A level meter displaying method which is capable of changing the rate of change in the angle or position of an indicator in at least one particular input signal level range. A scale image obtained according to a function which nonlinearly varies with a signal level of the sound signal is displayed on a display. The signal level of the sound signal is converted into an indicator angle or indicator position of the level meter according to the function. A level image corresponding to the resulting indicator angle or indicator position is displayed on the display. A curve having at least two inflection points each of which is a boundary between a region where a rate of change of the indicator angle or the indicator position to be converted according to the function is larger, and a region where the indicator angle or the indicator position is smaller is generated by the function.