St Augustine wrote in his «Confessions» «I was deeply moved by
the sweet chants of your church»; they were still being sung in the churches 700 years later during the Norman invasion; they were still being sung in the priest holes of England in the seventeenth century; these same chants were sung at Masses celebrated during two world wars.
Though Westerners were first scandalized by their omnipresence in society, «their
sweet chanting,» as one Western observer put it on a visit to Constantinople in the twelfth century, «the mingling
of the voices, the heavier [male] with the light [eunuchs»], softened the hearts
of the Franks.