Hindemith's "Ludus tonalis" which is presented on this CD was composed in the American exile. It is not only the composer's last work for piano solo, but also one of the most important works of piano compositions of the 20th century. To show what music and composition are: This is what Hindmith tried to undertake in his "Ludus tonalis". The basis for harmonic practice and tonal structure presented in "The Craft of Musical Composition" finds direct application in the final concept of the "Ludus tonalis". Heinrich Strobel, musicologist and Hindemith's first biographer called "Ludus tonalis" the "Well-Tempered Piano" of the 20th century. Composer Fritz von Borries said: "What has here become music is not a mathematical problem or experiment, but a deep spiritual triumph, in which ultimate reason and ultimate being are revealed. How can the meaning of Praeludium and Postludium be more clearly represented than by letting that which began in the beginning appear in the end and run it's course in reverse direction and vertically inverted? And what wonderful music it is both times."