the notice with the piano marks the way, with which a finger strikes on the piano key or is to strike, in order to obtain a certain effect over an individual clay/tone. With the notice one regulates thus everything at the clay/tone except the actual pitch.
The notice is converted by the appropriate piano hammer into an appropriate notice on the piano string.
The notice can be differentiated with respect to strength (conversion to volume), duration and above all the actual shooting position. One differentiates between traditionally four shooting positions: legato, non legato, portato and staccato. It is common to the traditional shooting positions that the finger stands nearly in the 90-Grad-Winkel on the key and only with the finger crest is to affect the key.
Deviations from the traditional notice way (like e.g. in the jazz music) appropriate effects have. Also Mozart already created an alternative notice as six-year one in its piece “butter bread “: With the back of all fingers of a hand, thus the fingernail - side, paints the pianist here several times in the piece over a whole Oktave of keys. This effect is to remind naturally optically of painting butter bread.
The notice, more exactly said, the possibility, of obtaining by notice determined effects on the string is also one of the main differences between the piano and other, optically similar key instruments as the organ or the Synthesizer.
Good Digitalpianos is characterised by the fact that they endeavor itself to seize the notice as exactly as possible and to convert him as accurately as possible on the virtual string. The large Japanese manufacturers of Digitalpianos such as Yamaha, Casio, Roland or Kawai developed thereby all own techniques, which go up to the complete simulation of the whole operational sequence of finger over hammer up to the string (with Yamahas silent Piano).