Symphonie "Les Echanges" Komposition für 156 Maschinen (02:58) Rolf Liebermann composed this piece for the Swiss Expo (National exhibition) 1964. Scored for 156 machines - amongst which one can find 16 typewriters, 18 calculator machines, 8 accounting machines, 12 office perforators, 10 caisses enregistreuses, 8 humidificateurs-colleurs, 8 tele-scripteurs, 2 metronomes, 4 bells of signalisation, 2