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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 7, 2019

Where Did “Do-Re-Mi” Come From?

A concise and clear explanation from a 1957 book…

Jeff Ostrowski · June 4, 2019

PDF Download • “Magnificat” + Rehearsal Videos!

“You think I’m kidding, but I’m not. I know of no greater piece than this.” —Jeff Ostrowski

Jeff Ostrowski · May 30, 2019

Learn To Sing SATB • “A New Approach!”

Twelve (12) hymns are already available, with tons more on the way!

Jeff Ostrowski · May 29, 2019

What Makes A “Catholic” Hymnal?

I find the following pairings reprehensible…

Jeff Ostrowski · May 23, 2019

PDF Download • Palestrina “Gloria” w/ practice videos!

Careful: the Alto line is surprisingly difficult!

Jeff Ostrowski · May 17, 2019

PDF Download • Franz Liszt and Gregorian Chant

Many would ask: “What is the purpose of posting such books? Are we supposed to sing from them?” • It turns out, these editions help us understand the journey of Franz Liszt to understand Gregorian modality.

Jeff Ostrowski · May 16, 2019

How Do You Mark Starting Pitches?

Some might ask: “Why not just write the name of the note?”

Jeff Ostrowski · May 8, 2019

1941 Mass (Chicago) mixed with 2017 Mass (FSSP)

I can’t remember if I ever released this “comparison” video…

Jeff Ostrowski · May 6, 2019

“Common” Hymn Melodies • What are they?

Choirmasters and organists understand how crucial flexibility is.

Jeff Ostrowski · May 2, 2019

PDF Download • Complete Kyriale on Modern Staves!

If you can read treble clef, you can read this edition … a brilliant idea!

Jeff Ostrowski · April 22, 2019

Josef Hofmann: “King of Pianists”

This excerpt from a 1980 radio interview with Abe Chasins proves I’m not crazy…

Jeff Ostrowski · April 20, 2019

PDF Download • “Cheat Sheet” for Easter Vigil

Releasing this is probably a bad idea…too late!

Jeff Ostrowski · April 19, 2019

PDF Download • Organ Interludes for Manuals!

I will most definitely be playing these pieces—based on hymn tunes—by Georg Philipp Telemann!

Jeff Ostrowski · April 12, 2019

Musical Program for Covid-19

Saint Vitus • MATT GONZALEZ WEDDING • Saturday, 1 August 2020…bride walks at Noon! ——Call time for singers is 10:00am ENTRANCE Organist will play INTROIT • “Deus Israël conjungat” Sung by Men from Goupil-Chant Search the René Goupil website for “pro sponsis” KYRIE #81668 — Palestrina “Fons Bonitatis” part 1 #81249 — Palestrina “Fons Bonitatis” […]

Jeff Ostrowski · April 12, 2019

The Amazing Uy Family Singers!

Not a piece you expected to hear today!

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Corpus Christi Watershed

President’s Corner

    💲 5.00 💵
    Our tiny 501(c)3 nonprofit organization exists solely by generous readers who donate $5.00 per month. We have no endowment; we have no major donors; we run no advertisements; we have no savings. A donor wrote to us: “I so appreciate all you do and have done, and your generosity is unprecedented. I am honored to be able to make a monthly contribution.” Another monthly donor says: “Thank you for everything CC Watershed does. We are able to add so much solemnity to Holy Mass due to the resources made available here.” Can you spare a few dollars each month to help us survive?
    —Corpus Christi Watershed
    Dom Pothier • Photo from 1904
    Dom Paul Cagin, in a 1904 publication (L’oeuvre de Solesmes dans la restauration du chant grégorien) made sure to include a beautiful image of Dom Pothier, the legendary abbot of St-Wandrille. Also shown is a very young Dom André Mocquereau. Auguste Pécoul—considered the spiritual “son” of Abbat Prosper Guéranger of Solesmes—wrote as follows on 24 June 1901: “To forestall any confusion, let us remember that there is just one Gregorian notation—that restored, according to the ancient manuscripts, by the eminent Abbot of Saint-Wandrille, Dom Pothier.” ✠
    —Jeff Ostrowski
    PDF • “3-Voice Motet” (Father De Laet)
    I believe 99% of our readers will recognize this hymn tune. Perhaps Father Edgard De Laet should have called it a ‘hymn’ instead of a ‘motet for three voices’—but he’s technically correct, since MOTET is defined as: “a short piece of sacred choral music, typically polyphonic and unaccompanied.” The even verses are for three voices, as you will see if you download the PDF score at #20245. The odd verses may be song a cappella SATB or unison with organ.
    —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

“After a discussion lasting several days, in which arguments for and against were discussed, the Council fathers came to the clear conclusion—wholly in agreement with the Council of Trent—that Latin must be retained as the language of cult in the Latin rite, although exceptional cases were possible and even welcome.”

— Alfons Cardinal Stickler, Vatican II ‘peritus’

Recent Posts

  • “Reminder” — Month of Febr. (2026)
  • Seminary Music Directors Gather in Houston
  • 💲 5.00 💵
  • Dom Pothier • Photo from 1904
  • PDF Chart • “Plainsong Rhythm”

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Corpus Christi Watershed is a 501(c)3 public charity dedicated to exploring and embodying as our calling the relationship of religion, culture, and the arts. This non-profit organization employs the creative media in service of theology, the Church, and Christian culture for the enrichment and enjoyment of the public.