Back in Rome after the war, his wife left him (eventually inspiring "Elegia per Ty"), and he underwent a profound psychological crisis that eventually led him to the discovery of Eastern spirituality, and also to a radical transformation of his view of music. In this so-called second period, he rejected the notions of composition and authorship in favour of sheer improvisation. His improvisations were recorded on tape and later transcribed by collaborators under his guidance. They were then orchestrated and filled out by his meticulous performance instructions, or adjusted from time to time in close collaboration with the performers.