Book excerpt: The present new Urtext edition of Sor's didactic pieces takes a different approach to that taken by other editions even recent ones. In preparing the material for publication, Chanterelle strove to maintain a close adherence to the composer's own statements regarding the pieces as they appear in his various writings. At the same time, each individual reference was evaluated against other available historical evidence to determine the extent to which it truly repesents Sor's applied technique, the way he actually performed these pieces himself. Opp.6, 12, 29, 31, 35, 44 & 60, with Historical Notes, Full Commentary, Thematic Index, and Playing Suggestions.