The Monophonic Heresy was, according to A Short Guide to Catholic Church History, a heretical belief that the Heavenly Host sings with one voice and not with many hierarchically arranged voices. Sector of Rheims, known as "the Flawless Thinker," was a skeptic of this heresy (Saint Fidgeta and Other Parodies, 60).


The name stems from monophonic: having a single channel or monaural[1].


  1. Wiktionary: monophonic
5. A Short Guide to Catholic Church History

Popes: Spatulus IIISporus VI
Schisms: Grand Central Schism
Heresies: Econophanic HeresyMonophonic HeresyScrupularian Heresy
Old Canards: Pope JoanGalileoAlfred Smith