Music therapy as an artistic-scientific discipline moves within a wide variety of theoretical systems. Since its beginnings, traditions have been developed over decades in the German-speaking world with today's enormous professional and empirical scientific knowledge. In many cases, the roots lie in humanistic concepts and psychotherapeutic approaches. Influences and concepts from the Anglo-American world are gaining in importance. This book summarises the contributions of the 10th Graz Music Therapy Day of the "Grazer Musiktherapie" (GRAMUTH), where the breadth of this knowledge was presented from four lines of tradition of music therapy, newer functional approaches as well as a current study and other contributions.