bel canto

bel canto puhekieltä An elegant style of singing characterized by beautiful tone and an effortless technique.
2012 March 22nd, David Blockley, Engineering: w:Very Short Introductions|A Very Short Introduction (309), (w), ISBN 9780199578696, chapter 1: “From idea to reality”, page 5:

Bel canto, or the art of beautiful singing, in 17th- and 18th-century Italy cultivated embellishment through ornaments such as cadenzas, scales, and trills which declined as the size, power, and volume of the orchestra increased.