Keyboard expression often shortened to expression is the ability of the
keyboard of a
keyboard instrument to respond to the
dynamics of the music.For example, the
piano responds exceptionally well to the force with which the keys are initially pressed; It is velocity sensitive. Several of its predecessors, such as the
harpsichord, were less velocity sensitive than the piano, which is one of the key advantages of the piano.The
clavichord and some
electronic keyboards also respond to the force with which a key is held down after the initial impact; They are pressure sensitive. This can be used by a skilled clavichord player to slightly correct the
intonation of the notes, and/or to play with a form of
vibrato known as
bebung.
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