BobbyZ - I don't know anything about Silvestrov's ideas on decay; can you enlighten me?
Don't want to sound as if I am more knowledgeable than I am ! But when I read the snippet on Sorensen before hearing the broadcast, I was reminded of these booklet notes from a disk I have of Metamusik and Postludium by Silvestrov.
"Both pieces begin with a sort of Big Bang, a forte explosion as jolting as a rock crashing into water and churning up the liquid element over an extensive area for a prolonged period. It is almost as if the initial shock were enough to generate energy for an entire twenty minute ( Postludium ) or even fifty minute ( Metamusik ) piece. The original event is followed by an ebbing away into eternity, a never ending reverberation. This could be read as a very precise fulfilment of the principle of the postlude as a vast echo of a single abruptly occuring sound. In the aftermath, immense potential for excitement makes itself felt and, above all in later piano phases, there are also quotation like evocations of tonal music or children's songs transformed by memory. The dynamics of subsidence common to both works leads ever further into silence - a sensitive pacification vulnerable to the merest whisper, gradually awakening the impression of emptiness submerging itself in the unconscious."
Part of notes by Hans-Klaus Jungheinrich