有Pavarotti的迷弟号称Pavarotti的金属的穿透力无敌，从油管搜来一些做个比较
Pavarotti, Nessun Dorma
Luciano Pavarotti and Giuseppe Di Stefano comparison. Che Gelida Mania,Puccini, La Boheme
old school tenors：1. Francesco Merli 2. giovanni Martinelli 3. Gigi 4. Mario Filippeschi 5. Giacomo Lauri-Volpi
Franco Corelli and Mario Del Monaco
“Nessun dorma” modern tenor vs Old School Tenor, Lauri-Volpi at >70 years old?
多加一个比较：Tenor comparaison Old vs New school of singing
Side by side examples Kaufman,Cura,Giacomini,Del Monaco,Caruso,Gigli
再罗列一些
Carl Hauss
Ernst Kozub
Alessandro Granda
János B. Nagy
Antonio Salvarezza
Alessandro Ziliani
Kurt Baum
Aroldo Lindi
Antonio Cortis
Carlo Bergonzi
