“I went to Ballyroan Boys’ National School, in Rathfarnham,” says the composer Donnacha Dennehy by way of introduction. The same establishment as the golfer Pádraig Harrington, I point out. Dennehy chuckles. No sports star himself at school, he did excel at music. He was composing by the age of nine, organised a music marathon when he was 10, and was introduced to Stockhausen at the Royal Irish Academy of Music a year later. “I loved it,” he recalls.