condition (record/cover): NM/VG+ (tiny stains on front) Gatefold sleeve with original innersleve. Walter Marchetti (1931-2015), co-founder of the legendary ZAJ collective in Madrid alongside Juan Hidalgo, presents three visionary works bridging concrete music, home-made electronics, and conceptual provocation. J'aimerais jouer avec un piano qui aurait une grosse queue (I would like to play with a piano that has a big tail, 1974-75) is a witty and subversive piano action documented at the Venice Biennale. Adversus (1966) and Osmanthus Fragrans (1973) showcase Marchetti's pioneering "home-made electric music" – lo-fi electroacoustic experimentation of raw power and poetic intensity. Self-taught and fiercely anti-establishment, Marchetti created a unique body of work embracing Cage's aesthetic while forging his own path through interactive music, concrete sound, and radical gesture.