The Church continues to define authentically Christian music and its role in the liturgical and daily lives of the faithful as instrumental music is frowned upon, but hymns against heretical theology are encouraged.

Links:

Image of Papyrus with verses in Greek from Psalm
90

Ephrem the Syrian Hymn 22, Against Heresies

Niceta of Remesiana On the Benefit of Psalmody

David VanBrugge An Analysis of the Ancient Church Fathers on Instrumental Music

Jonathan Hehn, “Congregational Song as Theological Debate in Late Antiquity: A Case Study of Arius’s Thalia and the Development of Trinitarian Orthodoxy”. In: The Hymn: A Journal of Congregational Song, Vol. 65, No. 1, 2014, pp. 13-20.

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#395 – A History of the Catholic Church – Singing with Heart and Voice