Patent ID: 8005243

Claim:
A parameter display controller applied to an acoustic signal processing apparatus having a parameter display portion displaying a value of a parameter by use of a plurality of display elements of the acoustic signal processing apparatus, said parameter display controller comprising: a parameter setting portion for setting a value of the parameter within a first range of parameter values, wherein the first range includes an extinguishing value; a first display controlling portion for energizing all of the display elements of said plurality of display elements of the acoustic signal processing apparatus when the value set by the parameter setting portion is any value within the first range of parameter values except the extinguishing value of the first range, at least one of the energized display elements of said plurality of display elements of the acoustic signal processing apparatus being illuminated brightly in a first display mode, said at least one of the energized display elements illuminated brightly in the first display mode representing a second range of parameter values from the extinguishing value up to and including the set value, and the remaining energized display elements of said plurality of display elements of the acoustic signal processing apparatus being illuminated dimly in a second display mode different from the first display mode; and a second display controlling portion for extinguishing all of the display elements of said plurality of display elements of the acoustic signal processing apparatus when the set value of the parameter is the extinguishing value.