Exercise 23 involves the same 7th and 9th chord progressions as exercise 22, but it also introduces an octave up jump after playing the first series of chords (similar to a call and response technique). The exercise also retains the same bassline as exercise 18 but introduce an altered ending in measure 12. The hardest part of this exercise is mastering the octave jumps. Lots of practice should allow the building of this skill.
Exercise 23 involves the same 7th and 9th chord progressions as exercise 22, but it also introduces an octave up jump after playing the first series of chords (similar to a call and response technique). The exercise also retains the same bassline as exercise 18 but introduce an altered ending in measure 12. The hardest part of this exercise is mastering the octave jumps. Lots of practice should allow the building of this skill.