Left Hand Life Hacks – Lesson 4 – The Free and Natural Thumb Taught by Dr. David Wallace January 29, 2017 Viola • Violin • All Levels You are not logged in, or do not have permission to access this lesson.Login to watch the entire lesson. Not a myTalentForge Member? Join Today! Buy This Lesson Dr. David “Doc” Wallace Dr. David Wallace is a fiercely eclectic musician, award-winning composer, and master teaching artist who currently serves as Chair of the String Department of Berklee College of Music. Read More About Dr.→ You do not have permission to view the comments. Click here to cancel reply.You must be logged in to post a comment. This site uses Akismet to reduce spam. Learn how your comment data is processed.