ɪn hɪz lˈeɪɾɚ kɚɹˈɪɹ hiː bɪkˌeɪm nˈoʊn fɔːɹ ɛksˈɛsɪvli lˈɔŋhˈɛld hˈaɪ nˈoʊts sˈʌtʃ ɐz ˈɪn "dˈaɪ kwˈɛlə pˈiəɹə" ænd "nˈɛsʌn dˈoːɹmə"ænd tˌɛmpɹəmˈɛntəl ɔːɹ bᵻzˈɑːɹ bᵻhˈeɪvjɚ, ˌɔn ænd ˈɔf stˈeɪdʒ.
In his later career he became known for excessively long-held high notes (such as in "Di quella pira" and "Nessun dorma") and temperamental or bizarre behaviour, on and off stage.