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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 · August 15, 2018

13th Sunday after Pentecost (Extraordinary Form)

“Have regard, O Lord, to Thy covenant, and forsake not to the end the souls of Thy poor.”

Jeff Ostrowski · August 13, 2018

PDF Download • “Leeds Catholic Hymnal” (232 pages)

A hymnal out of print for fifty years has been scanned by Mr. Colin E. Jackson!

Jeff Ostrowski · August 7, 2018

PDF Download • “Sunday Vespers”

…including a failed descant from 1983.

Jeff Ostrowski · July 27, 2018

Remarkable Quote About Low Mass

It’s disturbing to realize that Mass was offered like this in some places.

Jeff Ostrowski · July 26, 2018

Puzzle • “Now Thank We All Our God”

Singular or Plural?

Jeff Ostrowski · July 25, 2018

1934 Footage • Gregorian Chant in Chicago

They sure did sing with gusto in those days!

Jeff Ostrowski · July 23, 2018

“Arundel Catholic Hymns” • Hymns Chosen and Edited by the Duke of Norfolk

“To the man of cultivated taste, they are displeasing—and in some cases even offensive…”

Jeff Ostrowski · July 22, 2018

Brébeuf Hymnal • “Behind the Scenes”

Creating a metrical translation like that, so very literal, is stupefyingly difficult.

Jeff Ostrowski · July 16, 2018

PDF Canon • “Non Nobis Domine” (William Byrd)

This Canon, attributed to William Byrd, was greatly admired by Beethoven and Mozart.

Jeff Ostrowski · July 11, 2018

Rehearsal videos • “Kyrie” by Josquin des Prez (d. 1521)

Recorded by participants at the 2018 Symposium!

Jeff Ostrowski · July 10, 2018

What Happens When A Choirmaster Gets Sad?

Our profession is not an easy one.

Jeff Ostrowski · July 9, 2018

(Video) • Closing Mass of Symposium 2018

…recorded on a device located at the very back of Church.

Jeff Ostrowski · July 5, 2018

iPhone Clip • “Sight-Reading Hymns”

Can you name this hymn melody?

Jeff Ostrowski · June 24, 2018

(Recorded Live) • “Agnus Dei” at the Symposium

About 450 people attended the Mass on Friday night

Jeff Ostrowski · June 19, 2018

iPhone Clip • From Sacred Music Symposium 2018

This year’s Symposium has begun…with a bang!

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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

“The sun, at one moment surrounded with scarlet flame, at another aureoled in yellow and deep purple, seemed to be in an exceedingly swift and whirling movement, at times appearing to be loosened from the sky and to be approaching the earth, strongly radiating heat.”

— ‘Dr. Domingos Pinto Coelho, noted lawyer from Lisbon and chairman of the Bar Association (1917)’

Recent Posts

  • Pope Paul VI • “Sacrificium Laudis” (15 Aug 1966)
  • “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

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