Ernst von Dohnányi was interested in various inventions throughout his life, so it is not surprising that around 1909–1910 he became one of the main promoters of pianos with a semi-circular keyboard. At that time, they had long been experimenting with creating the most comfortable keyboard possible, with all its parts being at the same distance from the pianist, and being able to play it with the same body and hand position at the bottom, middle or top of the keyboard range. It seems that the Viennese Ludwig Bösendorfer started making pianos with a concave keyboard (Bogenklaviatur) only in 1910, and Dohnányi used them exclusively in the territory of the Austro-Hungarian Monarchy. After Dohnányi moved home to Budapest at the end of 1915, one of his own pianos was the short Clutsam-Bösendorfer, which is currently owned by the Budapest Museum of Music History. This CD offers the first recording of this special instrument after a long time restoration.