Here are a few things to know and work on if pinky vibrato is hard for you: , 1The pinky structurally is like a counterbalance to the thumb. They are connected at the base of the hand through Wrist Vibrato : Lesson 5. Once you feel semi comfortable with your 2nd finger rhythms on A string, you get to try out the rhythms on your 1st, 3rd, and 4th fingers! I like to stay on the A string for Do you feel like you are working very hard for your vibrato without results? Locking the first joint of the finger (the one closest to your nail) is one of the leading causes of limited amplitude of Computerised analysis of Vengerov 's vibrato