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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

Biography • Matthew D. Frederes

Matthew Frederes · December 3, 2021

ATTHEW D. FREDERES learned pipe organ technique from a Franciscan sister in elementary school, and played his first Mass at the age of twelve. Since then, studying and providing music for the Sacred Liturgy has been a significant part of his life, in service to God and the Church. Mr. Frederes continued to play the organ at Mass on a weekly basis for the next thirty-one (31) years, at various parishes in the upper-Midwest, while raising a family, starting a software development firm, and working in various capacities for Catholic apostolates. Mr. Frederes directed parish choirs and Gregorian chant Schola Cantorum for the last twenty-one years (21) of his tenure in the loft. His family was a founding member of a diocesan Traditional Latin Mass community, where he enjoyed training altar servers and occasionally assisting priests learning to say the Mass, in addition to providing music for the community. Mr. Frederes is also a licensed airplane pilot.

*  Publicity Photo • MATTHEW FREDERES

Mr. Frederes and his wife have twelve children (8 boys, 4 girls), whom they homeschool. The Frederes family has recently moved to the Sierra foothills of Northern California. Some of his hobbies include aviation, woodworking, photography, amateur radio, reproducing famous recipes in the kitchen, and hiking with the family among the amazing redwoods in the area. Mr. Frederes has had the privilege of long discussions with Monsignor Richard J. Schuler, and treasures the various emails he received from this famous church musician. He looks forward to writing and contributing research to the cause of restoring tradition, especially sacred music.

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

Filed Under: Biographies Last Updated: December 3, 2022

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About Matthew Frederes

Mr. Frederes is a software engineer, pilot, served as an organist for 31 years, and directed small parish choirs/scholas for 22 years. He and his wife have 12 children. —(Read full biography).

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Corpus Christi Watershed

President’s Corner

    “Reminder” — Month of April (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
    Simplified Accompaniment (Easter Hymn)
    Number 36 in the Brébeuf Hymnal is “At the Lamb’s high feast we sing,” an English translation for Ad Cenam Agni Próvidi (which was called “Ad Régias Agni Dapes” starting 1631). As of this morning, you can download a simplified keyboard accompaniment for it. Simply click here and scroll to the bottom. Many organists are forced to serve simultaneously as both CANTOR and ACCOMPANIST. In spite of what some claim, this can be difficult—which explains why choirmasters appreciate these simplified keyboard accompaniments. Sadly, many readers will click that link but forget to scroll to the bottom where the simplified PDF file is located.
    —Jeff Ostrowski
    PDF Download • “Quasi Modo Sunday”
    The Introit for “Quasi Modo Sunday” (12 April 2026) is particularly beautiful. The musical score can be downloaded as a PDF file, and so can the organ accompaniment. The official language of the Catholic Church is Latin (whereas Greek is our mother tongue). Vatican II said Gregorian Chant must be given “first place” under normal circumstances. As a result, some parishes will rightly sing the authentic version. On the other hand, because so many USA dioceses disobey the mandate of Vatican II, some musicians sing plainsong in the vernacular. I have attempted to simultaneously accompany myself on the pipe organ while singing the English version. Although very few take advantage of it, the complete Proprium Missae is posted at the flourishing feasts website.
    —Jeff Ostrowski

Quick Thoughts

    PDF Download • “Anima Christi”
    I received a request for an organ accompaniment I created way back in 2007 for the “Anima Christi” Gregorian Chant. You can download this PDF file which has the score in plainsong followed by a keyboard accompaniment. Many melodies have been paired with “Anima Christi” over the centuries, but this is—perhaps—the most common one.
    —Jeff Ostrowski
    PDF • “Liturgical Law” (467 Pages)
    On Good Friday during the middle ages, the pope privately recited THE ENTIRE PSALTER. If you don’t believe me, see for yourself by reading this passage by Dom Charles Augustine Bachofen (d. 1943). His famous book—called “Liturgical Law: A Handbook Of The Roman Liturgy”—was published by the Benjamin Herder Book Company, which was the American arm (operating out of St. Louis, Missouri) of one of the world’s most significant Catholic publishers. Dom Charles Augustine Bachofen was born in Switzerland but spent his career between the Benedictine monasteries at Conception (Missouri) and Mount Angel (Oregon). His 1931 masterpiece, Liturgical Law can be downloaded as a PDF file … 467 pages!
    —Jeff Ostrowski
    “Gregorian Chant Quiz” • 24 March 2026
    How well do you know your Gregorian hymns? Do you recognize the tune inserted into the bass line on this score? For many years, we sang the entire Mass in Gregorian chant—and I mean everything. As a result, it would be difficult to find a Gregorian hymn I don’t recognize instantly. Only decades later did I realize (with sadness) that this skill cannot be ‘monetized’… This particular melody is used for a very famous Gregorian hymn, printed in the LIBER USUALIS. Do you recognize it? Send me an email with the correct words, and I promise to tell everybody I meet about your prowess!
    —Jeff Ostrowski

Random Quote

There is a lack of that kind of organization which favors mature judgment. Move on, move on, get it out. Schemata are multiplied without ever arriving at a considered form. The system of discussion is bad … Often the schemata arrive just before the discussions. Sometimes, and in important matters, such as the new anaphoras, the schema was distributed the evening before the discussion was to take place … Father Bugnini has only one interest: press ahead and finish.

— Cardinal Antonelli (Peritus during the Second Vatican Council)

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  • PDF Download • “Anima Christi”
  • PDF Download • “Rarer Than a Blue Moon” — Side-by-Side English Translation (Pius XII Psalter)

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