Sofia Gubaidulina 

Vivente -Non Vivente (1970)

Sofia Gubaidulina is one of the best living composers, unlike anyone else, audacious in her intentions and reach,  seemingly entirely unselfconscious about what she does.  Those are requirements of a real genius and she's got it.   This is one of her relatively early pieces, composed for the unique ANS synthesizer constructed in the Soviet Union.