The ROCKMASTER System is for people with music in them who don't read music, but want to play keyboard accompaniment. ROCK quickly teaches you how to play along with any song whose chords are known. You can use the sheet music guitar players use, but don't have to learn the fingering for every chord, just the first one. After that the Rockmaster formula takes over, relating each ongoing chord to the chord that precedes it in the easiest way possible. Each finger stays where it is or moves to an adjacent note. The simple beauty of this formula is made even easier by ROCK's unique visual...