watch:
Cage video

listen / browse
Tchaikovsky: Valse Sentimentale, Clara Rockmore - info here
Russolo, Risveglio Di Una Citta (1913)
Cage, Imaginary Landscape No. 1 (1939) (excerpt) - info here
Cage, from Sonatas and Interludes for Prepared Piano (1940-48) - info here
Cage, Williams Mix (1952) - info and score excerpt here
Schaeffer, Etude Aux Chemins De Fer (1948) - info here
Varese, Ionization (1931) - info here
Varese, Poeme Electronique (1958) - info here