For some reason, I’d got it into my head that the main work in the Gringolts Quartet’s midday recital at the Edinburgh Festival was going to be Beethoven’s Quartet in C sharp minor, Op.131. No problem with that, of course; it’s exactly the sort of big serious work you’d expect a big serious international violin soloist like Ilya Gringolts to play when he forms a string quartet, and then to bring on tour to a big serious international festival like Edinburgh.