A radical piece by the founder of Groupe de Recherches Musicales.
Created in 1975-76, with electronic sounds prepared by Bernard Dürr,
‘Le Trièdre fertile’ is important not only as Pierre Schaeffer’s
only purely electronic music piece – his work up until this point
dealt with “acousmatic” or “sound that one hears
without seeing the causes behind it” – but also as the point
where he confessed “of a late repentance” to the fertility
of the three fundamental measurements of sound: frequency, duration
and intensity (pitch, rhythm, duration).

‘It sounds incredibly alive, visceral and alien. Schaeffer conducts his
sounds as though they’re malleable forms in a vast, non-linear space;
they attack from all angles with a vivid, visual quality, occupying
and utilising the full frequency spectrum afforded to him. It
shouldn’t really need to be said, but for clarity’s sake: this is an
absolute essential for fans of pure electronic music. Certainly one
of this year’s finest.’ (label notes)