Оригинал: Andrew D. Gordon. Each of the 21 grooves is broken down into patterns ranging from 3 up to 16 with over 150 patterns in total. Book.
Превод: Ultimate Contemporary Ритъм Клавиатура Grooves. Книга. CD. Sheet Music, CD. Клавиатура. KBD. Поп, рок, блус, джаз, фънк, R.