I Used to Play Vioilin Book and CD. first and foremost, this book is meant to get you re acquainted with your instrument by providing you with the type of music you want to play. This book contains a wide variety of songs in varying styles, giving you countless hours of enjoyment. The enclosed CD contains audio MP3 files of rhythm section, as a bonus, the CD contains complete performances of the songs to give you a goal of a performance standard.