To correctly control a subject of control by absorbing individual difference of pressure added to a pressure-sensitive button.

Pressure-sensitive values for high, medium, and low, for example, are set by each user, and a prescribed margin is added to each pressure-sensitive value that is set. For example, in a case where the minimum value for high is set at level A by the user, the level-A value plus the margin is set as the minimum value for high on the device side. For determination of pressure on the pressure-sensitive button, pressure is determined with consideration of the margin. Individual difference of pressure on the pressure-sensitive button is thus absorbed, thereby the subject of control can be correctly controlled.