for granted what other people value in it. I see only its ineptitude, inorganic flaws, and crudities. I am not pleased or satisfied.” — Martha Graham: “No artist is pleased.” ADM: “But then there is no satisfaction?” — MG: “No satisfaction whatever at any time,” she cried out passionately. “There is only a queer divine dissatisfaction, a blessed unrest that keeps us marching and makes us more alive than the others.”

— “Martha Graham on the Life-Force of Creativity”

Recent Posts

  • “Sanctus VIII” • Organ Accompaniment
  • PDF Download • Sanctus VIII Organ Accompaniment (“Mass of the Angels”)
  • Gorgeous Image of Monks Singing!
  • “Let the Choir Have a Voice” • Jeff Ostrowski’s Essay on Choral Music in the Catholic Mass
  • Solfege Volleyball: A Children’s Choir Game

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