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his was ajrmndis cavus sanguineuswith a difference, though. This was a grandis cavus sanguineus ETCHRISTIANUS. Of course! AD is all the rage, now, and absolutely everybody is accessorizing with a fish. Music would prove useful in spreading what was at first no more than a sect. Statement and response psalms were a fantastic tool in the spread of Christianity, as was the soon-to-be-ubiquitous 'hymn'. Saints Augustine and Jerome were quick to see the benefit of being able to keep a message at the front of the mind with a catchy tune, although they did, at the same time, worry about the 'sensual pleasure' that the music gave and whether there was damage being done. Because of the essentially 'word of mouth' nature of the medium, too, it was frequendy the case that incorrect or even deliberately false info was getting through in these hymns. This is where the first big saviour of music stepped in. He was big, he was bold, he was brash - he was Bishop, to be fair, of Milan. And he went by the seductively sexy name of…