Music is the Language of Heart and Soul is the only available documentary about Mariss Janson's from his early days till today. Janson's is one of the leading conductors, performing with the most important orchestras in the world. This 2 DVD-set includes a performance with M. Janson's and Concertgebouw Orchestra of Mahler. "Mariss Janson's is one of the best orchestra builders around." the New York Times "No conductor has a more extraordinary story to tell than Mariss Janson's." the Independent.