World-renowned soloist and Professor of Viola at University of California, Santa Barbara and The Colburn Music Academy, Helen Callus presents her comprehensive, multi-point system of creating a solid foundation for left-hand technique. One-Step Scale System for Viola contains insights that Callus has used with her students for the past twenty years. The thorough system has been refined and rewritten to create a trim but thorough program for all ages - from the early student to the advanced. Scal...