The origin of a beneficial innovation was sparked off by the wish to uphold good relations with family, partners or neighbours: the quiet playing system for soundless music-making. Beginners, amateurs and pianists alike can practise at all times of the day and night without disturbing anyone thanks to the Schimmel TwinTone sound muting feature and can also profit from the double advantage of the TwinTone mode: both the classical piano sound and also the integrated digital piano for silent piano-playing. During normal acoustic piano-playing, it is possible to enjoy the full tonal qualities of the instrument with its richness of tonal colouring and dynamic range. The silent playing feature can be activated by the pianist. This mode can be activated in grand pianos with a lever on the left side of the keyboard a) and in upright pianos with the central pedal b). The hammerheads are “intercepted” during the action before they make contact with the strings