Rachael Kohn: What you're hearing is Gregorian Chant. But it seems Pope Gregory the 1st, known as The Great, had little if anything to do with it. Hello, this is The Ark, and I'm Rachael Kohn. The ...

Paul (left) as musical director at Loughborough University in a rehearsal for Carousel (1986) I have always been fascinated by patterns and lines in music - I studied the rise of musical notation, in ...