"Incredibly Useful Exercises for Double Bass" is a focused cover-to-cover workout that is tailor-made to condition specific aspects of Double Bass performance. Each exercise takes about an hour, and contains a warm-up, exercise and cool-down, with detailed instructions and focus points for each exercise. Volumes 8-9, "Upper Octave Fingerboard Mastery", lead you through workouts that take place only in thumb position, ignoring the lower octave. This...