Any tips for loosening your 4th finger vibrato? : r violinist 4th Finger Vibrato, Is something many people struggle with. Make sure that your hand is relaxed and that your pinkey is strong and independent enough (do 4th finger strengthening exercises if not). The Three types of Vibrato, Taught By tonebase Violin Vibrato on fourth finger: normal at start or weakness? Mastering Vibrato Technique for Violin Players