Known for his scientific explorations of timbre and his innovative syntheses of acoustic and electronic techniques, Tristan Murail is regarded as a composer of the "spectral school." He accepts untempered sound as the basis for his expansive musical language, far removed from tonality, serialism, and aleatoric procedures. Gondwana was developed from electronic music concepts, and its expanding and contracting bands of complex sounds are analogous to those generated through a synthesizer. Shimmering clusters, washes of color, and massed, low sonorities evoke the slow shifting of continents. The Orchestre National de France, directed by Yves Prin, delivers this work with primordial grandeur and astonishing depth. Because of its smaller forces, Désintégrations is more focused and intense than Gondwana, though no less cosmic in its implications. The Ensemble de l'Itinéraire blends effectively with the electronic tape, so it is difficult to distinguish acoustic from synthetic sounds. Time and Again is a departure from the familiar practice of slowly unfolding processes, for its chopped-up material is jumbled, as if sequential events were reordered in a time machine.
Invisible are from Argentina and they released 3 albums in the seventies before calling it quits. Their second album named Durazno Sangrando from 1975 is to many the peak, the story is based on the book of Carl Jung and has very solid lyrics besides music made by the head of the band Luis Alberto Spinetta. It has some great instrumental sections like the opening track Encadenado al ánima who is the longest from here. Not very much to add, while is pleasent most of the time, on some particular passages is little going on even has some subltle jazz symphonic arrangements in overall sound.
Polish Radio Experimental Studio at Warszawa was founded in October 1957 by Jozef Patkowski who conducted the Studio till 1985. More then 200 autonomous compositions produced. Several hundreds titles for film, theatre, TV, radio and various exhibi¬tions came out from the Studio.