9(Keyboard Instruction). This comprehensive book will teach you the basic skills needed to play piano or keyboard in a modern worship setting. From chord inversions to color tones, from rhythmic patterns to the Nashville Numbering System, you'll learn the tools and techniques used by the pros. The online audio features over 100 demonstrations of nearly every musical example in the book, and it includes PLAYBACK+, a multi-functional audio player that allows you to slow down audio without changing pitch, set loop points, change keys, and pan left or right.