This week's Gramophone Podcast sees pianist Can Çakmur join Editor Martin Cullingford to talk about the latest album in his series for the BIS label in which he pairs works by Schubert with music by composers inspired by him - in this instance Ernst Krenek. As well as introducing Krenek's Second Sonata, he also talks about the composer's completion of Schubert's Piano Sonata in C Major, D 840.