A plurality of areas are set on an image displayed on a display screen, and a plurality of performance indexes, each of which indicates a range of each of the areas, are displayed. An area designated by an operation input is detected, and sound output information is generated when an operation input, which designates one of the areas, and then further designates another area other than the designated area, is detected. Thereafter, a sound is outputted from a speaker in accordance with the sound output information.