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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 24, 2016

Los Angeles Pontifical Mass • This Coming Sunday!

We’ll be joined by Bishop Athanasius Schneider, our FSSP District Superior, and several FSSP seminarians for a Solemn Pontifical Mass in Hollywood.

Jeff Ostrowski · June 23, 2016

“I will fear no evils, for thou art with me.”

St. John Vianney was once overheard speaking directly to the Lord.

Jeff Ostrowski · June 22, 2016

Purchase Hard Copies of the Goupil Gradual

Eight reasons why every choirmaster needs this new resource.

Jeff Ostrowski · June 21, 2016

First Instance of “Alius Cantus Aptus”

“The current rubrics of the missal … specify the moments when the celebrant must turn toward the people.” —Cardinal Sarah, 23 May 2016

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?

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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

Tournemire could be charming or he could bite your head off. One day I could not replace him at St. Clotilde because I had a wedding to play at another church. Tournemire played on Sunday, period—that was all. He did not play weddings and so forth. (He put all that on my back.) So I went to Tournemire’s house to tell him, “Master, I am sorry but, for once, I cannot replace you. I have another obligation to fulfill.” He said, “Get out of here!” I left for good.

— Testimony of Maurice Duruflé

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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