Views from the Choir Loft

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

Jeff Ostrowski · July 11, 2018

CAN YOU KEEP A SECRET ?? This secret involves singing hymns in parts: Soprano, Alto, Tenor, Bass. Very soon, the JP2 Institute will be releasing the St. Jean de Brébeuf Hymnal, and you’ll never guess what we plan to do. For the hymns in this 900-page book, we will create rehearsal videos to help volunteer choirs sing in SATB.

To understand “individual” you must click on #89415 … (see below).

We explored rehearsal videos at the 2018 Symposium. Different participants volunteered to record each line for this Josquin KYRIE based Ave Maris Stella (a famous Gregorian hymn):

REHEARSAL VIDEOS for each individual voice and PDF score await you at #89415.

Many readers won’t click on that link (#89415)—depriving themselves of the PDF score.

Neither will they experience the individual tracks.

That makes me sad.

Singers heard on this video: Phoebe Wing, Chase Fowler, and David Thielman.

I tried to do pitch correction, but these singers hardly needed it—they were spot on! My pitch is terrible compared to theirs.

Opinions by blog authors do not necessarily represent the views of Corpus Christi Watershed.

About Jeff Ostrowski

Jeff Ostrowski holds his B.M. in Music Theory from the University of Kansas (2004). He resides with his wife and children in Michigan. —(Read full biography).

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

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