Obra: Sonata para piano núm. 3 en si bemol mayor, Op.106

If you’ve ever been to Wigmore Hall, you’ll know that they’re pretty hot on concert etiquette. Next to an easel sporting a canvas depicting a huge mobile phone and a giant red cross (which doesn’t exactly complement the extraordinary pre-Raphaelitesque cupola or the curves of the Steinway), before the performance an impeccably-dressed gentleman appears on stage urging the audience to check their p