This exercise can be used to develop wrist vibrato. Easiest on the
3rd or 2nd finger, start from the note, keep the fingertip in place
and rock the wrist
and hand below and back. This exercise can also be done from the
arm. Gradually increase the number of "wobbles" per beat until full
vibrato speed is achieved. All joints in the hand must be flexible
and loose for vibrato to occur.