A programme in which different interpretations on gramophone records are compared. JAMES GIBB and PAUL HAMBURGER discuss the first movement of Mozart's Piano Concerto in B flat (K 595), as recorded by Backhaus, Badura-Skoda, Barenboim, Brendel, Casadesus, Fischer, Haebler, Haskil, Kempff, Matthews, Schnabel, Serkin, and others,