'Take two steps forward’, he said. ‘Now, what can you see?’ I described the shape of the music on the page, the way that lines went up or down...'

Take two steps forward’, he said. ‘Now, what can you see?’ I described the shape of the music on the page, the way that lines went up or down. Another two steps forward. Then, I could discern groups of notes, the way they twisted and turned.