personnel franco mussida -- vocals , electric & acoustic guitar , 12 string guitar , theorbo , mandocello flavio premoli -- spinet , keyboards , hammond organ , minimoog , mellotron , tubular bell , harpsichord , piano , vocals mauro pagani -- flute , piccolo , violin , vocals giorgio piazza -- bass , vocals franz di cioccio -- drums , percussion , vocals all-time ranking per un amico is ranked number 15 on the prog archives top studio albums of all-time .