They must decide when to use vibrato and how much.

Buchanan was said to slap Davis's knuckles every time he started using heavy vibrato.

One point I am sure of: if my father had played the violin, he would not have used vibrato.

Folk music singers and instrumentalists up to the present day rarely or never use vibrato.

His tone is somewhat thin, and he uses vibrato sparingly.

Singers use vibrato, especially when singing dramatic solo music such as opera.

Many beginners who start to use vibrato will try to vibrate too fast and this makes an unpleasant sound.

Some singers use vibrato as a means of expression.

In any case, the choice of whether to use vibrato, and how much, is normally a stylistic decision on the part of the player.

It was like a bad singer who used vibrato to make sure she hit the right note at least some of the time.