60 Studies for Violin Op. 45 (Violin) [Paperback] Wohlfahrt, Franz and Sándor FrigyesFranz Wohlfahrt's Opus 45 is a set of 60 exercises for the Violin student, available here in one complete volume. Originally composed for his own teaching purposes, Wohlfahrt's set of studies has become a standard work for beginning the Violin and are studied the world over. The set begins with simple first position techniques, including single note pedalling and double stopping, before advancing to higher positions in later exercises.