The vowels, pitch and intensity of the sound constitute the three elements (catalysts) of Belcanto, thanks to which the singing student, by applying them daily, soon discovers the natural colour, agility and range of his own voice , the mechanism of the “passaggio”...

The back vowel "U" is sung with the thinner vocal cords characteristic of falsetto adjustment. This makes "U " very useful in working out the man's "passaggio".CARUSO, in fact, in his vowelisation exercises always sings a "U" from f' onwards (345 Hz).In the 1931...