The Roland drum machine rhythm dictionary by Sandy Feldstein is a specialized book that serves as a resource for those interested in drum machines and rhythmic patterns. This dictionary provides a comprehensive collection of rhythms and patterns specifically designed for use with Roland drum machines, making it a valuable tool for musicians and producers looking to create unique and intricate beats. With detailed information and creative inspiration, this book is a must-have for anyone seeking to expand their knowledge and skills in the world of drum machine programming.