When I hear the phrase 'now that's what I call music', I feel nothing less than a huge pang of envy. This has been tempered by the sloganising of this phrase, which now acts as a parody of its previous self, but even in its parodic version it reminds us of a nostalgic certainty, about what music is and where it lives, that as a composer I can never enjoy and which, for me, is in fact a total fiction. I am less and less sure what it is that I call music (although, of course, I know when I hear it).