Pico, as I understand your question, you want to identify the instrumental sound used by Vasco Rossi in the intoduction to the song Liberi Liberi. As I listen to the intro, the instrument sounds very much like a soprano saxaphone with alot of reverb and delay. The instrument I hear is very similar to the soprano saxaphone sound used by Kenny G in the song "Songbird". Hope this hleps. Good Luck