The basis of phrasing then, may be found in legato, sostenuto and contrast.
A good effect is produced in a sostenuto theme by commencing the vibrato slowly on a crescendo note.
It is fuller and rounder in quality than the soprano—less flexible, and more adapted to a sostenuto or declamatory style.
In the middle comes the second part, "Nel seno a destarmi;" then again the sostenuto.
Is not the sostenuto bellow of the arriero almost the only approach to melody that the peasant ever attempts?
"But my tremolo—my sostenuto will be ruined," said Hippolyte wildly.