Roberto Cacciapaglia had already gathered attention for his excellent work at the keyboards on Franco Battiato's legendary second LP Pollution before joining forces with krautrock mastermind Rolf Ulrich Kaiser for the release of his 1975 masterpiece Sonanze. Cacciapaglia self-produced the album in Milan for the Cosmic Couriers label, and it certainly brings echoes of some cosmiche kraut experiments like those of Popol Vuh, Klaus Schulze or Tangerine Dream, yet retaining a unique personality of its own. Actually it's the feel given by Cacciapaglia's mixture of classical sense compositions (he was trained in Milan's Giuseppe Verdi conservatory) with adventurous experimentalism (he worked for the RAI's phonology research team and also at the CNR in Pisa) what makes the sound of Sonanze so unique. According to the Scented Gardens Of The Mind book, "good musical references might be Terry Riley, Franco Battiato (Sulle corde di Aries), Klaus Schulze (Cyborg) and William Scheller (Lux Aeterna)."