PURPOSE: To provide the input information changing device of the electronic musical instrument which enables, for example, a beginner to play well and an advanced player to play more superiorly by adjusting the effect extent of a key touch, etc.

CONSTITUTION: It is decided whether a key 3 is lower or upper and when a key number is lower, touch data on the key 3 are changed on the basis of the map of a (previously set) lower touch curve. When the key number is upper, on the other hand, the touch data on the key 3 is changed on the basis of the map of a (previously set) upper touch data Namely, this process is a process for discriminating between lower and upper touch data according to the key number.