Listened again to Isabelle van Keulen playing the Elgar violin concerto (just a few days after listening to the Hilary Hahn studio recording with Colin Davis). Van Keulen is a bit rough at places in her attack, and there are several unfortunate lapses in the finale. But she plays with spirit and one hears clearly that her heart is in what she is playing. Hilary Hahn is technically more secure and immaculate; but one does not get the same impression that she is really feeling the music. Van Keulen wins on points, but it's a pity about the intonation lapses, and also a pity that the violin is balanced a little too closely to the microphone. I must re-listen to Hahn's live performance (also with Davis, but with the Bavarian Radio Orchestra).