Caruso and Tetrazinni on the Art of Singing

According to Wikipedia: "Enrico Caruso (born Errico Caruso; February 25, 1873 – August 2, 1921) was an Italian tenor. Caruso was also one of the most significant and renowned singers in any genre in both the 19th and 20th Centuries, and one of the most important pioneers of recorded music. Caruso's popular recordings and his extraordinary voice, known for its youthful beauty, mature power and unequalled richness of tone, made him perhaps the best-known operatic star of his era. Such was his influence on singing style, virtually all subsequent Italian and Spanish tenors (and many non-Mediterranean tenors, too) have been his heirs to a greater or lesser extent. Caruso remains famous when few others of early opera are remembered."