To the outside world, the conductor and organist Stephen Cleobury could come across as reserved, stoic – unassuming. But his singers knew better: ‘You have to be in partnership with him to see an entirely different world of emotions revealed,’ one of his young choristers told the journalist Richard Morrison. It was through music that Cleobury best expressed himself, and if his many recordings are anything to go by, he had a lot to say.