On the radio

http://www.whrb.org/
from the guide:
1:00 pm GERARD GRISEY AND TRISTAN MURAIL ORGY
Gérard Grisey (1946-1998) and Tristan Murail (b.1947) remain two of
the most influential composers of spectral music, a term devised by
composer Hughes Dufourt in the 1970s to describe a then newly emerging
music built not around traditional harmonic, melodic or rhythmic
progressions but on the development of the sound spectrum. Aided by —
though by no means dictated by — technology and computerized sound
analysis, these two composers created music that emphasizes colour and
sonority, a continuum or an evolution of sound. Here, we present a
roughly
chronological survey of some of their works, including pivotal works
of
spectral music such as Murail's Gondwana and Désintégrations as well
as
Grisey's grand cycle Les espaces acoustiques. We also explore some of
their earlier as well as more recent works to look at the continuing
development
of sound that has been, in many ways, the hallmark of their aesthetic.