Kazimierz Serocki (1922 to 1981): his final orchestral work,
Pianophonie for piano, "elektronické zvuky" and orchestra (1978)
http://www.mediafire.com/?ka3f78aaup17pziFrom a wireless broadcast. Performed by Szabolcs Esztényi and the Baden-Baden Radio Symphony Orchestra, conducted by Ernest Bour. Duration thirty-one minutes.
My Czech dictionary (Fronek) does not run to "zvuky" - the closest it comes is "zvykacka" meaning "chewing-gum." According to Grove's, "Pianophonie, with its incorporation of electronic transformation of much of the soloist's music, is a logical and memorable outcome of the composer's ceaseless and energetic application of performing techniques to expressive ends. Serocki was a musical abstractionist for whom colour was both decorative and substantive, both transitory and structural." So, this is posted in the hope that some will admire it - although I am impelled to confess that it doesn't appeal to me much . . . (I must now listen to the two early symphonies - thanks to Dundonnell - and see how they compare).
This is surprising, "zvuk" does mean "sound" in Czech and in some other Slavic languages, albeit not in Polish... :-\