Progressive Independence: Rock is designed to help you gain an extremely high level of coordinated independence for rock drumming performance, thereby freeing all four limbs from dependence on one another. Once the material in this book has been mastered, you'll be capable of playing almost any rhythmic figure on snare and bass drum, in combination with six varied hi-hat/cymbal patterns, while the h-hat foot plays quarter notes, 8th notes, or upbeat 8ths.